Abstract

The invention relates to a two-phase heat transfer device (1) capable of operating in a space environment, the device comprising: - a cavity (10) containing a two-phase fluid in the liquid-vapour equilibrium state; - a flexible portion (30) and two interface parts (40), one of the interface parts, the flexible portion and the other interface part being successively connected to one another, the device being characterised in that the flexible portion comprises a sealed flexible sheath (31) inside which at least one flexible internal liquid circulation duct (32) extends, which duct is surrounded by a space (33) for circulating the vapour.

IPC Classes  ?

• F28D 15/02 - Heat-exchange apparatus with the intermediate heat-transfer medium in closed tubes passing into or through the conduit walls in which the medium condenses and evaporates, e.g. heat-pipes

Abstract

The invention relates to an angular positioning module (1) for a positioning system for an optical bench, the angular positioning module (1) comprising: a fixed frame (5); a rotating shaft (7); a rotary motor (11); a transmission device (17) being provided with a pulley (19) mounted on the output rod (13) of the rotary motor (11) so as to be coupled in rotation therewith, with a wheel (21) mounted on the rotating shaft (7) so as to be coupled in rotation therewith, and with a cable wound on the one hand around the pulley (19) and on the other hand around the wheel (21) such that the pulley (19) and the wheel (21) are connected by two separate strands of the cable, the rotation of the pulley (19) causing the winding of a first strand and the simultaneous unwinding of a separate second strand around the pulley (19), and vice versa.

IPC Classes  ?

• G02B 7/00 - Mountings, adjusting means, or light-tight connections, for optical elements
• F16H 19/06 - Gearings comprising essentially only toothed gears or friction members and not capable of conveying indefinitely-continuing rotary motion for interconverting rotary motion and reciprocating motion comprising an endless flexible member

Abstract

The present disclosure relates to a method for determining at least one pointing law, in a time window, for an observation instrument of at least one EO satellite (20) searching for EO space objects (50), the determination method comprising: - determining, from a list of space objects, space objects that are observable from the at least one satellite in an observation window, the duration of which is equal to or greater than the duration of the time window; - determining, in the time window and in a given satellite reference frame, referred to as the observation reference frame, a space-time distribution of the space objects that are observable in the observation window from the at least one satellite; - determining a pointing law for the observation instrument, in the time window and in the observation reference frame, according to the space-time distribution.

IPC Classes  ?

• B64G 3/00 - Observing or tracking cosmonautic vehicles
• B64G 1/10 - Artificial satellites; Systems of such satellites; Interplanetary vehicles
• B64G 1/68 - Arrangements or adaptations of apparatus or instruments, not otherwise provided for of meteoroid or space debris detectors
• H04N 23/695 - Control of camera direction for changing a field of view, e.g. pan, tilt or based on tracking of objects

Abstract

The invention relates to thermoregulated space equipment (10) which comprises at least one mechanical support structure (1) comprising a first metal portion (2) for interfacing with the equipment, which first metal portion is rigidly connected to at least one second metal portion (3) for interfacing with a space platform (20), characterised in that the mechanical support structure further comprises at least one metal mesh (4) which forms a mechanical connection between the first and second interface portions, the mechanical support structure also comprising at least one mechanically rigid and thermally insulating block of material (5) which continuously and rigidly connects the first and second interface portions and fills the metal mesh.

IPC Classes  ?

• B64G 1/50 - Arrangements or adaptations of devices for control of environment or living conditions for temperature control
• B64G 1/66 - Arrangements or adaptations of apparatus or instruments, not otherwise provided for
• B64G 1/58 - Thermal protection, e.g. heat shields

Abstract

The invention provides a demosaicing method applied to an initial image to obtain a demosaiced image allowing improved demosaicing by virtue of the fact that it comprises: applying a stabilization transform to stabilize noise variance, and, for each reference patch: • determining (310) a set of similar patches • determining (320) a covariance matrix of said set of similar patches and • for each similar patch, computing estimates of interpolated spectral bands, depending on a block decomposition of the covariance matrix (340) depending on phasing, determining interpolated spectral bands by aggregating (350) the estimates of the interpolated spectral bands, and performing an inverse transform on the stabilization transform.

IPC Classes  ?

• G06T 3/40 - Scaling of a whole image or part thereof

Abstract

The invention relates to a method (100) for dimensioning a space launcher (LS), the space launcher (LS) comprising at least one module (M1, M2, M3), the at least one module (M1, M2, M3) comprising a structure (ST1, ST2, ST3), the method (100) comprising the following steps: - determining (101) a set of load cases to be taken into account for dimensioning the at least one module (M1, M2, M3) of the launcher (LS), a load case being defined as a combination of mechanical force components that are simultaneously applied to the structure (ST1, ST2, ST3) of the at least one module (M1, M2, M3), each combination comprising a number N of mechanical force components, the set of load cases being defined in an N-dimensional space; - projecting (102) the set into an n-dimensional hyperplane, n being smaller than N; - determining (103) a projection sheath in the hyperplane, the sheath defining a load case subset; - using (104) the load case subset to dimension the at least one module (M1, M2, M3).

IPC Classes  ?

• B64G 1/00 - Cosmonautic vehicles
• G06F 30/15 - Vehicle, aircraft or watercraft design

Abstract

Method (100) for simulating a dynamic system comprising the steps of modelling (1011) one component and another component by means of one neural network (V) and of another neural network (T1, T2), each comprising an input layer, which is configured to receive values of physical parameters (X1VV, X2VV, X3VV), (Y1VV, Y2VV, Y3VV), and values of physical parameters (Y1T1T1, Y2T1T1, Y3T1T1) (X1T2T2, X2T2T2, X3T2T1T1T2T2T2) of the other neural network (T1, T2) when the component and the other component have a common dynamic interface, so that the neural network (V) and the other neural network (T1, T2) form an interconnected network of neural networks (T1, V, T2), to model a dynamic behaviour of the dynamic system, comprising said component and said other component, and of simulating (102) the dynamic behaviour of the dynamic system.

IPC Classes  ?

• G06F 30/27 - Design optimisation, verification or simulation using machine learning, e.g. artificial intelligence, neural networks, support vector machines [SVM] or training a model
• G06F 113/08 - Fluids
• G06F 113/14 - Pipes

Abstract

The invention relates to a method (100) for controlling the orbit of a satellite, which method comprises: - determining (102) a manoeuvre plan (PMA) comprising at least one previous manoeuvre (PM1) of the previous manoeuvre plan (PPMA), if the at least one previous manoeuvre (PM1 = MA1) is implemented on a date corresponding to a previous fixed part (PPF) and the prediction horizon (HP), the manoeuvre plan (PMA) comprising at least one manoeuvre (MA2, MA3) implemented during a part of the prediction horizon; - identifying (103) a collision risk; - determining (104) a new manoeuvre plan (NPMA) comprising a previous manoeuvre (PM1, PM2, PM3) of the previous manoeuvre plan (PPMA), if the previous manoeuvre is implemented within the previous prediction horizon (PHP) and the prediction horizon (HP) of the new manoeuvre plan (NPMA), and comprising a new manoeuvre (NMA4), implemented over a new part of the prediction horizon (HP).

IPC Classes  ?

• B64G 1/24 - Guiding or controlling apparatus, e.g. for attitude control
• B64G 1/52 - Protection, safety or emergency devices; Survival aids

Abstract

0122 are, respectively, the density of the liquid and of the surrounding fluid.

IPC Classes  ?

• G01N 13/02 - Investigating surface tension of liquids

Abstract

iiiiiii.

IPC Classes  ?

• G01F 11/02 - Apparatus requiring external operation adapted at each repeated and identical operation to measure and separate a predetermined volume of fluid or fluent solid material from a supply or container, without regard to weight, and to deliver it with measuring chambers which expand or contract during measurement
• A61M 5/19 - Syringes having more than one chamber
• A61M 5/20 - Automatic syringes, e.g. with automatically actuated piston rod, with automatic needle injection, filling automatically
• B01L 3/02 - Burettes; Pipettes
• B05C 17/005 - Hand tools or apparatus using hand-held tools, for applying liquids or other fluent materials to, for spreading applied liquids or other fluent materials on, or for partially removing applied liquids or other fluent materials from, surfaces for discharging material through an outlet orifice by pressure
• B05C 17/01 - Hand tools or apparatus using hand-held tools, for applying liquids or other fluent materials to, for spreading applied liquids or other fluent materials on, or for partially removing applied liquids or other fluent materials from, surfaces for discharging material through an outlet orifice by pressure with mechanically or electrically actuated piston or the like
• B05C 5/02 - Apparatus in which liquid or other fluent material is projected, poured or allowed to flow on to the surface of the work from an outlet device in contact, or almost in contact, with the work
• B05C 11/10 - Storage, supply or control of liquid or other fluent material; Recovery of excess liquid or other fluent material
• G01F 11/30 - Apparatus requiring external operation adapted at each repeated and identical operation to measure and separate a predetermined volume of fluid or fluent solid material from a supply or container, without regard to weight, and to deliver it with stationary measuring chambers having constant volume during measurement with supply and discharge valves of the lift or plug-lift type

Abstract

Method (100) for guiding a user holding in one hand (4) a probe (1) configured for ultrasonic observation of a body (5) of a patient, the method comprising the following steps: placing (101) a support at a point on the surface of the body, in order to maintain an object (3) comprising markers in a predetermined position and orientation with respect to a reference frame; acquiring (102) at least one image; determining (103) the reference frame from the markers identifiable by processing of the at least one image, the recorded position (PE) and the recorded direction (DE) of the probe (1) being defined in the reference frame; determining (104) coordinates of at least one vertex of a polygon (P) placed in a first plane transverse to the recorded direction (DE) of the probe; displaying (105) the at least one image on the display device; projecting (106) the at least one vertex of a polygon (P) onto the at least one displayed image; determining (107) the actual position (PA) and the actual direction (DA) of the probe (1) in the reference frame, based on the markers identifiable on the at least one image; determining (108) coordinates in the reference frame of at least one vertex of the polygon (P) placed in a second plane transverse to the actual direction of the probe; projecting (109) the at least one vertex onto the at least one displayed image; bringing (110) the probe into a new actual position and a new actual direction, the new actual position and the new actual direction coinciding with the recorded position (PE) and the recorded direction (DE).

IPC Classes  ?

• A61B 8/00 - Diagnosis using ultrasonic, sonic or infrasonic waves
• A61B 8/08 - Detecting organic movements or changes, e.g. tumours, cysts, swellings

Abstract

ττ defining a natural frequency (A). According to the invention, the laser source (8) is a monofrequency laser source and the light generator (1) comprises modulation means (7, 9) designed to modulate the source beam (10) at a modulation frequency equal to (B), where n is an integer greater than or equal to 1, and the photodetector (5) and the electronic signal-processing system (6) are configured to acquire and process a signal representative of the interference beam (15) at a demodulation frequency equal to (C).

IPC Classes  ?

• G01C 19/72 - Gyrometers using the Sagnac effect, i.e. rotation-induced shifts between counter-rotating electromagnetic beams with counter-rotating light beams in a passive ring, e.g. fibre laser gyrometers

Abstract

The invention relates to a substrate coated with a coating consisting of molybdenum (Mo) atoms, sulfur (S) atoms, tantalum (Ta) atoms and oxygen (O) atoms present in the form of one or more compounds chosen from the compounds of formula (I): [Chem 16] MowSxTayOz (I) in which w is equal to 0 or 1; x ranges from 0 to 2; y ranges from 0 to 1 and z ranges from 0 to 3; said coating comprising at least 5 at.% of oxygen and said coating having a dense compact microstructure.

IPC Classes  ?

• C23C 14/00 - Coating by vacuum evaporation, by sputtering or by ion implantation of the coating forming material
• C23C 14/06 - Coating by vacuum evaporation, by sputtering or by ion implantation of the coating forming material characterised by the coating material
• C23C 14/08 - Oxides
• C23C 14/34 - Sputtering
• C23C 14/35 - Sputtering by application of a magnetic field, e.g. magnetron sputtering

Abstract

The invention relates to a spacecraft (1) for the distribution of electrical energy to client craft (2) at points situated in free space, in orbit and/or on a celestial body, the spacecraft (1) comprising a main structure (10) equipped with an electric thruster (10A), with a chemical thruster (10B) and with a solar generator (10C), a first fuel container (11) for fuel intended for the electric thruster (10A), and a second fuel container (12) for fuel intended for the chemical thruster (10B), the spacecraft (1) being able to be modulated such that: the main structure (10) can be coupled/decoupled alternatively to/from the first container (11) or the second container (12), the first container (11) and the second container (12) being able to be coupled/decoupled to/from one another, the solar generator (10C) being intended to be deployed or retracted.

IPC Classes  ?

• B64G 1/10 - Artificial satellites; Systems of such satellites; Interplanetary vehicles
• B64G 1/40 - Arrangements or adaptations of propulsion systems
• B64G 1/42 - Arrangements or adaptations of power supply systems
• B64G 1/62 - Systems for re-entry into the earth's atmosphere; Retarding or landing devices
• B64G 1/64 - Systems for coupling or separating cosmonautic vehicles or parts thereof, e.g. docking arrangements
• B64G 1/16 - Extraterrestrial cars

Abstract

The invention relates to a computer-implemented method (100) for automatically determining a target architecture from a set of target architectures in order to implement an algorithm, the method comprising the following steps: selecting (101) a language to produce a source code for the algorithm, the language being associated with a compiler of the language, the compiler comprising at least one compilation optimisation option; compiling (102) the source code for the algorithm according to the at least one compilation optimisation option to produce an object code; measuring (103) at least one performance score of the produced object code, the at least one performance score being measured according to a metric; determining (105) the target architecture after calculating (104) an affinity function from the at least one performance score of the object code produced by the at least one compilation optimisation option and from at least one reference score of a reference object code produced by compiling a reference source code produced for a reference algorithm in the selected language, the reference algorithm being associated with the target architecture.

IPC Classes  ?

• G06F 8/41 - Compilation
• G06F 8/77 - Software metrics
• G06F 11/34 - Recording or statistical evaluation of computer activity, e.g. of down time, of input/output operation

Abstract

The invention relates to an electronically controlled expansion valve (1) having a controlled valve (10) inserted between a source (2) at a first pressure (P1) and an outlet (3) at a second pressure (P2), a pressure sensor (9) designed to measure the second pressure and a computer (7) designed to control the valve (10) so as to bring about a pressure drop between the source and the outlet, making it possible to feedback-control the second pressure (P2) to a setpoint pressure (Pref), the valve (10) comprising an actuator (14) for driving a member (13) for restricting a passage section (11) for the fluid, between the source (2) and the fluid outlet (3), so as to vary the passage section, the restriction (11) being implemented by means of a passage orifice (12) for the fluid and a shut-off member (13) placed on the axis of the orifice and designed such that an axial movement of the shut-off member (13) brings about a variation in the passage section (11) for the fluid, the expansion valve (1) having a position sensor (19) for the shut-off member (13), characterized in that the computer (7) uses a first control law (LC1) to make the position (X1) of the shut-off member (13) converge towards a setpoint position (Yr), the setpoint position (Yr) being determined via a second control layer (LC2) for making the second pressure (P2) converge towards the setpoint pressure (Pref), on the basis of a model (MD) of a flow rate (Dcol) through the expansion valve (1), the second control law (LC2) also being determined on the basis of a model (MP) of the second pressure (P2) as a function of the flow rate (Dcol) through the expansion valve and a consumption flow rate (Ds) downstream of the fluid outlet (3).

IPC Classes  ?

• G05D 16/20 - Control of fluid pressure characterised by the use of electric means

Abstract

MesMesMes). The invention also relates to a modulation method and to a measuring device.

IPC Classes  ?

• G01C 19/72 - Gyrometers using the Sagnac effect, i.e. rotation-induced shifts between counter-rotating electromagnetic beams with counter-rotating light beams in a passive ring, e.g. fibre laser gyrometers
• G01R 15/24 - Adaptations providing voltage or current isolation, e.g. for high-voltage or high-current networks using light-modulating devices

Abstract

The invention relates to a method for reducing the Kerr effect in an interferometry measuring device (1) comprising a generator configured to emit an input periodic light signal (3), and a Sagnac interferometer (4) in which two counterpropagating signals (15, 16) travel and combine so as to form a periodic output signal (11) having at least two power values, the method comprising a. determining a phase shift between the two counterpropagating signals (15, 16) a first time and cancelling out the phase shift, and then b. determining a phase shift between the two counterpropagating signals (15, 16) a second time, c. adjusting the ratio between the average powers of the counterpropagating signals (15, 16) so as to cancel out the value of the phase shift determined in the second determination. The invention also relates to an interferometry measuring device configured to implement the method according to the invention.

IPC Classes  ?

• G01C 19/72 - Gyrometers using the Sagnac effect, i.e. rotation-induced shifts between counter-rotating electromagnetic beams with counter-rotating light beams in a passive ring, e.g. fibre laser gyrometers

Abstract

The present invention relates to an aerostat (1) comprising: - an inflatable body (2) configured to be pressurised by a gas lighter than the atmosphere, - a payload support member (3) configured to support a payload, the support member being arranged under the inflatable body and being connected to the inflatable body, - a solar energy generator (7) arranged under the support member and connected to the support member, the solar energy generator being retractable between a first position referred to as the storage position, and a second position referred to as the use position, the solar energy generator comprising a plurality of photovoltaic panels (72) which are retractable between the storage position, in which the photovoltaic panels are grouped and extend horizontally below one another in horizontal planes (P), and the use position, in which the photovoltaic panels are deployed and extend vertically below one another in the same vertical plane (V).

IPC Classes  ?

• B64B 1/40 - Balloons
• B64B 1/48 - Balloons associated with apparatus to cause bursting to enable load to be dropped by parachute

Abstract

Disclosed is a method (100) for acquiring and analysing a scene (4) by image difference, the method (100) comprising the steps of acquiring (101) a first image of the scene (4), the first image being formed by ambient light reflected or scattered by the scene; excitation (102) of the scene by an excitation source (1), the excitation (102) triggering an emission of light from at least part of the scene, during an emission time period; acquiring (103) a second image of the scene, the acquiring (103) of the second image being synchronised with the excitation (102) so that the acquisition of the second image is carried out during the emission time, the second image being formed by the emission of light from the scene added to the reflected or scattered ambient light; calculating a second image (104) adjusted with respect to the first image in order to compensate a relative movement of the scene with respect to the sensor (2), calculating (105) a differential image, the differential image being a difference between the first image and the second, adjusted image.

IPC Classes  ?

• H04N 5/232 - Devices for controlling television cameras, e.g. remote control
• G06T 7/254 - Analysis of motion involving subtraction of images
• H04N 5/225 - Television cameras

Abstract

The present description relates to a substrate (108) for an electronic chip (110), comprising: a first printed circuit board (300); a first conductive region (310), intended to receive the chip and located on a first face (108i) of the first board; and a second conductive region (320), intended to receive a thermal connector (200) and located on a second face (108s) of the first board, opposite the first face, the first region being connected to the second region by at least one conductive through-via (330) located plumb with the first region.

IPC Classes  ?

• H05K 1/02 - Printed circuits - Details
• H01L 23/367 - Cooling facilitated by shape of device
• H01L 23/44 - Arrangements for cooling, heating, ventilating or temperature compensation the complete device being wholly immersed in a fluid other than air
• H01L 23/13 - Mountings, e.g. non-detachable insulating substrates characterised by the shape
• H01L 23/498 - Leads on insulating substrates

Abstract

Receiver (10) of radionavigation signals, comprising a radiofrequency stage (E1); a generator (E2) of a carrier-replica signal (Srep(t)); a mixer (47) for mixing the carrier-replica signal (Srep(t)) with a digitised GNSS signal (Sr(t)); a loop (E4) for automatically controlling code position, comprising a generator (E4a) of code-replica signals; a plurality of correlators (E4c) able to compute a correlation function between the main code-replica signal (SCR(L)(t)) and the baseband signal Sbb(t) in order to produce a main correlation (50); a computer (E4d) of a correlation-power indicator, which is configured to determine correlation powers and to determine a maximum correlation power; a correction computer (E4e) configured to determine an adjusted code frequency; the loop (E4) for automatically controlling code position comprising an output that delivers at least the main correlation (50).

IPC Classes  ?

• G01S 19/25 - Acquisition or tracking of signals transmitted by the system involving aiding data received from a cooperating element, e.g. assisted GPS
• G01S 19/30 - Acquisition or tracking of signals transmitted by the system code related

Abstract

Method (100) for constructing a high-resolution (HR) mixed signal from low-resolution (BR) signals acquired by an acquisition device (10), comprising the following steps: acquiring (101) low-resolution signals (BR); measuring and/or estimating (101') acquisition parameters (PA); pre-mixing (101a) the signals according to the low-resolution signals and the parameters (PA); filtering (101b) the pre-mixed signal; transmitting (102) the filtered pre-mixed signal and the parameters (PA); calculating (103) an estimate of the pre-mixed signal by inversely filtering the pre-mixed filtered signal; determining (104), according to a variational method, the high resolution mixed signal from the estimate of the pre-mixed signal and the parameters, a resolution of the mixed signal being greater than a resolution of each signal.

IPC Classes  ?

• G06T 5/00 - Image enhancement or restoration
• G06T 5/50 - Image enhancement or restoration by the use of more than one image, e.g. averaging, subtraction

Abstract

The present invention relates to an aerostat (1) comprising: - an inflatable body (2) having a cylindrical shape comprising a first pole (22) and a second pole (24), - a triangular sail (4) arranged under the inflatable body and comprising a first vertex (42) and a second vertex (44) such that a first side (46) of the sail extends in contact with the inflatable body, the sail comprising a third free vertex (48) with a payload (5) attached thereto, - a fastening device (7) comprising a first strand (70) and a second strand (72), the fastening device being connected to a cable (6) configured to keep the aerostat connected to a surface of the planet with an atmosphere.

IPC Classes  ?

• B64B 1/52 - Captive balloons attaching trailing entanglements
• B64B 1/58 - Arrangements or construction of gas-bags; Filling arrangements
• B64B 1/24 - Arrangement of propulsion plant

Abstract

The invention relates to a piece comprising a first metal part (12) and a second part (14) made of an organic matrix composite material, in which the first part (12) has a first connecting portion (12A) and the second part (14) has a second connecting portion (14A), the second connecting portion (14A) having at least one blind hole (14B1, 14B2), the second connecting portion (14A) being totally or partially sandwiched between the first connecting portion (12A) and a metal fastening element (16), the fastening element (16) being fixed to the first part (12) on a portion (12D) other than the first connecting portion (12A) and extending into the at least one blind hole (14B1, 14B2), whereby the first part (12) and the second part (14) are fixed to one another.

IPC Classes  ?

• B29C 65/64 - Joining a non-plastics element to a plastics element, e.g. by force
• F02K 9/00 - Rocket-engine plants, i.e. plants carrying both fuel and oxidant therefor; Control thereof
• B22F 10/25 - Direct deposition of metal particles, e.g. direct metal deposition [DMD] or laser engineered net shaping [LENS]
• B22F 7/08 - Manufacture of composite layers, workpieces, or articles, comprising metallic powder, by sintering the powder, with or without compacting of composite workpieces or articles from parts, e.g. to form tipped tools with one or more parts not made from powder
• B33Y 80/00 - Products made by additive manufacturing
• B29K 105/06 - Condition, form or state of moulded material containing reinforcements, fillers or inserts

Abstract

The invention relates to a method for assembling a first metal part (12) with a second part (14) made of an organic matrix composite material, the first part (12) having a first connecting portion (12A) and the second part (14) having a second connecting portion (14B), the method comprising the steps of: - causing the first connecting portion and the second connecting portion to overlap, a through-hole (14B) of the second connecting portion opening onto the first connecting portion, - forming a protective layer (18) on the side wall (14B3) of the through-hole, - forming a seal (19A) between the protective layer and the first connecting portion, and - forming, by additive manufacturing using spray deposition of metal powder driven by a cold gas, a fastening element (20) which extends into the through-hole, is fastened to the first connecting portion and encloses the second connecting portion.

IPC Classes  ?

• B29C 65/64 - Joining a non-plastics element to a plastics element, e.g. by force
• B22F 10/25 - Direct deposition of metal particles, e.g. direct metal deposition [DMD] or laser engineered net shaping [LENS]
• B22F 7/08 - Manufacture of composite layers, workpieces, or articles, comprising metallic powder, by sintering the powder, with or without compacting of composite workpieces or articles from parts, e.g. to form tipped tools with one or more parts not made from powder
• B33Y 10/00 - Processes of additive manufacturing
• B33Y 80/00 - Products made by additive manufacturing
• F02K 9/00 - Rocket-engine plants, i.e. plants carrying both fuel and oxidant therefor; Control thereof
• B29K 105/06 - Condition, form or state of moulded material containing reinforcements, fillers or inserts

Abstract

The invention relates to a piece comprising a first metal part (12) and a second part (14) made of an organic matrix composite material, in which the first part (12) has a first connecting portion (12A) and the second part (14) has a second connecting portion (14A), the second connecting portion (14A) having at least one through-hole (14B), the second connecting portion (14A) being totally or partially sandwiched between the first connecting portion (12A) and a metal fastening element (16), the fastening element (16) being fixed to the first part (12), on the one hand, on the first connecting portion (12D) via the through-hole (14B) of the second connecting portion (14A) and, on the other hand, on a portion (12D) other than the first connecting portion (12A), whereby the first part (12) and the second part (14) are fixed to one another.

IPC Classes  ?

• B29C 65/64 - Joining a non-plastics element to a plastics element, e.g. by force
• F02K 9/00 - Rocket-engine plants, i.e. plants carrying both fuel and oxidant therefor; Control thereof
• B22F 10/25 - Direct deposition of metal particles, e.g. direct metal deposition [DMD] or laser engineered net shaping [LENS]
• B22F 7/08 - Manufacture of composite layers, workpieces, or articles, comprising metallic powder, by sintering the powder, with or without compacting of composite workpieces or articles from parts, e.g. to form tipped tools with one or more parts not made from powder
• B33Y 80/00 - Products made by additive manufacturing
• B29K 105/06 - Condition, form or state of moulded material containing reinforcements, fillers or inserts

Abstract

The invention relates to a deployment device (1) for a nano-satellite (5) comprising a main structure (2) mounted on a launcher, a support frame (3) carrying the nano-satellite (5), a locking/unlocking structure (4), the deployment device (1) being characterised in that the locking/unlocking structure (4) comprises a first clamping element (41) complementary to a second clamping element (42) of the support frame (3), and an actuating element (43) that is elastically deformable such that: in a locked position, it constrains the first clamping element (41) against the second clamping element (42) in order to hold the support frame (3) to the main structure (2) and, in an unlocked position, it releases the first clamping element (41) from the second clamping element (42) so as to release the support frame (3) from the main structure (2) in order for it to be ejected.

IPC Classes  ?

• B64G 1/64 - Systems for coupling or separating cosmonautic vehicles or parts thereof, e.g. docking arrangements

Abstract

The present invention relates to a radiofrequency antenna (1) which is adapted to be mounted on a spacecraft, wherein the antenna (1) comprises four helical strands (10) of a superelastic shape memory alloy and is configured to move from a deployed configuration to a constrained stacking configuration and to return autonomously to the deployed configuration.

IPC Classes  ?

• H01Q 1/28 - Adaptation for use in or on aircraft, missiles, satellites, or balloons
• H01Q 1/36 - Structural form of radiating elements, e.g. cone, spiral, umbrella
• H01Q 11/08 - Helical antennas

Abstract

A device (1, 1', 1'') for retaining and releasing a bar (2, 2''), the device (1, 1', 1'') comprising a clamping component (3, 3'), a retaining and releasing component (4) and at least one unclamping component (5, 5'), the retaining and releasing component (4) comprising a plurality of segments (41, 42, 43, 44, 41', 42', 43', 44', 41'', 42''), each comprising a first bearing surface (71, 72) configured to bear on part of the bar (2) when the plurality of segments (41, 42, 43, 44, 41', 42', 43', 44', 41'', 42'') is in a retention configuration under the effect of a clamping pressure generated by the clamping component (3, 3'), the plurality of segments (41, 42, 43, 44, 41', 42', 43', 44', 41'', 42'') comprising a second bearing surface (8, 8') configured to bear on an end of the at least one unclamping component (5, 5'), the at least one unclamping component (5, 5') being produced from a first single effect shape memory material, with each end of the at least one unclamping component (5, 5') exerting an unclamping pressure compensating the clamping pressure, so as to place the retaining and releasing component (4) in a configuration in which the part of the arm (2, 2'') is released.

IPC Classes  ?

• F16B 1/00 - Devices for securing together, or preventing relative movement between, constructional elements or machine parts
• B64G 1/64 - Systems for coupling or separating cosmonautic vehicles or parts thereof, e.g. docking arrangements
• B64G 1/22 - Parts of, or equipment specially adapted for fitting in or to, cosmonautic vehicles

Abstract

The present invention concerns the field of microreaction devices and of micro-process engineering. It particularly involves devices having micro-channels (internal chambers with micrometric to submicrometric dimensions) for conveying chemical or biochemical mixtures and/or reactions. More specifically, such devices are optimised to achieve high temperature and pressure stresses (i.e. 500°C and 500 bar). For observation and analysis purposes, the microreaction devices have a wide range of transparency in terms of wavelengths. The subject matter of the present invention relates to a microfluid or microreactor device made of transparent sapphire, preferably in the wavelength range ranging from 150 to 6500 nm, and to its manufacturing method and to its use.

IPC Classes  ?

• B01J 19/00 - Chemical, physical or physico-chemical processes in general; Their relevant apparatus

Abstract

The invention relates to a composite tank (100) for receiving and storing a cryogenic propellant, the composite tank (100) comprising: a sealing envelope (1) delimiting a storage chamber for the cryogenic propellant, the sealing envelope (1) comprising a first composite material, and a reinforcement layer (2) configured to at least partially cover the sealing envelope (1), the reinforcement layer (2) comprising a second composite material.

IPC Classes  ?

• F17C 1/16 - Pressure vessels, e.g. gas cylinder, gas tank, replaceable cartridge constructed of plastics materials

Abstract

Method (100) for optical detection of an object by an image sensor, the object and the image sensor being movable relative to each other, the image sensor being configured to receive a measurement of a movement speed of the sensor, which speed is measured in a frame of reference that is fixed relative to the object, the method comprising the following steps: defining (101) an area in an image plane of the sensor which comprises a central point; calculating a movement speed (102) from a virtual image point in the image plane, the virtual image point being a virtual image of a virtual object point formed on the image plane at the central point of the area, the movement speed being calculated on the basis of the movement speed of the image sensor; determining (103) an integration time which is an increasing function of the movement speed; acquiring (104) a raw image on the basis of the integration time; calculating a reference image (105) as a function of an estimated movement of the image point during the integration time; calculating a corrected image (106); selecting (107) pixels in the corrected image.

IPC Classes  ?

• G01S 5/16 - Position-fixing by co-ordinating two or more direction or position-line determinations; Position-fixing by co-ordinating two or more distance determinations using electromagnetic waves other than radio waves
• G06T 7/20 - Analysis of motion
• G06T 7/70 - Determining position or orientation of objects or cameras
• G01S 3/786 - Systems for determining direction or deviation from predetermined direction using adjustment of orientation of directivity characteristics of a detector or detector system to give a desired condition of signal derived from that detector or detector system the desired condition being maintained automatically

Abstract

The invention relates to a method for manufacturing a multi-material part by additive manufacturing, comprising the following steps: a) a step of providing a pretreated metal powder comprising grains and an oxidised and porous layer on the surface of the grains; b) a step of powder bed selective laser melting comprising the implementation of the following steps i) and ii): i) a step of forming a layer from the pretreated metal powder; ii) a step of laser melting of the layer, carried out in a reactive atmosphere and comprising the adaptation of application parameters of the laser in order to transform at least one first zone of the layer in such a way as to reduce its electrical conductivity, thus forming a dielectric, and in order to densify at least one second zone of the layer without transforming it, the at least one first zone being formed when the application parameters of the laser allow a first energy density to be applied to the first zone and/or the laser beam to be held for a first hold time on the first zone, the at least one second zone being formed when the application parameters of the laser allow a second energy density to be applied to the second zone and/or the laser beam to be held for a second hold time on the second zone, and the first energy density being greater than the second energy density and/or the first hold time being greater than the second hold time. The invention also relates to a part obtained by this method.

IPC Classes  ?

• B22F 3/105 - Sintering only by using electric current, laser radiation or plasma
• B33Y 10/00 - Processes of additive manufacturing
• B33Y 70/10 - Composites of different types of material, e.g. mixtures of ceramics and polymers or mixtures of metals and biomaterials
• B33Y 70/00 - Materials specially adapted for additive manufacturing
• B33Y 80/00 - Products made by additive manufacturing
• B33Y 40/10 - Pre-treatment
• B22F 1/00 - Metallic powder; Treatment of metallic powder, e.g. to facilitate working or to improve properties
• B22F 1/02 - Special treatment of metallic powder, e.g. to facilitate working, to improve properties; Metallic powders per se, e.g. mixtures of particles of different composition comprising coating of the powder
• B22F 3/11 - Making porous workpieces or articles
• B22F 7/06 - Manufacture of composite layers, workpieces, or articles, comprising metallic powder, by sintering the powder, with or without compacting of composite workpieces or articles from parts, e.g. to form tipped tools
• C22C 1/04 - Making non-ferrous alloys by powder metallurgy
• C22C 1/10 - Alloys containing non-metals
• B22F 10/28 - Powder bed fusion, e.g. selective laser melting [SLM] or electron beam melting [EBM]
• B22F 10/32 - Process control of the atmosphere, e.g. composition or pressure in a building chamber
• B22F 10/34 - Process control of powder characteristics, e.g. density, oxidation or flowability
• B22F 10/368 - Temperature or temperature gradient, e.g. temperature of the melt pool
• B22F 10/38 - Process control to achieve specific product aspects, e.g. surface smoothness, density, porosity or hollow structures
• C22C 29/12 - Alloys based on carbides, oxides, borides, nitrides or silicides, e.g. cermets, or other metal compounds, e. g. oxynitrides, sulfides based on oxides
• C22C 29/16 - Alloys based on carbides, oxides, borides, nitrides or silicides, e.g. cermets, or other metal compounds, e. g. oxynitrides, sulfides based on nitrides

Abstract

Method for virtual surveillance of at least one movable object, the method being carried out by a surveillance unit and comprising, for each of the one or more movable objects, a step (12) of receiving virtual surveillance parameters from a surveillance unit, a step (14) of receiving a current position of the movable object from any one of the surveillance or monitoring units and a step (16) of establishing a virtual authorised zone which is attached to the movable object and defined on a virtual map in accordance with the virtual surveillance parameters, the virtual authorised zone comprising the current position. The method also comprises a step (20) of receiving data concerning the movement of the movable object from any one of the surveillance or monitoring units and finally a step (22) of modifying the virtual authorised zone.

IPC Classes  ?

• H04W 12/08 - Access security
• H04W 12/64 - Location-dependent; Proximity-dependent using geofenced areas
• H04W 4/021 - Services related to particular areas, e.g. point of interest [POI] services, venue services or geofences
• G08B 21/02 - Alarms for ensuring the safety of persons

Abstract

A method for determining a corrected signal, allowing the errors associated with multiple paths to be reduced, said method comprising a step (12) of receiving a plurality of incident signals originating from a plurality of signal transmission units, such that each incident signal of the plurality of incident signals originates from a signal transmission unit of the plurality of signal transmission units and a step (14) of characterising at least one incident signal as a multiple path signal, a step (18) of determining a correction scale for each of the at least one multiple path type signals, as well as a step (22) of creating a correction table, and a step (24) of determining at least one corrected signal as a function of the correction table.

IPC Classes  ?

• G01S 19/22 - Multipath-related issues
• G01S 5/02 - Position-fixing by co-ordinating two or more direction or position-line determinations; Position-fixing by co-ordinating two or more distance determinations using radio waves

Abstract

One subject of the present invention relates to a sol-gel method for manufacturing a wet gel, a xerogel and a powder of yttrium-aluminum garnet. Another subject is an extrusion paste comprising the abovementioned wet gel, xerogel or powder. The invention further relates to the use of a wet gel, a xerogel, a powder of yttrium-aluminum garnet or an extrusion paste comprising a wet gel, a xerogel or a powder of yttrium-aluminum garnet to manufacture an article, preferably by extrusion, microextrusion or filament deposition printing and also to said article.

IPC Classes  ?

• C01F 17/34 - Aluminates, e.g. YAlO3 or Y3-xGdxAl5O12

Abstract

The invention relates to a propulsion unit (1) for a rocket, comprising a tank (2) designed to contain a propellant, an engine comprising a combustion chamber (3) configured to subject the propellant to combustion generating exhaust gases, a supply circuit (4) disposed between the propellant tank (2) and the combustion chamber (3) configured to supply the combustion chamber (3) with propellant and an exhaust gas circuit (8) disposed between the combustion chamber (3) and the propellant tank (2) configured to convey at least part of the exhaust gases from the combustion chamber (3) to the propellant tank (2) in order to pressurise it.

IPC Classes  ?

• F02K 9/50 - Feeding propellants using pressurised fluid to pressurize the propellants
• F02K 9/46 - Feeding propellants using pumps
• F02K 9/48 - Feeding propellants using pumps driven by a gas turbine fed by propellant combustion gases
• F02K 9/56 - Control
• F02K 9/60 - Rocket-engine plants, i.e. plants carrying both fuel and oxidant therefor; Control thereof using liquid or gaseous propellants - Details not otherwise provided for
• F02K 9/97 - Rocket nozzles

Abstract

Method for covering the inner surface (2) of a tank (100), the method comprising the following steps: - a) providing a tank (100) made of a composite material, such as a thermoplastic material or a thermosetting material, the tank being configured to receive a pressurised fluid, - b) spraying a liquid composition (6) comprising a fluoropolymer, a prepolymer and a crosslinking agent of the prepolymer onto the inner surface (2) of the tank (100) so as to form a cover layer (7) covering the inner surface (2), and - c) polymerising the cover layer (7) so as to generate a polymeric binder encapsulating the fluoropolymer and form a fluorinated coating (8) covering at least part of the inner surface (2).

IPC Classes  ?

• C08F 259/08 - Macromolecular compounds obtained by polymerising monomers on to polymers of halogen containing monomers as defined in group on to polymers containing fluorine
• C09D 127/12 - Coating compositions based on homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by a halogen; Coating compositions based on derivatives of such polymers not modified by chemical after-treatment containing fluorine atoms
• C08F 299/00 - Macromolecular compounds obtained by interreacting polymers involving only carbon-to-carbon unsaturated bond reactions, in the absence of non-macromolecular monomers

Abstract

Method for decreasing errors related to multipath propagation of a noisy acquired signal, comprising a step of receiving a noisy signal comprising a known signature, a step of decomposing the noisy signal into wavelets, and a step of reconstructing a signal reconstructed from a combination of wavelets selected from the wavelets obtained in the decomposing step. The method also comprises a step of constructing an expected signal from the known signature, a step of estimating the similarity of the reconstructed signal to the expected signal, and a step of estimating the direct signal using the result of the step of estimating the similarity.

IPC Classes  ?

• G01S 19/22 - Multipath-related issues

Abstract

LLL of the insulating support (17) being chosen so as to maximize the number of emission modules (10) in the emission plane.

IPC Classes  ?

• F03H 1/00 - Use of plasma to produce a reactive propulsive thrust

Abstract

The invention mainly relates to a cryogenic cooler comprising a cold region, a heat-transfer fluid circuit, the cold region being positioned in the circuit, an application heat exchanger configured to exchange calories with a device to be cooled, characterised in that the cooler comprises at least one passive non-return valve fluidly connected to the cold region, the heat exchanger comprising at least one first fluid inlet positioned downstream of the non-return valve in the flow direction of the heat-transfer fluid, the heat-transfer fluid circulating from the end of the cold region.

IPC Classes  ?

• F25B 9/14 - Compression machines, plants or systems, in which the refrigerant is air or other gas of low boiling point characterised by the cycle used, e.g. Stirling cycle
• F25B 25/00 - Machines, plants or systems, using a combination of modes of operation covered by two or more of the groups
• F25D 19/00 - Arrangement or mounting of refrigeration units with respect to devices

Abstract

The application relates to a tubular composite structure (1) able to deploy by shape-memory effect and having two ends (3, 4), the tubular composite structure (1) able to deploy by shape-memory effect comprising a single heating jacket, formed of braided fibres made of a single electrically resistive material and impregnated with a shape-memory resin (110), and defining an interior space (200) circumscribed by the heating jacket (110), the braided fibres ensuring autonomous deployment of the tubular composite structure and providing structural integrity to the structure in the deployed position.

IPC Classes  ?

• B29C 70/88 - Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts characterised primarily by possessing specific properties, e.g. electrically conductive or locally reinforced
• B29C 61/00 - Shaping by liberation of internal stresses; Making preforms having internal stresses; Apparatus therefor
• B29C 61/06 - Making preforms having internal stresses, e.g. plastic memory
• H01Q 1/08 - Means for collapsing antennas or parts thereof
• B29C 61/04 - Thermal expansion
• H01Q 1/28 - Adaptation for use in or on aircraft, missiles, satellites, or balloons
• H01Q 1/14 - Supports; Mounting means for wire or other non-rigid radiating elements
• B29K 105/08 - Condition, form or state of moulded material containing reinforcements, fillers or inserts of continuous length, e.g. cords, rovings, mats, fabrics, strands or yarns
• B29L 31/30 - Vehicles, e.g. ships or aircraft, or body parts thereof
• B29L 31/34 - Electrical apparatus, e.g. sparking plugs or parts thereof

Abstract

The present description relates to a device (7) for recognising the attitude of an object, characterized in that it comprises: a sphere (11) comprising a wall (13) able to let a light flux at least partially pass; a ball (17), moveably mounted inside said sphere (11); an image-acquiring device (19), arranged in said attitude-recognising device (7) to acquire a two-dimensional image of the ball (17) and of the sphere (11); a device (21) for emitting a light flux, arranged in said attitude-recognising device (7) to emit a light flux in the direction of said sphere (11); an image-processing device (23) that is connected to the image-acquiring device (19), controlled by an image-processing algorithm and designed to control the device (21) for emitting a light flux, with a view to collecting said image acquired by said image-acquiring device (19) and to determining, from said image (29), a gravity vector (G) having as origin the centre (Os) of the sphere (11) and as end the centre (OB) of the ball (17).

IPC Classes  ?

• G01C 9/10 - Measuring inclination, e.g. by clinometers, by levels by using rolling bodies
• G01C 9/06 - Electric or photoelectric indication or reading means
• G01C 21/24 - Navigation; Navigational instruments not provided for in groups specially adapted for cosmonautical navigation
• B64G 1/10 - Artificial satellites; Systems of such satellites; Interplanetary vehicles
• B64G 1/24 - Guiding or controlling apparatus, e.g. for attitude control
• B64G 1/66 - Arrangements or adaptations of apparatus or instruments, not otherwise provided for

Abstract

The invention relates, inter alia, to a communication system (6) comprising a communication receiver (60) which is provided to receive a useful communication signal from a remote light emission source (61), characterised in that the communication receiver (60) is formed by a matrix image camera (60a1) having a field of view (C1), in which the light emission source (61) is contained, the camera (60a1) comprising a matrix detector (60a2).

IPC Classes  ?

• H04B 10/118 - Arrangements specific to free-space transmission, i.e. transmission through air or vacuum specially adapted for satellite communication

Abstract

Solid booster (14) for a launcher, the booster being suitable for being separated from the rest of the launcher and comprising a wall (18) defining a combustion chamber (19) comprising an end, termed a front end (19a), and an opposite end, termed a rear end (19b), propellant (24) arranged in the combustion chamber, a combustion channel (26) passing through the combustion chamber from the front end toward the rear end, a nozzle (22) arranged at the rear end of the combustion chamber, an ignition (28) closing off the combustion channel at the front end of the combustion chamber, a skirt (20) covering the ignition at the front end of the combustion chamber, the skirt allowing the mechanical link with the rest of the launcher, and an ignition ejection system (34, 36, 38).

IPC Classes  ?

• F02K 9/08 - Rocket-engine plants, i.e. plants carrying both fuel and oxidant therefor; Control thereof using solid propellants
• F02K 9/32 - Rocket-engine plants, i.e. plants carrying both fuel and oxidant therefor; Control thereof using solid propellants - Details not otherwise provided for
• F02K 9/95 - Rocket-engine plants, i.e. plants carrying both fuel and oxidant therefor; Control thereof characterised by starting or ignition means or arrangements

Abstract

Method (100) for generating at least one GNSS signal, the method comprising the following steps of: measurement (101) by a GNSS receiver (8) of a value of at least one parameter of a first GNSS signal (9) received by the GNSS receiver (8); fitting (102) of the value of the at least one parameter of the first GNSS signal (9), and/or determination (103) of another value of at least one other parameter, the at least one other parameter corresponding to at least one other simulated GNSS signal; generation (104) of at least one GNSS signal generated on the basis of the fitted value of the at least one parameter and/or generation of at least one other GNSS signal generated on the basis of the other value of the at least one other parameter.

IPC Classes  ?

• G01S 19/03 - Cooperating elements; Interaction or communication between different cooperating elements or between cooperating elements and receivers
• G01S 19/23 - Testing, monitoring, correcting or calibrating of a receiver element

Abstract

Method for the robust monitoring of at least one parameter of a GNSS signal Method for the monitoring of a GNSS signal, the method comprising steps of: replication of the carrier; integration, over an integration time period to generate an error signal; measurement of a signal-to-noise ratio; filtering of the first error signal with passband Bn; estimation of the frequency and/or of the phase of the carrier and of the phase of the PRN code; updating of the first control value as a function of the estimated frequency of the carrier, a first time interval separating two successive updates as a function of the estimated frequency, and of the estimated phase of the carrier, the first time interval being equal to the integration time period multiplied by a first variable number greater than or equal to 1, a first width of passband of the filtering step and the first variable number each being determined as a function of the signal-to-noise ratio and of the first filtered signal.

IPC Classes  ?

• G01S 19/24 - Acquisition or tracking of signals transmitted by the system

Abstract

The invention relates to a method and a device for measuring at least one atmospheric parameter (gas, temperature), implementing steps of acquiring spectral images in the ultraviolet and/or the visible and/or the infrared range and scanning according to a tomographic principle. The spectral images are acquired using a network of optical systems (1A-1D) such as infrared cameras, and are used to estimate the air quality and/or meteorological and/or climate parameters in a geographic area, for example an urban agglomeration.

IPC Classes  ?

• G01N 21/31 - Investigating relative effect of material at wavelengths characteristic of specific elements or molecules, e.g. atomic absorption spectrometry
• G01W 1/00 - Meteorology
• G01N 21/17 - Systems in which incident light is modified in accordance with the properties of the material investigated

Abstract

The invention relates to a device for the frequency transposition of an input signal centred on a frequency (f1) to an output signal centred on a frequency (f2). Such a device comprises a module for averaging the input signal delivering a set of N first intermediate signals. A first intermediate signal of index (i), where i is a whole number from 1 to N, is a function of an i-th sliding average of the input signal over an i-th first time window of the form [(i-1)/(N*f1); i/(N*f1)] periodised at the frequency (f1). The device also comprises a module for reconstructing the output signal by temporal concatenation of N second intermediate signals windowed in second successive time windows. A second intermediate signal of index (k), where k is a whole number from 1 to N, is obtained from a windowing of the first intermediate signal of index (k) in a k-th second time window of the form [(k-1)/(N*f2); k/(N*f2)] periodised at the frequence (f2).

IPC Classes  ?

• H03D 9/00 - Demodulation or transference of modulation of modulated electromagnetic waves
• H04B 1/00 - TRANSMISSION - Details of transmission systems not characterised by the medium used for transmission

Abstract

Method for processing a sequence of digital signal samples comprising a first sub-sequence and a second sub-sequence, said method comprising: forming (106) a first block of samples comprising the first sub-sequence and a second block of samples comprising header samples followed by the second sub-sequence; demodulating (108) the first block of samples through a digital demodulator to produce a first block of symbols, and the second block of digital signal samples through a second digital demodulator to produce a second block of symbols, the second demodulator implementing a carrier synchronisation or symbol rate synchronisation starting with the header samples (E6-E9), which comprise samples in a number adapted in such a way that the synchronisation is effective before the second demodulator demodulates the second sub-sequence; and reconstructing (114) a sequence of symbols by concatenating the first symbol block with the second symbol block.

IPC Classes  ?

• H04L 27/18 - Phase-modulated carrier systems, i.e. using phase-shift keying
• H04L 27/233 - Demodulator circuits; Receiver circuits using non-coherent demodulation
• H04L 7/04 - Speed or phase control by synchronisation signals
• H04B 1/00 - TRANSMISSION - Details of transmission systems not characterised by the medium used for transmission

Abstract

The invention relates to a tunable microwave system (10) comprising at least two elements, every element being selected from among a propagation guide, an evanescent guide, a resonator (Res1, Res2, Resi, Res) and at least one coupling device (CD, CDi, CDE, CDS, CDL1i, CDL2i, CDij)) disposed between the two elements and designed to interconnect said two elements, the coupling device comprising a support (Sp) having an opening (Ap) and further comprising at least one element (40) which is elongated in a direction called polarization direction (Dp) extending in an opening plane (P), said elongated element (40) being secured to the periphery (30) of the opening along at least one end, the coupling device further being configured to be rotatable about an axis that is substantially perpendicular to the opening plane in such a way as to modify a value of the direction of polarization (Dp) and in such a way that the coupling between the two elements is dependent on the value of the direction of polarization.

IPC Classes  ?

• H01P 1/06 - Movable joints, e.g. rotating joints
• H01P 5/04 - Coupling devices of the waveguide type with variable factor of coupling
• H01P 1/165 - Auxiliary devices for rotating the plane of polarisation
• H01P 1/12 - Auxiliary devices for switching or interrupting by mechanical chopper
• H01P 1/211 - Waffle-iron filters; Corrugated structures
• H01P 1/219 - Evanescent mode filters
• H01P 5/18 - Conjugate devices, i.e. devices having at least one port decoupled from one other port consisting of two coupled guides, e.g. directional couplers

Abstract

The invention relates to a method for estimating misalignment (δθ) on the basis of a sum-channel modulated radiofrequency signal (Σ) and a difference-channel modulated radiofrequency signal (Δ), called primary signals, said method comprising the following steps: - (E1) receiving the primary signals (Σ, Δ) modulated over a central frequency (f0), - (E2) generating a reply signal from the received sum-channel signal (Σ), - (E3) calculating, for every primary signal, at least one intercorrelation product from said primary signal (Σ, Δ) and the reply signal (Σs), - (E4) estimating the misalignment (δθ) by means of the calculated intercorrelation products previously obtained for the sum channel (Σ) and the difference channel (Δ).

IPC Classes  ?

• G01S 3/32 - Systems for determining direction or deviation from predetermined direction using amplitude comparison of signals derived simultaneously from receiving antennas or antenna systems having differently-oriented directivity characteristics derived from different combinations of signals from separate antennas, e.g. comparing sum with difference

Abstract

The invention is based on the observation that, considering the pedalling movement, the power developed by a cyclist takes the form of a permanent sine curve with a frequency that is double the pedalling frequency. This cyclic power variation results in a small oscillation of the speed of the cyclist, the amplitude of which can be observed through GNSS phase measurements which are more precise by an order of magnitude. A first aspect of the invention relates to a method for determining the pedalling cadence of a cyclist (10) on a cycle (12), wherein the pedalling cadence is extracted from an oscillation of GNSS signal phase measurements (16) taken on the cycle (12) via a GNSS receiver (14) or an oscillation of measurements calculated on the basis of the phase measurements.

IPC Classes  ?

• G01S 19/19 - Sporting applications

Abstract

The invention relates to a method and system for transmitting data packets via a random access (RA) transmission channel, shared by a plurality of user terminals, which uses and processes a function for attributing and distributing F transmission resources F(u) to the user terminals, whose knowledge of the graph is shared by the transmitting user terminals and the receiving station in a prior step. When decoding received packets, the graph {(u, F(u)} of the attribution and distribution function is processed by the receiving station (6) to minimise or even cancel the number of correlations for locating replicas required in the case of a blockage of the standard decoding process of the CRDSA protocol.

IPC Classes  ?

• H04W 74/08 - Non-scheduled access, e.g. random access, ALOHA or CSMA [Carrier Sense Multiple Access]

Abstract

Method and device to decode a GNSS signal in a GNSS receiver (300) comprising a channel decoder (134), wherein the GNSS receiver is configured to: - determine parameters relative to a statistical propagation channel model (301, 302, 303), the statistical propagation channel model being a Prieto channel model or a Perez-Fontan channel model, - compute a statistical channel attenuation from said statistical propagation channel model (310) using the parameters, - compute LLRs from a detection function (333) adapted to the statistical propagation channel model using the computed statistical channel attenuation, and - use the said LLRs to feed the channel decoder.

IPC Classes  ?

• H04L 25/03 - Shaping networks in transmitter or receiver, e.g. adaptive shaping networks

Abstract

The invention relates to a method for designing a plan for acquiring zones to be implemented by a space system comprising at least one satellite for several users, the method comprising the steps according to which a processor, proceeding from an initial acquisition plan, optionally comprising at least one acquisition Ai having a value v_i: a) receives a candidate acquisition request A_candidate associated with a value v_candidate, the candidate acquisition request having been issued by a user (Ui, Uj); b) determines a candidate plan P_candidate wherein the candidate acquisition request is included the initial plan; and if obtaining the candidate plan requires a deletion of at least one acquisition request from the initial plan, the method comprising a step of c) determining the sum of the values ​​v_i of the acquisition requests from the initial plan that are not included in the candidate plan, the inclusion of the candidate acquisition request being authorised as soon as the the sum is lower than the value v_candidate associated with the candidate acquisition request, wherein the candidate plan is the acquisition plan and at least one acquisition request, which is incompatible with the candidate plan, has been deleted.

IPC Classes  ?

• B64G 1/10 - Artificial satellites; Systems of such satellites; Interplanetary vehicles
• G06F 7/02 - Comparing digital values
• G06Q 10/06 - Resources, workflows, human or project management; Enterprise or organisation planning; Enterprise or organisation modelling
• G08G 5/00 - Traffic control systems for aircraft

Abstract

The invention relates to a device for assembling a first part on a second part (30), said device comprising: at least two jaws (2, 6), said jaws being supported by the first part, such that the jaws can be placed in a closed position, in which the jaws (2, 6) engage with a portion of the second part so as to prevent a separation, in at least one direction and in at least one sense, of said portion of the second part relative to the jaws, and can be placed in an open position, in which the jaws allow separation of said portion, a device (25) for retaining the jaws in the closed position adapted to be able to be broken by melting, characterised in that it comprises a resilient return device adapted to be able to resiliently return said jaws to the open position.

IPC Classes  ?

• F16B 2/10 - Clamps, i.e. with gripping action effected by positive means other than the inherent resistance to deformation of the material of the fastening external, i.e. with contracting action using pivoting jaws
• B64G 1/22 - Parts of, or equipment specially adapted for fitting in or to, cosmonautic vehicles
• F16B 2/08 - Clamps, i.e. with gripping action effected by positive means other than the inherent resistance to deformation of the material of the fastening external, i.e. with contracting action using bands

Abstract

The present invention generally relates to Global Navigation Satellite System (GNSS) positioning techniques. More particularly, it relates to a method to improve the time required to compute a position measurement in a GNSS receiver, and the time required to make this position measurement accurate. The method comprises computing a snapshot PVT (Position Velocity and Time) measurement, and use it to reduce the time required to acquire new signals to compute a conventional PVT measurement. It also relates to a receiver implementing the method.

IPC Classes  ?

• G01S 19/24 - Acquisition or tracking of signals transmitted by the system

Abstract

The invention relates to a foldable/deployable device comprising at least four central sectors (4) each extending from a central portion (5) and forming, in a deployed state of said device, a main surface (20) in which: – each sector is elastic in flexion and is connected laterally to two other central sectors, each sector being connected to another sector by a hinge, each hinge (10, 11) extends in a radial direction, in the deployed state of said device said main surface is a non-ruled warped surface and the shape of each sector has double warping such that it has radial curvature and latitudinal curvature, said radial curvature and said latitudinal curvature being of the same sign, the device being returned to the deployed state by elastic deformation in flexion of each sector.

IPC Classes  ?

• B64G 1/22 - Parts of, or equipment specially adapted for fitting in or to, cosmonautic vehicles
• B64G 1/66 - Arrangements or adaptations of apparatus or instruments, not otherwise provided for
• H01Q 1/28 - Adaptation for use in or on aircraft, missiles, satellites, or balloons
• H01Q 15/16 - Reflecting surfaces; Equivalent structures curved in two dimensions, e.g. paraboloidal

Abstract

There is disclosed a system for locating an object on a surface waveguide. The surface waveguide is made of one or more 1D wires and/or 2D waveguides comprising conductive elements arranged in patterns. Emitters with known positions can couple with receivers coupled with the surface waveguide. The position of receivers can be determined, for example by multilateration or signal strength indication. Conductive elements can be sprayed or sewed or otherwise deposited onto surfaces such as a ground floor, a sidewalk or a road lane. Described developments comprise the use of absorbers, protective layers, unidirectional emitters, contactless coupling, and various arrangements comprising frequency-selective layers, arrangements in lattices, treillis or anisotropic surfaces. Signal processing aspects and software embodiments are also described.

IPC Classes  ?

• G01S 5/00 - Position-fixing by co-ordinating two or more direction or position-line determinations; Position-fixing by co-ordinating two or more distance determinations
• G01S 5/02 - Position-fixing by co-ordinating two or more direction or position-line determinations; Position-fixing by co-ordinating two or more distance determinations using radio waves
• G01S 5/08 - Position of single direction-finder fixed by determining direction of a plurality of spaced sources of known location
• G01S 5/10 - Position of receiver fixed by co-ordinating a plurality of position lines defined by path-difference measurements
• G01S 5/12 - Position-fixing by co-ordinating two or more direction or position-line determinations; Position-fixing by co-ordinating two or more distance determinations using radio waves by co-ordinating position lines of different shape, e.g. hyperbolic, circular, elliptical or radial
• G01S 5/14 - Determining absolute distances from a plurality of spaced points of known location
• G01S 5/16 - Position-fixing by co-ordinating two or more direction or position-line determinations; Position-fixing by co-ordinating two or more distance determinations using electromagnetic waves other than radio waves

Abstract

The invention discloses an antenna assembly configured to transmit terrestrial positioning signals from a relay platform having a frame of reference (x, y, z), said transmit being in at least a first mode with a radiating pattern having at least a main lobe having a narrow aperture in a (x, z) plane and a wide aperture in a (y, z) plane. It also discloses a relay platform comprising a receiver of a synchronization signal, a transmitter of positioning signals to an area of service comprising a number of rovers, and an antenna assembly configured to produce a radiating pattern adapted to transmit the positioning signals as a function of the environment of the relay platform and the rovers. In a number of embodiments the relay platforms may be organized in a network of platforms, possibly of masters and slaves that receive feed-back from the rovers in the AoS so as to optimize the configuration of the antenna elements dynamically to optimize the QoS of positioning based on a number of selected quality indexes.

IPC Classes  ?

• G01S 19/11 - Cooperating elements; Interaction or communication between different cooperating elements or between cooperating elements and receivers providing dedicated supplementary positioning signals wherein the cooperating elements are pseudolites or satellite radio beacon positioning system signal repeaters
• G01S 1/04 - Beacons or beacon systems transmitting signals having a characteristic or characteristics capable of being detected by non-directional receivers and defining directions, positions, or position lines fixed relatively to the beacon transmitters; Receivers co-operating therewith using radio waves - Details
• H01Q 3/26 - Arrangements for changing or varying the orientation or the shape of the directional pattern of the waves radiated from an antenna or antenna system varying the distribution of energy across a radiating aperture

Abstract

The invention relates to a user computing device, method and computer program to display a view to the user. The invention allows a user to display a number of different views with photorealistic rendering of how the view should look like at a view time, based solely on view position, and descriptors of the view. In an aspect, the invention deduces from view position and view time the view descriptors (weather parameters, traffic parameters...); selects, in a collection of images, an image of the view based on view position; modifies the image to match descriptors of the view (for example, by adding a rain effect if the image in the collection is under sunshine and the view should be displayed under rain). Thus, the invention allows displaying photorealistic images of how a view should look like at any time.

IPC Classes  ?

• G06T 11/00 - 2D [Two Dimensional] image generation
• G06Q 30/02 - Marketing; Price estimation or determination; Fundraising
• G01C 21/34 - Route searching; Route guidance

Abstract

There is disclosed a positioning device comprising: a first GNSS receiver (101); a communication link configured to receive a spatial position, code measurements and carrier phase measurements of a second GNSS receiver (102); an input interface to a processing logic, said processing logic being configured to: calculate a position of the first positioning device from communicated data; and to estimate one or more parameters representative of multipath at the position of the first positioning device; wherein the communication link is configured to communicate to a second positioning device said parameters representative of multipath at the position of the first positioning device. Described developments comprise the use of multipath severity indicators, the determination of relative distances between receivers, validity conditions in time and/or space of multipath, various embodiments in a train or in a group of vehicles. Software aspects are discussed.

IPC Classes  ?

• G01S 19/07 - Cooperating elements; Interaction or communication between different cooperating elements or between cooperating elements and receivers providing data for correcting measured positioning data, e.g. DGPS [differential GPS] or ionosphere corrections
• G01S 19/40 - Correcting position, velocity or attitude
• G01S 19/22 - Multipath-related issues
• G01S 19/50 - Determining position whereby the position solution is constrained to lie upon a particular curve or surface, e.g. for locomotives on railway tracks

Abstract

The invention concerns a device and the associated method for detecting spoofing of GNSS signals. The device comprises: - an RF chain (311) to acquire and down convert a signal comprising one or more GNSS signals transmitted by GNSS sources, each of said GNSS signals comprising a navigation message modulated by a spreading code associated to a related GNSS source, - an analog to digital converter, to digitize the down converted signal, and - a computer logic (312), to: ∘ calculate over a grid of spreading code phase delays and Doppler shifts, cross-correlation functions between said digitized signal and locally generated replicas of the signal, for one or more of said spreading codes, ∘ identify cross-correlation peaks, and ∘ analyze the cross-correlation peaks to detect spoofing situations.

IPC Classes  ?

• G01S 19/21 - Interference related issues

Abstract

The invention refers to a terminal (401) to calculate a position and detect spoofing, the terminal comprising: - a receiver of first signals, notably signals of a GNSS type, from first sources (411, 412, 413, 414), to compute a first information relative to its position, as for instance a pseudo range measurement, an ephemeris, a navigation message, spatial coordinates or temporal coordinates, and to calculate a position; - a receiver of a second signal of a non-RF and non-GNSS type from a second source, notably from an optical display (402), the second signal comprising a second information transmitted using a predetermined encoding format to retrieve said second information; - a processing logic configured to detect spoofing by comparing the first and second information. The invention further refers to the associated transmitters, authentication server and spoofing detection methods.

IPC Classes  ?

• G01S 19/21 - Interference related issues
• G01S 5/02 - Position-fixing by co-ordinating two or more direction or position-line determinations; Position-fixing by co-ordinating two or more distance determinations using radio waves

Abstract

This microwave component (10) comprises a waveguide (12) comprising an upper layer, a lower layer, and a central layer (18) intermediate between the upper layer and the lower layer, said layers defining a zone (19) of propagation of an electromagnetic wave, the propagation zone (19) extending along a propagation axis, and comprising a cavity (32) bounded by the upper layer, the lower layer, and, laterally, by two opposite lateral edges (36) of the central layer (18). The waveguide (12) comprises at least one dielectric strip (28) placed in the propagation zone (19), the dielectric strip (28) being defined in one of the upper layer and the lower layer or being placed in the cavity (32) away from the lateral edges (36) of the cavity (32).

IPC Classes  ?

• H01P 3/12 - Hollow waveguides
• H01P 1/208 - Cascaded cavities; Cascaded resonators inside a hollow waveguide structure
• H01P 3/123 - Hollow waveguides with a complex or stepped cross-section, e.g. ridged or grooved waveguides
• H01P 11/00 - Apparatus or processes specially adapted for manufacturing waveguides or resonators, lines, or other devices of the waveguide type

Abstract

The invention refers to an add-on device configured to reduce the power level of reflected paths of GNSS signals (612, 613) reaching a GNSS receiver's antenna, the associated GNSS receiver set, some equipment embedding the add-on device, and the associated method to reduce the power level of reflected GNSS signals. The GNSS signals are transmitted according to a first polarization, and the add-on device comprises a material (601) configured to be transparent to said first polarization and to reflect GNSS signals polarized according to a second polarization orthogonal to said first polarization.

IPC Classes  ?

• G01S 19/22 - Multipath-related issues
• G01S 19/35 - Constructional details or hardware or software details of the signal processing chain

Abstract

ababb being chosen to allow simultaneous and selective propagation of two orthogonal propagation modes.

IPC Classes  ?

• H01P 1/161 - Auxiliary devices for mode conversion sustaining two independent orthogonal modes, e.g. orthomode transducer
• H01P 3/123 - Hollow waveguides with a complex or stepped cross-section, e.g. ridged or grooved waveguides
• H01P 5/19 - Conjugate devices, i.e. devices having at least one port decoupled from one other port of the junction type
• H01Q 21/00 - Antenna arrays or systems

Abstract

This waveguide assembly comprises a receiving component (14) and an active electronic component (12). The receiving component (14) comprises a waveguide (16), the waveguide (16) defining a propagation zone (40) extending along a propagation axis, the waveguide (16) successively comprising, in a vertical direction that is orthogonal to the propagation axis, an upper layer (18), an upper intermediate layer, a central layer (22), a lower intermediate layer (24) and a lower layer (26), the receiving component (14) delimiting a receiving cavity (28) for receiving the active component (12), the active component (12) being received in the cavity (28), the cavity (28) being made through the upper layer (18) and the upper intermediate layer, and extending in the vertical direction from the central layer (22) up to an upper surface (42A) of the upper layer (18).

IPC Classes  ?

• H01P 7/06 - Cavity resonators
• H01P 3/12 - Hollow waveguides
• H01P 5/107 - Hollow-waveguide/strip-line transitions
• H05K 1/02 - Printed circuits - Details

Abstract

The invention relates to a radar (1) including: - an emission channel (10) for generating a burst of pulses, the emission channel including an ultrashort pulse laser controlled by a HF oscillator and a device for stretching the duration of the pulses and amplifying them, - a return channel (20) for receiving the echo of the burst of pulses, including an optical compressor (21) for reducing the duration of the pulses and a streak camera (22) synchronised with the HF oscillator.

IPC Classes  ?

• G01S 17/10 - Systems determining position data of a target for measuring distance only using transmission of interrupted, pulse-modulated waves
• G01S 7/484 - Transmitters
• G01S 7/486 - Receivers
• H01S 3/00 - Lasers, i.e. devices using stimulated emission of electromagnetic radiation in the infrared, visible or ultraviolet wave range

Abstract

The present invention relates to a method of detecting and correcting lock-on of an antenna to a target by a sidelobe during automatic tracking of the target by the antenna. The method comprises the step (110) of measurement of a first reception level corresponding to the reception level of the radioelectric signals during a nominal phase, the step (120) of measurement of a second reception level corresponding to the reception level of the radioelectric signals during a phase of pick-up and of comparison (130) of the difference between the first and the second reception level with a first predetermined threshold and when this difference is greater than this threshold, detection of lock-on of the antenna to the target by a sidelobe of the antenna during the pick-up phase.

IPC Classes  ?

• G01S 3/42 - Systems for determining direction or deviation from predetermined direction using adjustment of real or effective orientation of directivity characteristic of an antenna or an antenna system to give a desired condition of signal derived from that antenna or antenna system, e.g. to give a maximum or minimum signal the desired condition being maintained automatically
• H01Q 1/12 - Supports; Mounting means
• H01Q 3/08 - Arrangements for changing or varying the orientation or the shape of the directional pattern of the waves radiated from an antenna or antenna system using mechanical movement of antenna or antenna system as a whole for varying two co-ordinates of the orientation

Abstract

Method for detecting ignition in a combustion chamber (10) of a rocket motor, in which : A) for each of the propellants (H,O), values are acquired for parameters that make it possible to calculate the mean values PGC_H0, PGC_H1 and the standard deviations σ_PGCH0, σ_PGCHl of a theoretical pressure for ignition and a theoretical pressure for non-ignition in the combustion chamber; B) on the basis of these values, the means PGC_H0, PGC_H1 and standard deviations σ_PGCH0, σ_PGCHl of the theoretical pressure for ignition and the theoretical pressure for non-ignition in the combustion chamber are calculated; C) a motor ignition status (S) is determined such that the value Ignited, Not ignited, Indeterminate is assigned to the ignition status (S) of the motor, by performing the Wald test. Device, computer program, recording medium, for implementing this method. Method for starting a rocket motor, and rocket motor in which ignition is detected using the aforementioned method.

IPC Classes  ?

• F02K 9/56 - Control
• F02K 9/95 - Rocket-engine plants, i.e. plants carrying both fuel and oxidant therefor; Control thereof characterised by starting or ignition means or arrangements
• F02K 9/96 - Rocket-engine plants, i.e. plants carrying both fuel and oxidant therefor; Control thereof characterised by specially adapted arrangements for testing or measuring

Abstract

A microwave component (10) of the transmission line type integrated into the substrate, comprises at least one upper layer (14) having at least one electrically conductive surface (26), a lower layer (16) having at least one electrically conductive surface (44), and a central layer (18) defining a propagation area (20) of an electromagnetic wave extending along a propagation axis. The upper layer (14) comprises at least an upper hole (30) passing through it; the lower layer (16) comprises at least one lower hole (46) passing through it. An electrically conductive wire (22) is received through the upper hole (30), the propagation area (20) and the lower hole (46), the conductive wire (22) being electrically connected to the electrically conductive surface (26) of the upper layer (14) and the electrically conductive surface (44) of the lower layer (16).

IPC Classes  ?

• H01P 3/12 - Hollow waveguides
• H01P 1/208 - Cascaded cavities; Cascaded resonators inside a hollow waveguide structure

Abstract

A microwave component (10) having an upper layer (14), a lower layer (16), and a core layer (18) defining a propagation zone (19) of an electromagnetic wave extending along a propagation axis (X-X), the propagation zone (19) comprising at least one symmetrical propagation chamber (28). The propagation zone (19) further comprises an asymmetrical propagation chamber (32) defined by the upper layer (14), the lower layer (16) and two spaced-apart lateral boundaries (34, 36) suitable for preventing the passage of an electromagnetic wave having a wavelength greater than or equal to a predetermined minimum wavelength, the lateral boundaries (34, 36) of the asymmetric chamber (32) being non-symmetrical in relation to any plane parallel to the plane of symmetry.

IPC Classes  ?

• H01P 1/208 - Cascaded cavities; Cascaded resonators inside a hollow waveguide structure
• H01P 7/06 - Cavity resonators
• H01P 5/02 - Coupling devices of the waveguide type with invariable factor of coupling

Abstract

Device (52) for regulating the rate of flow of propellant fluid for an electric thruster, of the thermo-capillary device type comprising at least one capillary duct that is electrically conductive and capable of regulating the rate of flow of propellant fluid under the action of a change in temperature of the duct, characterized in that said at least one capillary duct comprises a nickel-based alloy.

IPC Classes  ?

• F03H 1/00 - Use of plasma to produce a reactive propulsive thrust
• B64G 1/40 - Arrangements or adaptations of propulsion systems
• G05D 7/06 - Control of flow characterised by the use of electric means

Abstract

The invention relates to the characterization of the movements of a pedestrian. A number of applications, for example hiking, require a good estimation of instantaneous speed-related and altitude-related sets of data. Speed-related and altitude-related sets of data can be measured respectively by speed-related and altitude-related sensors. However measures from such sensor are usually affected by noise, which reduces the precision of measurements. The invention allows obtaining precise estimations of speed-related and altitude-related sets of data, by defining a state vector of the pedestrian comprising speed-related and altitude-related sets of data, as well as a path slope. Estimations of the values of the state vector are obtained, over successive path steps, by measurements from speed-related and altitude-related sensors, and a model of the pedestrian comprising a relationship between a speed of the pedestrian and a path slope. Although the path slope is not directly measured, it allows, in combination with the model of the pedestrian, to perform an effective data fusion between speed- related and altitude-related sets of data.

IPC Classes  ?

• G06F 17/10 - Complex mathematical operations
• G01C 5/06 - Measuring height; Measuring distances transverse to line of sight; Levelling between separated points; Surveyors' levels by using barometric means
• G01C 21/16 - Navigation; Navigational instruments not provided for in groups by using measurement of speed or acceleration executed aboard the object being navigated; Dead reckoning by integrating acceleration or speed, i.e. inertial navigation
• G01C 21/20 - Instruments for performing navigational calculations
• G01C 22/00 - Measuring distance traversed on the ground by vehicles, persons, animals or other moving solid bodies, e.g. using odometers or using pedometers
• G06K 9/00 - Methods or arrangements for reading or recognising printed or written characters or for recognising patterns, e.g. fingerprints

Abstract

The invention concerns a method for acquiring digital images with an extended dynamic range and an associated method for restoring digital images, as well as corresponding devices. The method for acquiring digital images comprises steps of: - determining (30) a plurality of different integration times, - and for each of the determined integration times, obtaining (32) an initial digital image acquired with the integration time, each initial digital image having a corresponding signal level, - for each initial digital image, applying (34) a clipping function with an associated clipping threshold to obtain a linear signal level according to the lighting, to obtain a processed digital image, and - combining (36) processed digital images to obtain a final image with extended dynamic range, said combination comprising a summation of the signals of the processed digital images, the final image having a linear signal level by fragments according to the lighting.

IPC Classes  ?

• H04N 5/335 - Transforming light or analogous information into electric information using solid-state image sensors [SSIS]
• H04N 5/225 - Television cameras
• H04N 5/235 - Circuitry for compensating for variation in the brightness of the object

Abstract

The invention relates to a method for determining, by reanalysis, a vibratory environment of a coupled vehicle/passenger system, the vehicle being subjected to external forces Fext and being coupled to a new passenger comprising x=l, ...N payload(s), at the level of vehicle/passenger interfaces Ix, the method comprising a step DET1) for determining, based on reference interfacial acceleration γx_ref of a reference passenger, the interfacial acceleration γ' x relative to the new passenger using the following equation (I):

IPC Classes  ?

• G06F 17/12 - Simultaneous equations
• B64G 1/12 - Artificial satellites; Systems of such satellites; Interplanetary vehicles manned
• B64G 1/14 - Space shuttles
• G06F 17/50 - Computer-aided design

Abstract

There is disclosed a device for handling multipath of a G.N.S.S. signal, said device being configured to: - determine a spatial position, a clock time and measured multipath parameters comprising a relative delay and relative amplitude; - communicate to a remote server said spatial position, clock time and multipath parameters; and - receive processed multipath parameters as determined by the remote server. Systems comprising a plurality of such devices and their variants are described. Further aspects are described, in particular the exclusion of one or more satellites, the use of threshold schemes, pull/push modes, configurable refresh rates, quantization of positions, activation of additional sensors, filtering options, determination of merit factors for example as a function of the number of satellites in view and/or of signal-to-noise ratio, peer-to-peer schemes, as well as graphical display, audible sound or haptic feedbacks.

IPC Classes  ?

• G01S 19/03 - Cooperating elements; Interaction or communication between different cooperating elements or between cooperating elements and receivers

Abstract

Method implemented by computer for simulating an optical system (102) comprising the steps consisting in: a) defining a set of light rays or beams at the input (e) of the optical system, each said light ray or beam being represented by a first vector of parameters (101, x e ); and b) calculating, for each said light ray or beam at the input of the optical system, a light ray or beams at the output (s) of the optical system, represented by a second vector of parameters (103, xs) by applying, to each said light ray or beam at the input of the optical system, one and the same nonlinear function, termed the transmission function (I), representative of the optical system as a whole. Computer program product for the implementation of such a method.

IPC Classes  ?

• G06F 17/18 - Complex mathematical operations for evaluating statistical data
• G02C 7/02 - Lenses; Lens systems

Abstract

The invention concerns a method and a device for digital image restoration. The digital image to be restored comes from an initial image acquired by an image acquisition device having an associated acquisition instrumental noise. The method comprises the following steps: - obtaining (30) an intermediate digital image with restoration of the acquisition instrumental noise, - denoising (32) the intermediate digital image in order to obtain a denoised intermediate digital image, - deconvolution (34) of the denoised digital image in order to obtain a restored digital image.

IPC Classes  ?

• G06T 5/00 - Image enhancement or restoration

Abstract

The invention relates to an unmanned aerial vehicle (10) operable by remote control for flying over a zone, comprising an imaging assembly that can capture at least one image of a zone flown over. The imaging assembly comprises a first imaging device (12) with an array of sensors designed to capture a first image of the zone flown over, with a first spatial resolution, and a second imaging device (14) comprising at least one strip of sensors, the at least one strip of sensors being positioned substantially perpendicularly to the direction of travel of the aerial vehicle and designed to capture a second image of the zone flown over, by scanning, with a second spatial resolution higher than the first resolution, said first (12) and second (14) imaging devices being fixed to the aerial vehicle and coupled according to a predetermined coupling relation.

IPC Classes  ?

• G06T 5/50 - Image enhancement or restoration by the use of more than one image, e.g. averaging, subtraction
• H04N 5/372 - Charge-coupled device [CCD] sensors; Time delay and integration [TDI] registers or shift registers specially adapted for SSIS
• H04N 5/374 - Addressed sensors, e.g. MOS or CMOS sensors
• G01C 11/02 - Picture-taking arrangements specially adapted for photogrammetry or photographic surveying, e.g. controlling overlapping of pictures
• H04N 3/14 - Scanning details of television systems; Combination thereof with generation of supply voltages by means not exclusively optical-mechanical by means of electrically scanned solid-state devices
• H04N 5/33 - Transforming infrared radiation
• H04N 5/225 - Television cameras
• H04N 5/232 - Devices for controlling television cameras, e.g. remote control

Abstract

The invention relates to a solid-state thermochromic device comprising a stack, said stack sucessively comprising, from a rear face to a front face exposed to solar radiation: a) a solid substrate consisting of an inorganic material resistant up to a temperature of 550°C, particularly to a temperature of 540°C, for example up to a temperature of 500 °C; b) an infrared-reflective layer consisting of an electronic conductive material; c) electronic insulating interface layers; d) an electronic insulating inorganic dielectric layer transparent to infrared radiation, consisting of cerium oxide CeO2, and having a thickness of between 400 and 900 nm, preferably between 700 and 900 nm; e) electronic insulating interface layers; f) a layer of an infrared-active thermochromic material which is an n-doped vanadium oxide VO2, and crystallised in a monoclinic or rutile phase, with a thickness of between 30 and 50 nm; and g) a solar-reflective solar-protective coating transparent to infrared radiation. The invention also relates to a method for producing said device.

IPC Classes  ?

• C03C 17/36 - Surface treatment of glass, e.g. of devitrified glass, not in the form of fibres or filaments, by coating with at least two coatings having different compositions at least one coating being a metal
• G02B 5/08 - Mirrors
• G02B 7/00 - Mountings, adjusting means, or light-tight connections, for optical elements
• B64G 1/22 - Parts of, or equipment specially adapted for fitting in or to, cosmonautic vehicles
• C09K 9/00 - Tenebrescent materials, i.e. materials for which the range of wavelengths for energy absorption is changed as a result of excitation by some form of energy

Abstract

The invention relates to an electrolyte system (1) for the synthesis of sodium perchlorate by means of the electrochemical oxidation of sodium chlorate, said system (1) including at least: an electrolyte (10) comprising sodium chlorate; an anode (15) in the electrolyte (10), the anode (15) having an outer surface of boron-doped diamond; a cathode (17) in the electrolyte (10); and an electrical generator (20) connected to the anode (15) and to the cathode (17).

IPC Classes  ?

• C25B 11/04 - Electrodes; Manufacture thereof not otherwise provided for characterised by the material
• C25B 11/12 - Electrodes based on carbon
• C25B 1/28 - Per-compounds

Abstract

The invention relates to an electrolyte system (1) for the synthesis of sodium perchlorate by means of the electrochemical oxidation of sodium chlorate, said system (1) including at least: an electrolyte (10) comprising sodium chlorate; an anode (15) in the electrolyte (10), the anode (15) having an outer surface of platinum or platinum alloy; a cathode (17) in the electrolyte (10), the cathode (17) having an outer surface of metal alloy containing between 5 and 25 wt.-% chromium; and an electrical generator (20) connected to the anode (15) and to the cathode (17).

IPC Classes  ?

• C25B 11/04 - Electrodes; Manufacture thereof not otherwise provided for characterised by the material
• C25B 1/28 - Per-compounds
• C25B 15/08 - Supplying or removing reactants or electrolytes; Regeneration of electrolytes

Abstract

The invention relates to a combustion chamber (1) for a rocket motor extending along a longitudinal axis A and comprising a longitudinal envelope, this longitudinal envelope comprising a longitudinal internal wall (10) made of a first alloy which is a copper alloy and which is extended on its radially outer face (15) by a plurality of fins (20) extending radially outwards, each one of these fins having a proximal portion (22), a median portion (25) and a distal portion (28), and comprising an external shell (30) surrounding this longitudinal internal wall (10) and these fins (20), this shell (30) being made of a third alloy different from the first alloy. The proximal portion (22) is made of this first alloy and the distal portion (28) is made of a second alloy which is an alloy different from the first alloy, the median portion (25) of the fin (20) between the proximal portion (22) and the distal portion (28) having a composition that varies gradually with radial distance from the longitudinal axis A from 100% of first alloy at the interface between the proximal portion (22) and the median portion (25) to 100% of second alloy at the interface between the median portion (25) and the distal portion (28), the weldability of the second alloy with the third alloy being better than the weldability of the first alloy with this third alloy, and/or the mechanical strength of the second alloy being greater than that of the first alloy.

IPC Classes  ?

• F02K 9/64 - Combustion or thrust chambers having cooling arrangements
• F02K 9/97 - Rocket nozzles
• B23P 15/00 - Making specific metal objects by operations not covered by a single other subclass or a group in this subclass

Abstract

The present invention relates to novel composite materials enriched with silicon dispersed in matrices comprising Ni, Ti and Si and/or Sn, optionally passivated. The invention also relates to the method for producing said materials and to the use of same as electrodes. The invention further relates to the aforementioned matrices and the synthesis thereof.

IPC Classes  ?

• C22C 30/00 - Alloys containing less than 50% by weight of each constituent
• C22C 13/00 - Alloys based on tin
• C22C 14/00 - Alloys based on titanium
• C22C 19/03 - Alloys based on nickel or cobalt based on nickel
• H01M 4/134 - Electrodes based on metals, Si or alloys
• H01M 4/1395 - Processes of manufacture of electrodes based on metals, Si or alloys

Abstract

A navigation system using Visible Light Communications (VLC), the associated transmitters and receivers, the navigation system comprising a plurality of VLC transmitters (201 to 207) and one or more GNSS receiver (430), each of the VLC transmitters being configured to transmit a positioning signal comprising a navigation message including time information, where the time information is a transmission time of a specific part of said navigation message derived from a GNSS reference time. The receivers (221) according to the invention are configured to calculate a position from either VLC pseudo ranges, GNSS pseudo ranges, or a combination thereof. The associated methods for transmitting positioning signals in a navigation system according to the invention, and for determining a position from a plurality of positioning signals transmitted by said navigation system.

IPC Classes  ?

• G01S 1/70 - Beacons or beacon systems transmitting signals having a characteristic or characteristics capable of being detected by non-directional receivers and defining directions, positions, or position lines fixed relatively to the beacon transmitters; Receivers co-operating therewith using electromagnetic waves other than radio waves
• G01S 5/16 - Position-fixing by co-ordinating two or more direction or position-line determinations; Position-fixing by co-ordinating two or more distance determinations using electromagnetic waves other than radio waves
• G01S 19/11 - Cooperating elements; Interaction or communication between different cooperating elements or between cooperating elements and receivers providing dedicated supplementary positioning signals wherein the cooperating elements are pseudolites or satellite radio beacon positioning system signal repeaters

Abstract

The invention discloses an improved GNSS receiver which determines a location of the receiver by combining a first location determined from the standard PVT and a second location determined by integrating the velocity from the standard PVT. The combination is based on a weighting of the error budgets of the first location and the second location. The improved receiver is preferably based on a standard receiver with an add-on software module which receives and processes data transmitted from the standard receiver by, for example, NMEA messages. The improved receiver allows a determination of a more precise and smoother trajectory in a simple way.

IPC Classes  ?

• G01S 19/42 - Determining position
• G01S 19/52 - Determining velocity

Abstract

The invention discloses an improved GNSS receiver which determines a location of the receiver by combining a first location determined from the standard PVT of a multi-frequency receiver and a second location determined by integrating the velocity from the standard PVT. The combination is based on a duty cycle or a combination of the duty cycle with a weighting of the error budgets of the first position and the second location. The improved receiver is preferably based on a standard receiver with an add-on software module which receives and processes data transmitted from the standard receiver by, for example, NMEA messages. The improved receiver allows a determination of a more precise and smoother trajectory in a simple way.

IPC Classes  ?

• G01S 19/42 - Determining position
• G01S 19/52 - Determining velocity
• G01S 19/22 - Multipath-related issues
• G01S 19/32 - Multimode operation in a single same satellite system, e.g. GPS L1/L2

Abstract

The invention relates to an illuminating device for analysing an object having at least one reflective and/or transparent polished surface, characterised in that said device comprises at least one light source (10, 18, 32, 42) capable of illuminating the object to be analysed at a predetermined angle of illumination when the object is positioned at a predetermined location, said polished surface being orthogonal to a viewing direction and inside the field of view for observing the object, and at least one reflecting or diffusing absorber (14, 16, 34, 36), said absorber being positioned with respect to said light source in such a way that the rays of light coming from said source which do not reach said polished surface or which are reflected by said polished surface are captured by said absorber.

IPC Classes  ?

• G01N 21/88 - Investigating the presence of flaws, defects or contamination
• G01N 21/958 - Inspecting transparent materials
• G01M 11/00 - Testing of optical apparatus; Testing structures by optical methods not otherwise provided for
• G01N 21/57 - Measuring gloss

Abstract

This beacon (16A) for observing an object includes an observation unit (40) able to generate at least one observation datum, and a communicating unit (42) including an emitter (53) able to emit an observation signal corresponding to at least one generated observation datum. The observation signal is intended for a mobile machine able to collect the observation data and to emit ADS-B signals including an ADS-B-type message allowing this machine to be identified. The communication unit (42) furthermore includes a receiver (51) able to receive ADS-B signals issued from the mobile machine, and the communication unit (42) is configured to trigger the emission of the observation signal by the emitter (53) when at least one ADS-B signal is received by the receiver (51).

IPC Classes  ?

• H04B 7/185 - Space-based or airborne stations
• H04W 4/00 - Services specially adapted for wireless communication networks; Facilities therefor

Abstract

The invention relates to a method and a device for reconstructing a useful signal from an acquired signal made up of a plurality of samples representing physical quantities measured, the acquired signal including said useful signal made noisy by a noise, implemented by a processor of a programmable device. The method includes decomposing (32) the acquired signal on a predetermined wavelet decomposition base, according to a given number of decomposition levels, and obtaining corresponding wavelet coefficients representing said acquired signal; estimating (42, 44) a value representing the standard deviation of said noise from at least one portion of the wavelet coefficients; and implementing (34) an iterative method for reconstructing parsimonious signals on the acquired signal, with a dictionary built from the wavelet decomposition base, said iterative method having an associated stop criterion, the stop criterion being calculated (50) as a function of the value representing the estimated noise.

IPC Classes  ?

• G06F 17/14 - Fourier, Walsh or analogous domain transformations
• G01R 1/07 - Non contact-making probes
• G01R 31/308 - Contactless testing using non-ionising electromagnetic radiation, e.g. optical radiation
• G01R 31/311 - Contactless testing using non-ionising electromagnetic radiation, e.g. optical radiation of integrated circuits

Abstract

The invention relates to a radio communication receiver receiving a radio signal (S) including a main polarisation (MAIN-POL) and a secondary polarisation (X-POL) orthogonal to the main polarisation (MAIN-POL), the receiver including: a unit (1) for receiving the main polarisation (MAIN-POL) and the secondary polarisation of the received signal, synchronised as a carrier frequency with the main polarisation (MAIN-POL); a unit (2) for cancelling out the secondary polarisation synchronised with the main polarisation (MAIN-POL) and configured to suppress, from the received signal (S), the interference due to the secondary polarisation (X-POL), the unit (2) for cancelling out the secondary polarisation including a filtering unit (21) that receives the main polarisation (MAIN-POL) and the secondary polarisation (X-POL) as input; a unit (3) for demodulating the filtered signal, located downstream of the cancellation unit and configured to calculate carrier frequency error information and to communicate same by feedback to the upstream receiving unit (1).

IPC Classes  ?

• H04B 7/04 - Diversity systems; Multi-antenna systems, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
• H04B 7/10 - Polarisation diversity; Directional diversity
• H04B 7/00 - Radio transmission systems, i.e. using radiation field

Abstract

The invention relates to a method for detecting atypical behaviour of telemetry parameters, comprising the following steps: dividing (220) the time interval of detection into a plurality of time windows; for each time window, calculating (230) a set of descriptors according to the measurements of said parameter in said time window, and forming an initial vector from the calculated descriptors; normalising (240) the initial vectors; for each inital vector, reducing (250) the dimension of said initial vector in order to form a reduced vector; determining the association of each reduced vector with a domain defined by a nominal behaviour boundary; and when a reduced vector is outside the domain, generating a warning corresponding to atypical behaviour of the parameter.

IPC Classes  ?

• G05B 23/02 - Electric testing or monitoring

Abstract

One aspect of the invention relates to a plug-in for a spreadsheet, which is configured to: provide tools for managing a construction model comprising objects and properties associated with the objects, in particular geometric properties; linking at least some of the properties respectively with a cell, in order to allow the user to modify a property via the respective linked cell; at the request of the user, launching a CAD application and transmitting to same the model for the display taking into account geometric properties of the objects, or, if the CAD application has already been launched, transmitting, in real or almost real time, modifications of the model in order to update the display.

IPC Classes  ?

• G06F 17/50 - Computer-aided design

Abstract

The invention relates to an actuator (10) including a magnetohydrodynamic wheel (20) comprising a fluidic ring and at least one magnetohydrodynamic pump for moving a conductive liquid. Each magnetohydrodynamic pump comprises a means for creating the magnetic field along a magnetic axis and a means for creating the electric field along a current path. The inner portion of the fluidic ring comprises at least two separate basic channels. For each basic channel, the means for creating the electric field comprises one pair of electrodes arranged on either side of this basic channel and capable of creating an electric current that passes through the liquid in said basic channel along the current path.

IPC Classes  ?

• B64G 1/28 - Guiding or controlling apparatus, e.g. for attitude control using inertia or gyro effect
• H02K 44/08 - Magnetohydrodynamic [MHD] generators

Abstract

The invention relates to an observation architecture which comprises, for each object (Oij), an electronic beacon (Bij), at least one terrestrial server (15, 16) capable of processing digital data, and a plurality of aerospace vehicles (Ai). Each aerospace vehicle (Ai) comprises a storage module and a first communication module. The first communication module of at least one of the aerospace vehicles (Ai), referred to as the collection aerospace vehicle, is capable of receiving from at least one electronic beacon (Bij) when the latter is within the field of visibility of said aerospace vehicle (Ai), at least one radio signal corresponding to at least one piece of observation data. At least one of the aerospace vehicles (Ai), referred to as the relay aerospace vehicle, also comprises a second communication module capable of transmitting to a terrestrial server (15, 16) digital data stored in the storage module.

IPC Classes  ?

• H04B 7/185 - Space-based or airborne stations

Abstract

The invention relates to a method (100) for the acquisition and storage of measuring data, implemented by an RFID-type sensor, the sensor being associated with a programmable identifier comprising a static part and a dynamic part. The method (100) comprises a step of acquisition (110) of at least one measurement, a step of forming (120) a packet of measurements comprising the at least one measurement, and a step of integrating (130) the packet of measurements into the dynamic part of the identifier of the sensor.

IPC Classes  ?

• G01D 9/00 - Recording measured values
• G01D 21/00 - Measuring or testing not otherwise provided for
• G01K 1/02 - Means for indicating or recording specially adapted for thermometers
• G06K 7/00 - Methods or arrangements for sensing record carriers
• G06K 19/00 - Record carriers for use with machines and with at least a part designed to carry digital markings