The invention concerns a method for determining the position and orientation of at least one diopter consisting of: • illuminating the diopter (6) to be determined using at least one diffuse non-polarised point source of light (1), • acquiring, by means of an image forming device (2), an image (J) for determining polarimetric information of the reflection or reflections of the point source on the diopter to be determined, • locating, in the image (J), any reflection (13, 15) of the point source of light (1) by the diopter (6) to be determined, and, for each located reflection: - calculating the light beam (3) arriving on the image forming device (2) and, as a polarisation parameter, at least the degree of polarisation of same, - calculating the light beam (8) reflected on the diopter (6) to be determined and deducing the position and orientation (5) of the surface element (4) from the light beam (8) reflected on the diopter (6) to be determined, the polarisation parameter of same, and the known position of the point source (1).
G01B 11/24 - Measuring arrangements characterised by the use of optical techniques for measuring contours or curvatures
G01B 11/25 - Measuring arrangements characterised by the use of optical techniques for measuring contours or curvatures by projecting a pattern, e.g. moiré fringes, on the object
The invention concerns an inspection device comprising: • - a movable element (6) moved relative to a frame (7) and provided with an external control gauge (14) and an internal control gauge (15), • - optical systems (35, 37) for detecting the contact occurring between the internal gauge (15) and the external gauge (14) and the container (2), Each optical detection system (35, 37) comprises: • - a system (70) for transmitting/receiving an optical beam (71) in a direction parallel to the direction of movement of the movable element, • - a mechanism (72, 73) installed on the movable element (6), for transforming the displacement movement of the gauge (14, 15) relative to the movable element (6) into a movement that obstructs or ceases to obstruct the optical beam (71).
G01B 21/10 - Measuring arrangements or details thereof, where the measuring technique is not covered by the other groups of this subclass, unspecified or not relevant for measuring diameters
G01B 5/08 - Measuring arrangements characterised by the use of mechanical techniques for measuring diameters
G01N 21/90 - Investigating the presence of flaws, defects or contamination in a container or its contents
3.
METHOD AND DEVICE FOR OBSERVING AND ANALYSING OPTICAL SINGULARITIES IN GLASS CONTAINERS
The invention relates to a method for observing and analysing optical singularities, consisting: in illuminating the exterior of the container using a luminous surface (6) that is axially symmetric about a vertical axis (Z) parallel to the axis of symmetry of the containers, a variation of a property of the emission being detectable by one or more acquiring systems (11) along a generatrix of the luminous surface; in the case of low transmission containers, in imaging the container portion with the image acquiring device receiving light beams originating from that portion of the luminous surface (6) which is located on the same side of the container; or, in the case of high transmission containers, in imaging the container portion with the image acquiring device receiving light beams originating from that portion of the luminous surface (6) which is radially opposite relative to the container.
The invention pertains to a method for measuring verticality on a rotating container. • At least one image of the container is taken, so as to obtain the image of the left edge of the ring, the image of the right edge of the ring, the matrix image of the left edge (Img) of the heel, shoulder and/or base of the neck, the matrix image of the right edge (lmd), respectively of the heel, shoulder, and/or base of the neck. • The following are analysed: * the image of the left edge of the ring and the image of the right edge of the ring in order to determine the actual position of the ring, * the matrix image of the left and right edges in order to determine a left positioning point Tg and a right positioning point Td, • the theoretical position of the ring is determined, on a perpendicular of the right-hand segment passing through the left and right positioning points, - and based on the variations of the difference between the actual position and theoretical position of the ring, a verticality measurement for the container is deduced.
The invention relates to a facility for measuring the thickness of the wall of containers, comprising: an optical system (15) for collecting light beams reflected by the outer and inner surfaces of the wall and focussing same on the detection plane of the light sensor (14). According to the invention, the optical system (15) for collecting and focussing the light beams comprises: a first objective (21) having an object plane located in the vicinity of the point of impact of the light beam incident on the wall (3); an at least translucent diffusing screen (23) arranged in the image plane of the first objective (21) in such a way as to physically represent the light beams collected by the first objective (21) in the form of hot spots (Ti); and a second objective (25) comprising the diffusing screen (23) as the object plane and the light sensor (14) as the image plane.
The invention relates to an in-line optical method of inspecting transparent or translucent containers (3) travelling between a light source (7) and a system (9) for taking images of the containers and analysing the images taken. According to the invention, the method comprises the steps of: illuminating each container (3) using the light source (7) having a light intensity variation according to a periodic pattern (71) of period T1 along at least one first direction of variation (D); for each container (3), taking a number of images N, greater than or equal to three, of the container passing in front of the light source and occupying respectively N different positions along the length of the path; between each image capture, creating a relative shift between the container and the periodic pattern according to a direction of variation (D) of the periodic pattern (71); determining and applying a geometric transformation in at least N-1 images of a single container for at least one set of points belonging to the container, in order to align the pixels belonging to the container in the N successive images of a single container; for each container (3), constructing a phase image from the N adjusted images of the container; and analysing the phase image in order to deduce therefrom at least the presence of a light-refracting defect or the distribution quality of the material forming the container.
The invention relates to an optical method for inspecting containers (2), said method consisting in: producing at least one image (10) of each container; determining, in the image of the container, at least one search area (Zr) wherein at least one visual motif appears (3); producing a digital mask (Mi) for at least one area (Zt) for processing the images comprising at least the visual motif (3); and comparing at least each pixel of the image processing area with a digital mask (Mi). According to the invention, the method consists in: selecting at least one visual motif (3) pertaining to the container; determining the position and the orientation of the visual motif (3) selected in said search area (Zr) of the image of the container; applying a geometric transformation (T) to the digital mask (Mi) or the processing area (Zt) in such a way as to be able, during the processing step, to place the mask (Mi) and the processing area (Zt) in a position of coincidence; and applying an image processing operation to each pixel of the processing area (Zt), depending on the value of intensity of the coinciding pixel of the digital mask (Mi).
The invention concerns a method for measuring the glass thickness distribution in glass containers (2) at a high temperature. According to the invention, the method comprises the following steps: choosing at least one inspection area on the container (2), such that the thickness relationship of the glass on the basis of the intensity of the infrared radiation is homogeneous over the whole of said inspection area (Z), measuring, for each inspection area, the thickness of the glass of the container at at least one measurement point belonging to the inspection area, using a contact-free point system (11) for measuring thickness, using a sensor sensitive to infrared radiation (6) to measure the infrared radiation emitted by the container (2), determining, for each inspection area, a relationship between the thickness measurement taken at the measurement point and the infrared radiation, and determining the glass distribution of the container at each inspection area from said relationship and from the infrared radiation on each inspection area.
G01B 21/08 - Measuring arrangements or details thereof, where the measuring technique is not covered by the other groups of this subclass, unspecified or not relevant for measuring length, width, or thickness for measuring thickness
G01N 21/90 - Investigating the presence of flaws, defects or contamination in a container or its contents
The invention relates to an optical method for inspecting articles made from transparent or translucent materials using a vision system, the method consisting: - of illuminating the articles by means of a light source whereof the angular spectrum is adapted to the contrast chosen for refracting objects present in the articles, - of recovering, by means of an image sensor, the light having passed through the articles, in order to form images of said articles. According to the invention, the method consists; * during a phase of referencing the vision system: - of placing a reference standard (20) comprising at least one reference object (21) refracting light according to a known range of angles in the field of vision of the image sensor, - of taking at least one image of the reference standard (20) in such a way as to measure at least the contrast in the image produced by at least one reference object (21), * and during at least one phase of qualifying the vision system: - of once more placing the reference standard (20) in front of the light source and in the field of vision of the image sensor.
The invention relates to a method for measuring the inner diameter of a hollow body (2). According to the invention: the hollow body (2) is illuminated, on one side thereof, by a diffuse light source (9) having two light boundaries (91, 92) spaced apart along the axis of measurement (x) so as to produce, in one image, two diametrically opposed light transitions that are spaced apart from one another; the light rays reflected and refracted by the hollow body (2) are recovered from the side of the hollow body opposite the illuminated side, so as to form at least one image which contains at least the two light transitions; and the image is processed in order to determine the distance between the two light transitions, with a view to determining the measurement of the inner diameter of the hollow body.
The present invention relates to a device (1) for checking the size of a container (2) having a lip (3), comprising a head (4) for gauging the size of the lip (3) of the container, said head being mounted onto a supporting frame (22) and including an outer gauge (5) and an inner gauge (6), the gauging head being movable along a vertical axis (Z-Z') aligned with the axis of the lip (3) of the container (2) to be checked so as to bear, via the outer gauge thereof, on a top surface of the lip in order to check the height of the container while the inner gauge (6) simultaneously passes through the lip (3) of the container. Said device also comprises: a mechanism for reciprocatingly moving the gauging head along the vertical axis (Z-Z'); and a first means for detecting the position of the outer gauge of the gauging head at the moment said outer gauge contacts the lip (3) of the container (2). Said checking device (1) finally comprises a second means (9, 10, 12) for detecting the positional deviation of the inner gauge (6) relative to the outer gauge (5).
G01B 5/08 - Measuring arrangements characterised by the use of mechanical techniques for measuring diameters
G01B 7/12 - Measuring arrangements characterised by the use of electric or magnetic techniques for measuring diameters
G01B 11/08 - Measuring arrangements characterised by the use of optical techniques for measuring diameters
G01B 21/10 - Measuring arrangements or details thereof, where the measuring technique is not covered by the other groups of this subclass, unspecified or not relevant for measuring diameters
12.
METHOD AND DEVICE FOR MEASURING THE VERTICALITY OF A CONTAINER
The invention relates to a method for measuring the verticality of a container (2) having a base (3) from which a vertical wall (4) rises. According to the invention, the method involves: measuring, at each rotational position of the container (2), at least the position, along a first measurement axis (YA), of at least one first measuring point (PA) located on the base (3) and of a second measuring point (PB) located on the base diametrically opposite the first measuring point, and the position, along a third measurement axis (XC), of at least one third measuring point (PC) located on the vertical wall (4) spaced apart from the base (3); selecting an angle defined between a first segment passing through the first (PA) and second (PB) measurement points and a second segment intersecting the first segment and passing at least through the third measurement point (PC), such that the variation of said angle is representative of the verticality of the container (2); calculating, for each rotational position of the container (2), a quantity dependent on said angle; and measuring the verticality on the basis of the variations in the quantity dependent on said angle.
B07C 5/12 - Sorting according to size characterised by the application to particular articles, not otherwise provided for
G01B 11/26 - Measuring arrangements characterised by the use of optical techniques for testing the alignment of axes
G01N 21/90 - Investigating the presence of flaws, defects or contamination in a container or its contents
B65B 57/02 - Automatic control, checking, warning or safety devices responsive to absence, presence, abnormal feed, or misplacement of binding or wrapping material, containers, or packages
13.
METHOD AND DEVICE FOR DETECTING DEFECTS IN MATERIAL DISTRIBUTION IN TRANSPARENT CONTAINERS
The invention relates to an inspection method for detecting thin defects on transparent containers (2) having a central axis (A), the method comprising, for a series of inspection points distributed over an inspection region in a stacked manner according to a predetermined height of the container taken along the central axis (A) and along the circumference of the container: sending a light beam (9) so as to collect, on a light sensor (16), the beams reflected (12, 11) by the inner (6) and outer (5) surfaces of the wall of the container; measuring, at each inspection point, the thickness of the wall (3) according to the separation, at the light sensor (16), between the beams reflected by the inner and outer surfaces; and processing the thickness measurements by analysing the distribution thereof over the inspection region in order to extract the geometric features thereof, and comparing said geometric features with reference values in order to determine whether the container has a defect in the material distribution thereof.
The invention relates to a device for inspecting the rings and necks of containers, comprising a movable element (6) provided with an outer gauge (14) for checking the outside of the ring of the containers, and an inner gauge (15) for checking the inside of the ring and neck of the containers. According to the invention, the movable element comprises: a system for measuring the position of the movable element (6) relative to the frame; a system (35) for detecting the contact between the inner gauge (15) and the container; a system (37) for detecting the contact between the outer gauge (14) and the container; and a processing unit for determining, on the basis of the measurements of the position of the movable element (6) and of the instances of contact between the gauges (14, 15) and the container, whether or not the size of the rings and/or necks of the containers are acceptable, and the types of defects for the containers the sizes of the rings and/or necks of which are not acceptable.
G01B 5/08 - Measuring arrangements characterised by the use of mechanical techniques for measuring diameters
G01B 7/12 - Measuring arrangements characterised by the use of electric or magnetic techniques for measuring diameters
G01B 21/10 - Measuring arrangements or details thereof, where the measuring technique is not covered by the other groups of this subclass, unspecified or not relevant for measuring diameters
15.
METHOD AND EQUIPMENT FOR DETECTING THE PRESENCE AND EXTENT OF DEFECTS IN AN OPTICAL COMPONENT
The invention relates to a method for detecting the presence and the extent of defects in an optical component (2) to be monitored, said method involving: producing a periodic light pattern (7) that is transmitted through the optical component (2); successively acquiring, during the transmission through the component, images of the periodic pattern that is phase-shifted at each acquisition; calculating the phase images on the basis of said successive images; and analyzing said phase images so as to derive therefrom the presence of defects in the component. According to the invention, the method involves: recording the successive image series by means of at least two cameras (Cl, Cr) that form a stereoscopic system and can be pointed in various directions so as to obtain at least two phase images respectively corresponding to at least two pointing directions, for a defect that is detected and located on one of the at least two phase images; locating the same defect on at least one other phase image; and determining, according to the positions of the defect located on at least two phase images, the extent of the defect in the optical component.
G01B 11/25 - Measuring arrangements characterised by the use of optical techniques for measuring contours or curvatures by projecting a pattern, e.g. moiré fringes, on the object
patents
