The invention relates to a load detection unit having a spring-elastic load carrier assembly for receiving the load (10) and a sensor (3) for the deformation of the load carrier assembly, which occurs under the load (10) that is to be detected, wherein a deformation transmission unit (6) is operatively arranged between the load carrier assembly and the sensor (3). A method, in which additionally a deformation transmission unit is used, is thus provided, which during operation picks up the deformation of the load carrier assembly and transmits it to the sensor as a changed force/path load.
G01L 1/04 - Measuring force or stress, in general by measuring elastic deformation of gauges, e.g. of springs
G01L 1/10 - Measuring force or stress, in general by measuring variations of frequency of stressed vibrating elements, e.g. of stressed strings
G01L 1/22 - Measuring force or stress, in general by making use of electrokinetic cells, i.e. liquid-containing cells wherein an electrical potential is produced or varied upon the application of stress using resistance strain gauges
G01L 5/00 - Apparatus for, or methods of, measuring force, work, mechanical power, or torque, specially adapted for specific purposes
G01L 5/10 - Apparatus for, or methods of, measuring force, work, mechanical power, or torque, specially adapted for specific purposes for measuring tension in flexible members, e.g. ropes, cables, wires, threads, belts or bands using electrical means
2.
VIBRATING WIRE SENSOR AND VIBRATING WIRE FOR A VIBRATING WIRE SENSOR
The invention relates to a vibrating wire sensor (20, 30, 40 and 50) having a vibrating wire (21, 31, 41 and 51), which is tensioned accordingly differently under measurement conditions of a current factor to be detected, and having an exciter arrangement for exciting the vibrating wire (21, 31, 41 and 51) in the range of the respective natural frequency thereof, wherein the exciter arrangement has at least one exciter layer (22, 32, 42 and 52) provided on a longitudinal portion of the vibrating wire (21, 31, 41 and 51), having a piezoelectric activation layer (33, 46 and 54), which has a different length depending on the activation state, and thus creates a correspondingly different vibration position of the vibrating wire (21, 31, 41 and 51). A vibrating wire sensor can thus be designed to be more robust, wherein the power consumption is additionally considerably less. The invention further relates to a vibrating wire having an exciter layer (22, 32, 42 and 52), which has a piezoelectric activation layer.
G01L 1/10 - Measuring force or stress, in general by measuring variations of frequency of stressed vibrating elements, e.g. of stressed strings
G01L 1/16 - Measuring force or stress, in general using properties of piezoelectric devices
G01L 5/04 - Apparatus for, or methods of, measuring force, work, mechanical power, or torque, specially adapted for specific purposes for measuring tension in flexible members, e.g. ropes, cables, wires, threads, belts or bands
3.
METHOD AND DEVICE FOR DETECTING THE WEIGHT OF A LOAD MOVING ON SCALES
The invention relates to a method for calculating the weight of a load moving on scales (1). According to the method, a load signal of the scales is determined over a period of time using the speed of the load, and several partial load signals (TL1, TL2) are used, the total thereof providing the load signal, a first partial load signal (TL1) displaying a maximum value as long as the load is fully on the weighing section of the scales (1), and a second partial load signal (TL2) displaying a minimum value as long as the load is completely removed from the weighing section of the scales (1), and the speed of the movement of the load is determined from said partial load signals (TL1 and TL2). The invention also relates to scales for carrying out said method, comprising two weighing units (10, 11) with flexible deformation elements on which deformation sensors (7, 15), which generate the partial load signals (TL1,TL2), are arranged.
G01G 19/02 - Weighing apparatus or methods adapted for special purposes not provided for in groups for weighing wheeled or rolling bodies, e.g. vehicles
A storage system (1) has a detection arrangement for sensing stored goods stored in the storage area, preferably in the form of scales 3, and a computer (11) which is operationally connected to the detection arrangement and is intended to continue a stock list. The detection arrangement is designed to detect a change in the quantity of stored goods in the storage area, to generate a corresponding mutation signal and to transmit said signal to the computer (11). Identification means (8) which are operationally connected to the computer and are intended to detect a code are also provided and are designed to generate a detection signal if a code is detected and to transmit said signal to the computer (11). As a result, the computer can assign the detection signal to the mutated stored goods during operation, can record said signal in a stock list and can thus log which person has removed how many storage units from the store or introduced how many storage units into the store and when.
The invention relates to an elastically deformable load bearing structure comprising a measuring assembly for gauging the size of a load (12) acting on the load bearing structure (1, 15, 40, 60) in a loadable section (3). The structure also comprises a mechanical transmission element embodied as a rod (8), extending from the loadable section (3) to a measuring section (5) of the load bearing structure (1, 15, 40, 60), and operationally interacting with a sensor (6) arranged on the measuring section (5).
G01G 1/18 - Balances involving the use of a pivoted beam, i.e. beam balances
G01G 21/16 - Beams of composite construction; Connections between different beams
G01L 5/00 - Apparatus for, or methods of, measuring force, work, mechanical power, or torque, specially adapted for specific purposes
G01G 19/12 - Weighing apparatus or methods adapted for special purposes not provided for in groups for incorporation in vehicles having electrical weight-sensitive devices
G01G 19/18 - Weighing apparatus or methods adapted for special purposes not provided for in groups for weighing suspended loads having electrical weight-sensitive devices
6.
METHOD AND DEVICE FOR MEASURING THE WEIGHT OF A LOAD TO BE HOISTED ONTO A LOADING AREA
The invention relates to a method and device for measuring the weight of a load that is moved by means of a load-lifting apparatus over the edge of a raised loading area and pulled up onto said loading area or pushed down from the loading area, wherein during said operation the instantaneous force resulting from the movement of the load is measured while passing through a predetermined weighing window in a support of the load-lifting apparatus loaded by the load, and the weight of the load is computed from the force progression thereof. The load sensor is preferably designed as a pipe section that is provided with two deformation sensors that are provided substantially at a right angle to each other.
G01G 19/12 - Weighing apparatus or methods adapted for special purposes not provided for in groups for incorporation in vehicles having electrical weight-sensitive devices
The invention relates to a load measuring element for the braces of a machine in order to determine the force transmitted by the load measuring element, comprising a carrier element which can be exposed to the force by way of a force introduction element and in turn rests on a support. The force introduction element, the carrier element, and the support interact with each other during operation such that the carrier element flexibly deforms under the weight load, wherein a measurement element is provided for determining said flexible deformation. In this way, an associated height adjustment can be specifically activated in order to adjust the machine such that it can be set up without impermissible distortion of the frame.
B23Q 1/00 - Members which are comprised in the general build-up of a form of machine, particularly relatively large fixed members
F16M 7/00 - FRAMES, CASINGS OR BEDS OF ENGINES, MACHINES OR APPARATUS, NOT SPECIFIC TO ENGINES, MACHINES OR APPARATUS PROVIDED FOR ELSEWHERE; STANDS; SUPPORTS - Details of attaching or adjusting engine beds, frames, or supporting-legs on foundation or base; Attaching non-moving engine parts, e.g. cylinder blocks
The invention relates to a dynamic scale for bulk material, having two swivel arms (2) and two load-lifting arms (8) mounted to the free end of said swivel arms, with one hole (7) being located in each of the swivel arms (2) and positioned transversely to the extension of the swivel arm and also transversely to the neutral fiber brought about by the flexural load. A pipe (9) is fitted into the hole (7) and is welded thereto. The pipe (9) comprises two sensors (14, 15) transversely to the longitudinal axis thereof, said sensors being located at an angle of substantially 90° to each other and each being disposed at an angle of ± 45° to the direction of the shear stress component τxy. Under the influence of the shear stress, the cross section of the tube (9) is deformed into an ellipse that is inclined at about 45°, the shorter and longer axis (11, 13) thereof being measured using the sensors (14, 15). Said sensors (14, 15) each comprise two force inlets (16, 17), which are inserted with pretension in suitable recesses in the tube (9).
The apparatus for determining the filling level of silos (1) has at least three tubular supports (5) with a round cross section. At least one of these supports (5) has a sensor which determines the changes in the diameter of this support (5) and uses them to ascertain the axial load. The further supports (5) concomitantly have converters (15) with computers (20). In this case, a tension or pressure element (8) obliquely penetrates the support (5) at an angle α. Since the elastic longitudinal compression is approximately three times as great as the transverse elongation on the basis of the Poisson relationship, additional load on the support (5) results in the tension or pressure element (8) being relieved. If the supports (5) are cooled rapidly, the tension or pressure element (8) initially remains at the original temperature and length. This results in the converters (15) interpreting this as relief of the silo (1). Those sensors which measure the diameters of the supports (5) interpret this in the same manner. Discriminator or differential circuits can be respectively used to distinguish whether these short-term changes in load take place on account of transient changes in temperature or are real changes in load.
G01G 3/12 - Weighing apparatus characterised by the use of elastically-deformable members, e.g. spring balances wherein the weighing element is in the form of a solid body stressed by pressure or tension during weighing
G01G 21/23 - Support or suspension of weighing platforms
The bulk material scales, according to the invention, is arranged on a refuse collection vehicle (1) and has two swivel arms (2) which are mounted in swivel joints (4) and can each be moved by means of a hydraulic cylinder (3). Attached to the front end of the swivel arms (2), there are load lifting arms (8) for lifting up refuse containers (5). In addition, the swivel arms (2) each bear two strain sensors (7a, b) at coresponding intervals. The difference in the bending strains measured by the strain sensors (7a, b), divided by the distance x of the strain sensor (7a) from the refuse container load, essentially gives the weight of the load being lifted. Attached to the cited forward free end of the swivel arms (2), there is at least one acceleration sensor (6) for measuring both the dynamic acceleration and also the angular position of the refuse container (5) and of the refuse collection vehicle (1). An analysis unit (10), preferably located in the driver's cabin of the refuse collection vehicle (1), carries out all types of arithmetic operations.
Counting scale with a multilevel Hinkley detector that can recognize the jumps of a very noisy signal s(t) from an average value (standard level) to a new average value. The measured signal s(t) is tested for several hypothetical jump sizes m1 at the same time. A test value h1(t) is established for every jump size using a nonlinear recursive algorithm. By recognizing which test value h1(t) first reaches a threshold value &egr;, the number of parts that have been added and if necessary removed can be determined.
G01G 19/42 - Weighing apparatus or methods adapted for special purposes not provided for in groups with provisions for indicating, recording, or computing price or other quantities dependent on the weight for counting by weighing
The invention relates to silo scales which comprise at least three tubular supports (5), especially for retrofitting existing silos (1) and for determining the filling level of such silos. The invention is based on the principle that a tubular support is exposed to a reversible elongation of its diameter by an axial force. For this purpose, every support (5) is provided with a longitudinal slot (6) that extends in parallel to its axis and with a hole (8) that extends at an angle to the plane of the longitudinal slot (6) and through the diameter of the support (5). A connecting rod (9) extends through the hole (8) and is secured by a nut (15) on one end. It is non-positively fastened on the other end in a measuring cell (10) that rests against the exterior of the support (5). The measuring cell is enclosed by a measuring cell housing (7). The weight of the silo (1) reversibly expands the slot (6) to a degree that is substantially proportional to the weight, thereby exerting a corresponding force on the connecting rod (9), which force is transmitted to the measuring cell (10) and measured. A cable (11) is used for power supply and signal connection.
G01G 3/12 - Weighing apparatus characterised by the use of elastically-deformable members, e.g. spring balances wherein the weighing element is in the form of a solid body stressed by pressure or tension during weighing
G01G 21/23 - Support or suspension of weighing platforms
patents
