CN110726466A - Multi-station creep calibration device and method - Google Patents
Multi-station creep calibration device and method Download PDFInfo
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- CN110726466A CN110726466A CN201910812754.XA CN201910812754A CN110726466A CN 110726466 A CN110726466 A CN 110726466A CN 201910812754 A CN201910812754 A CN 201910812754A CN 110726466 A CN110726466 A CN 110726466A
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- 238000000034 method Methods 0.000 title claims abstract description 21
- 238000005303 weighing Methods 0.000 claims abstract description 94
- 238000011084 recovery Methods 0.000 claims description 12
- 230000003139 buffering effect Effects 0.000 claims description 9
- 238000005259 measurement Methods 0.000 claims description 8
- 230000003993 interaction Effects 0.000 claims description 7
- 230000035945 sensitivity Effects 0.000 claims description 6
- 230000003111 delayed effect Effects 0.000 claims description 3
- 230000000149 penetrating effect Effects 0.000 claims description 3
- 230000002093 peripheral effect Effects 0.000 claims description 3
- 238000001514 detection method Methods 0.000 description 2
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01G—WEIGHING
- G01G23/00—Auxiliary devices for weighing apparatus
- G01G23/01—Testing or calibrating of weighing apparatus
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Abstract
The invention discloses a multi-station creep calibration device and a multi-station creep calibration method, and the multi-station creep calibration device comprises a support and a plurality of creep calibration units, wherein the support comprises a top plate and a working plate which are arranged in parallel, the top plate and the working plate are fixedly connected through a plurality of connecting rods, a plurality of supporting rods are fixedly arranged on the bottom surface of the working plate, each creep calibration unit comprises a lifting driving device, a buffer mechanism and a loading mechanism, each buffer mechanism comprises a connecting body and a buffer frame, each buffer frame is provided with a first through hole, the middle part of each connecting body penetrates through the corresponding first through hole, two ends of each connecting body cannot penetrate through the corresponding first through hole, the fixed end of each lifting driving device is hinged to the top plate, the lifting driving end of each lifting driving device is fixedly connected with the corresponding connecting body, each loading mechanism is fixedly connected with each buffer frame. The creep calibration work of a plurality of weighing sensors can be completed at one time, the creep calibration efficiency is improved, and the stability of the calibration process is high.
Description
Technical Field
The invention relates to the technical field of sensor detection, in particular to a multi-station creep calibration device and method.
Background
Creep of a load cell refers to the characteristic of the sensor that, in a constant operating environment and other variable quantities remain constant, the electrical signal output by the sensor changes over time as the constant load is rapidly applied and rapidly removed. The normal temperature creep and zero return performance are important indexes for measuring the quality of the beam type weighing sensor, and each sensor has to detect the creep parameters and zero return parameters when leaving a factory so as to judge whether the product is qualified or not, and the product can be put into the market after being qualified.
The calibration work of the factory parameters of the weighing sensor belongs to batch production operation, and the test parameters are required to be accurate and efficient. At present, most of the conventional creep calibration devices for weighing sensors are calibrated by a single machine, each device can only calibrate one sensor at a time, a digital display meter is used for data measurement, manual recording and judgment are adopted, the delay of test parameters is long, the calibration process of the calibration device is poor in stability, and the efficiency is low.
Disclosure of Invention
The invention aims to provide a multi-station creep calibration device and method, which are used for solving the problems in the prior art, can finish creep calibration work of a plurality of weighing sensors at one time, improve creep calibration efficiency and have high stability in a calibration process.
In order to achieve the purpose, the invention provides the following scheme:
the invention provides a multi-station creep deformation calibration device, which comprises a bracket and a plurality of creep deformation calibration units, wherein the bracket comprises a top plate and a working plate which are arranged in parallel, the top plate and the working plate are fixedly connected through a plurality of connecting rods, a plurality of supporting rods are fixedly arranged on the bottom surface of the working plate, each creep deformation calibration unit comprises a lifting driving device, a buffer mechanism and a loading mechanism, the buffer mechanism comprises a connecting body and a buffer frame, a first through hole is arranged on the buffer frame, the middle part of the connecting body penetrates through the first through hole, both ends of the connecting body cannot penetrate through the first through hole, the connecting body can move up and down and rotate in the first through hole, the fixed end of the lifting driving device is hinged on the top plate, the lifting driving end of the lifting driving device is fixedly connected with the connecting body, and the loading mechanism is fixedly connected with the buffer, and the loading mechanism is positioned below the buffer frame, a weight tray is fixedly arranged at the bottom end of the loading mechanism, the weight tray is positioned below the working plate, weights are placed on the weight tray, a weighing sensor is placed on the working plate, and the lifting driving device can drive the loading mechanism to be pressed on the weighing sensor and ensure that no interaction force is generated between the connecting body and the buffer frame.
Preferably, a connecting hole is formed in the fixed end of the lifting driving device, a connecting seat is arranged on the bottom surface of the top plate, and the lifting driving device is hinged to the connecting seat through a hollow connecting pipe penetrating through the connecting hole and the connecting seat.
Preferably, the periphery of the top plate is fixedly connected with two connecting rods, the middle of the top plate is fixedly connected with one connecting rod, each connecting rod is in threaded connection with an upper nut and a lower nut, and the top plate is clamped and fixed by the upper nut and the lower nut.
Preferably, the buffer frame comprises a first vertical rod and a first transverse plate, two ends of the first transverse plate are respectively fixedly connected with the top end of the first vertical rod, and the first through hole is formed in the center of the first transverse plate.
Preferably, the connecting body comprises an upper connecting piece and a lower connecting piece, the upper connecting piece is provided with a through first threaded hole, one end of the lower connecting piece is provided with a first screw rod matched with the first threaded hole, and a lifting driving end of the lifting driving device is provided with a second screw rod matched with the first threaded hole.
Preferably, the loading mechanism comprises a second vertical rod, a second transverse plate and a third transverse plate, two ends of the second transverse plate are respectively fixedly connected with the top end of the second vertical rod, two ends of the third transverse plate are respectively fixedly connected with the bottom end of the second vertical rod, the working plate is provided with a plurality of second through holes, the second vertical rod respectively penetrates through one of the second through holes, and the bottom end of the first vertical rod is fixedly connected to the second transverse plate.
Preferably, a second threaded hole is formed in the center of the third transverse plate, a connecting rod is fixedly arranged on the weight tray, and external threads matched with the second threaded hole are formed in the peripheral surface of the top end of the connecting rod.
Preferably, still include sensor anchor clamps, sensor anchor clamps are used for placing on the working plate, sensor anchor clamps include punch holder and lower plate, the punch holder with the lower plate passes through bolt fastening centre gripping weighing sensor, the lower plate top surface is equipped with the locating piece, the locating piece is used for the horizontal position of weighing sensor to fix a position, the punch holder top surface is equipped with the arcuation recess, second diaphragm bottom surface is equipped with the arcuation arch, lift drive arrangement's lift drive end can drive the arcuation arch is pressed in the arcuation recess.
Preferably, the four corners of the bottom surface of the working plate are respectively and fixedly provided with one supporting rod, each supporting rod is a hollow rod, and the bottom surface of each supporting rod is fixedly provided with a supporting base.
The invention also provides a multi-station creep calibration method, and the multi-station creep calibration device comprises the following steps:
(1) sensor preloading: carrying out three times of preloading on each weighing sensor to be tested, calculating the zero point error and the sensitivity of each weighing sensor after each time of loading is finished, and selecting the weighing sensors with qualified zero point errors and sensitivities;
(2) creep loading: placing a weighing sensor on the working plate at a position corresponding to each loading mechanism, adjusting the lifting driving device to enable each loading mechanism to press each weighing sensor until no interaction force is generated between each connecting body and each buffer frame, and completing loading;
(3) calculating a creep error value: after the loading is finished, recording the loading initial value of each weighing sensor, measuring the loading output value of each weighing sensor every 5min, stopping the measurement until 30min later, recording the loading output value of each weighing sensor according to time intervals, and calculating the difference value between each loading output value and each loading initial value to obtain the creep error value of each weighing sensor;
(4) and (3) creep unloading: after each weighing sensor is loaded for 30min and delayed for 1min, adjusting each lifting driving device to enable each loading mechanism to be far away from each weighing sensor, and completing unloading;
(5) calculating a creep recovery error value: after unloading is finished, measuring unloading initial values of the weighing sensors, measuring the unloading output values of the weighing sensors every 5min until 30min stops, recording the unloading output values of the weighing sensors according to time intervals, and calculating the difference value between each unloading output value and each unloading initial value to obtain creep recovery error values of the weighing sensors;
(6) judging whether the weighing sensor is qualified or not: and according to the creep error value and the creep recovery error value of the weighing sensor, whether the grade of the weighing sensor is qualified or not is divided according to the national standard.
Compared with the prior art, the invention has the following technical effects:
the invention provides a multi-station creep calibration device and a method, wherein a lifting driving device is arranged in each creep calibration unit, the lifting driving device can drive a loading mechanism weighing sensor to carry out creep loading and creep unloading, a creep error value and a creep recovery error value of the weighing sensor are obtained through measurement and calculation, and the grade of the weighing sensor is divided according to the national standard to determine whether the grade is qualified or not; through setting up a plurality of creep calibration units, can once only accomplish a plurality of weighing sensor's demarcation work, improve creep calibration efficiency, through buffer gear's setting, improved the stability of demarcation process, take place to twist reverse when can avoiding lift drive arrangement reciprocating motion and make multistation creep calibration device atress inhomogeneous, improve weighing sensor creep test's precision and accuracy.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings without creative efforts.
FIG. 1 is a front view of a multi-station creep calibration apparatus provided in the present invention;
FIG. 2 is a schematic view of a connecting structure of the connecting member and the buffer frame;
FIG. 3 is an exploded view of the connector of FIG. 2;
FIG. 4 is a schematic view of a connection structure between the lifting driving device and the connecting base;
FIG. 5 is a schematic structural view of a buffer frame and a loading mechanism;
FIG. 6 is a schematic view of the lower plate;
FIG. 7 is a schematic view of the upper plate;
in the figure: 1-bracket, 2-top plate, 3-working plate, 4-connecting rod, 5-supporting rod, 6-lifting driving device, 7-buffering mechanism, 8-loading mechanism, 9-base, 10-lifting rod, 11-connector, 12-buffering frame, 13-first through hole, 14-weight tray, 15-connecting seat, 16-hollow connecting tube, 17-upper nut, 18-lower nut, 19-first vertical rod, 20-first transverse plate, 21-upper connecting piece, 22-lower connecting piece, 23-second vertical rod, 24-second transverse plate, 25-third transverse plate, 26-connecting rod, 27-upper clamping plate, 28-lower clamping plate, 29-positioning block, 30-groove, 31-arc-shaped protrusion, 32-support base, 33-weighing sensor and 34-weight.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The invention aims to provide a multi-station creep calibration device and method, which are used for solving the problems in the prior art, can finish creep calibration work of a plurality of weighing sensors at one time, improve creep calibration efficiency and have high stability in a calibration process.
In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in further detail below.
As shown in fig. 1-2, this embodiment provides a multi-station creep calibration device, which includes a support 1 and a plurality of creep calibration units, where the support 1 includes a top plate 2 and a working plate 3 that are arranged in parallel, the top plate 2 and the working plate 3 are fixedly connected through a plurality of connecting rods 4, a plurality of supporting rods 5 are fixedly disposed on the bottom surface of the working plate 3, each creep calibration unit includes a lifting driving device 6, a buffering mechanism 7 and a loading mechanism 8, the buffering mechanism 7 includes a connecting body 11 and a buffering frame 12, a first through hole 13 is disposed on the buffering frame 12, a first through hole 13 is disposed in the middle of the connecting body 11, both ends of the connecting body 11 cannot pass through the first through hole 13, the connecting body 11 can move up and down and rotate in the first through hole 13, a fixed end of the lifting driving device 6 is hinged to the top plate 2, a lifting driving end of the lifting driving device 6 is fixedly connected, the loading mechanism 8 is located below the buffer frame 12, the weight tray 14 is fixedly arranged at the bottom end of the loading mechanism 8, the weight tray 14 is located below the working plate 3, the weight tray 14 is used for placing weights 34, the working plate 3 is used for placing the weighing sensor 33, and the lifting driving device 6 can drive the loading mechanism 8 to press the weighing sensor 33 and enable the connecting body 11 and the buffer frame 12 not to generate interaction force.
The weighing sensor 33 is arranged on the working plate 3, the loading mechanism 8 is driven to move downwards by the extension of the lifting driving end of the lifting driving device 6, after the loading mechanism 8 is pressed on the weighing sensor 33, the lifting driving end of the lifting driving device 6 is continuously extended, so that no interaction force is generated between the connecting body 11 and the buffer frame 12, the lifting driving device 6 stops running, the loading weight of the weighing sensor 33 can be changed by loading the weight 34 on the weight tray 14, the expected loading weight is achieved, the creep error value of the weighing sensor 33 is obtained by measurement and calculation, the lifting driving end of the lifting driving device 6 is contracted, the loading mechanism 8 is driven to move upwards, so that the loading mechanism 8 is separated from the weighing sensor 33, the purpose of unloading the weighing sensor 33 is realized, and the creep recovery error value of the weighing sensor 33 is obtained by measurement and calculation, whether the grade of the weighing sensor 33 is qualified or not is classified according to the national standard; through setting up a plurality of creep calibration units, can once only accomplish the demarcation work of a plurality of weighing sensor 33, improve creep calibration efficiency, through buffer gear 7's setting, improved the stability of demarcation process, take place to twist reverse when can avoiding 6 reciprocating motion of lift drive and make multistation creep calibration device atress inhomogeneous, improve the precision and the accuracy of weighing sensor 33 creep test.
As shown in fig. 4, the fixed end of the lifting driving device 6 is provided with a base 9, the base 9 is provided with a connecting hole, the bottom surface of the top plate 2 is provided with a connecting seat 15, the base 9 is hinged on the connecting seat 15 by a hollow connecting pipe 16 penetrating through the connecting hole and the connecting seat 15, the structure is simple, the disassembly is convenient, the consumption cost of materials can be reduced by the arrangement of the hollow connecting pipe 16, and the weight is reduced.
As shown in fig. 1, two connecting rods 4 are fixedly connected to the periphery of the top plate 2, one connecting rod 4 is fixedly connected to the middle of the top plate 2, an upper nut 17 and a lower nut 18 are connected to each connecting rod 4 in a threaded manner, the top plate 2 is clamped and fixed by the upper nut 17 and the lower nut 18, vibration in a creep loading process can be reduced, deformation of the top plate 2 is reduced, loading stability is improved, each connecting rod 4 is a hollow rod, material consumption cost is reduced, and weight is reduced.
As shown in fig. 2 and 5, the buffer frame 12 includes a first vertical rod 19 and a first horizontal plate 20, two ends of the first horizontal plate 20 are respectively fixedly connected to a top end of the first vertical rod 19, and the first through hole 13 is disposed at the center of the first horizontal plate 20.
As shown in fig. 2 to 3, the connecting body 11 includes an upper connecting member 21 and a lower connecting member 22, the upper connecting member 21 is provided with a first threaded hole, one end of the lower connecting member 22 is provided with a first screw rod matched with the first threaded hole, a lifting driving end of the lifting driving device is provided with a lifting rod 10, and the end of the lifting rod 10 is provided with a second screw rod matched with the first threaded hole.
As shown in fig. 1 and 5, the loading mechanism 8 includes a second vertical rod 23, a second horizontal plate 24 and a third horizontal plate 25, two ends of the second horizontal plate 24 are respectively fixedly connected to a top end of the second vertical rod 23, two ends of the third horizontal plate 25 are respectively fixedly connected to a bottom end of the second vertical rod 23, the working plate 3 is provided with a plurality of second through holes, each second vertical rod 23 respectively passes through one second through hole, and a bottom end of each first vertical rod 19 is fixedly connected to the second horizontal plate 24.
A second threaded hole is formed in the center of the third transverse plate 25, a connecting rod 26 is fixedly arranged on the weight tray 14, and an external thread matched with the second threaded hole is formed on the peripheral surface of the top end of the connecting rod 26.
In this embodiment, still include sensor anchor clamps, sensor anchor clamps are used for placing on working plate 3, sensor anchor clamps include punch holder 27 and lower plate 28, punch holder 27 and lower plate 28 pass through bolt fastening centre gripping weighing sensor, the lower plate 28 top surface is equipped with locating piece 29, locating piece 29 is used for the horizontal position of weighing sensor to fix a position, punch holder 27 top surface is equipped with arcuation recess 30, second diaphragm 24 bottom surface is equipped with arcuation arch 31, lift drive arrangement's lift drive end can drive arcuation arch 31 and press in arcuation recess 30. The heavy sensor 33 is convenient to position and fix, and the weighing sensor 33 is convenient to load, so that the weighing sensor 33 is more uniformly stressed, and the data measurement is more accurate.
3 bottom surface four corners departments of working plate respectively fixedly are equipped with a bracing piece 5, and each bracing piece 5 is hollow pole, and 5 bottom surfaces of each bracing piece are all fixed and are equipped with one and support base 32, set up bracing piece 5 into hollow pole and can lighten weight, set up support base 32, can improve the stability of supporting.
According to the national standard GBT 7551-2008 weighing sensor and the international suggestion (2000) of OIML R60, a creep parameter calibration detection process of the weighing sensor is designed, and calibration is carried out according to two indexes of creep error and creep recovery error of a national standard weighing sensor, so as to measure whether the weighing sensor is qualified or not.
The multi-station creep calibration method adopting the multi-station creep calibration device comprises the following steps: the method comprises the following steps:
(1) sensor preloading: carrying out three times of preloading on each weighing sensor to be tested, calculating the zero point error and the sensitivity of each weighing sensor after each time of loading is finished, and selecting the weighing sensors with qualified zero point errors and sensitivities;
(2) creep loading: placing a weighing sensor on the working plate at a position corresponding to each loading mechanism, adjusting the lifting driving device to enable each loading mechanism to press each weighing sensor until no interaction force is generated between each connecting body and each buffer frame, and completing loading;
(3) calculating a creep error value: after the loading is finished, recording the loading initial value of each weighing sensor, measuring the loading output value of each weighing sensor every 5min, stopping the measurement until 30min later, recording the loading output value of each weighing sensor according to time intervals, and calculating the difference value between each loading output value and each loading initial value to obtain the creep error value of each weighing sensor;
(4) and (3) creep unloading: after each weighing sensor is loaded for 30min and delayed for 1min, adjusting each lifting driving device to enable each loading mechanism to be far away from each weighing sensor, and completing unloading;
(5) calculating a creep recovery error value: after unloading is finished, measuring unloading initial values of the weighing sensors, measuring the unloading output values of the weighing sensors every 5min until 30min stops, recording the unloading output values of the weighing sensors according to time intervals, and calculating the difference value between each unloading output value and each unloading initial value to obtain creep recovery error values of the weighing sensors;
(6) judging whether the weighing sensor is qualified or not: and according to the creep error value and the creep recovery error value of the weighing sensor, whether the grade of the weighing sensor is qualified or not is divided according to the national standard.
The principle and the implementation mode of the invention are explained by applying a specific example, and the description of the embodiment is only used for helping to understand the method and the core idea of the invention; meanwhile, for a person skilled in the art, according to the idea of the present invention, the specific embodiments and the application range may be changed. In view of the above, the present disclosure should not be construed as limiting the invention.
Claims (10)
1. The utility model provides a multistation creep calibration device which characterized in that: the creep deformation calibration device comprises a support and a plurality of creep deformation calibration units, wherein the support comprises a top plate and a working plate which are arranged in parallel, the top plate is fixedly connected with the working plate through a plurality of connecting rods, a plurality of supporting rods are fixedly arranged on the bottom surface of the working plate, each creep deformation calibration unit comprises a lifting driving device, a buffering mechanism and a loading mechanism, the buffering mechanism comprises a connecting body and a buffering frame, a first through hole is formed in the buffering frame, the middle of the connecting body penetrates through the first through hole, the two ends of the connecting body cannot penetrate through the first through hole, the connecting body can move up and down and rotate in the first through hole, the fixed end of the lifting driving device is hinged on the top plate, the lifting driving end of the lifting driving device is fixedly connected with the connecting body, the loading mechanism is fixedly connected with the buffering frame, and the loading mechanism is positioned below the, the bottom end of the loading mechanism is fixedly provided with a weight tray, the weight tray is positioned below the working plate, weights are placed on the weight tray, a weighing sensor is placed on the working plate, and the lifting driving device can drive the loading mechanism to press the weighing sensor and enable the connecting body and the buffer frame not to generate interaction force.
2. The multi-station creep calibration device according to claim 1, wherein: the lifting driving device is characterized in that a connecting hole is formed in the fixed end of the lifting driving device, a connecting seat is arranged on the bottom surface of the top plate, and the lifting driving device is hinged to the connecting seat through a hollow connecting pipe penetrating through the connecting hole and the connecting seat.
3. The multi-station creep calibration device according to claim 1, wherein: the periphery of the top plate is fixedly connected with the two connecting rods, the middle of the top plate is fixedly connected with one connecting rod, each connecting rod is in threaded connection with an upper nut and a lower nut, and the top plate is clamped and fixed by the upper nut and the lower nut.
4. The multi-station creep calibration device according to claim 1, wherein: the buffer frame comprises a first vertical rod and a first transverse plate, two ends of the first transverse plate are respectively fixedly connected with the top end of the first vertical rod, and the first through hole is formed in the center of the first transverse plate.
5. The multi-station creep calibration device according to claim 1, wherein: the connector includes connecting piece and lower connecting piece, it is equipped with the first screw hole that link up to go up the connecting piece, connecting piece one end down be equipped with first screw hole complex first screw rod, lift drive arrangement's lift drive end be equipped with first screw hole complex second screw rod.
6. The multi-station creep calibration device according to claim 4, wherein: the loading mechanism comprises a second vertical rod, a second transverse plate and a third transverse plate, wherein two ends of the second transverse plate are respectively fixedly connected with the top end of the second vertical rod, two ends of the third transverse plate are respectively fixedly connected with the bottom end of the second vertical rod, the working plate is provided with a plurality of second through holes, the second vertical rod respectively penetrates through one of the second through holes, and the bottom end of the first vertical rod is fixedly connected onto the second transverse plate.
7. The multi-station creep calibration device according to claim 6, wherein: a second threaded hole is formed in the center of the third transverse plate, a connecting rod is fixedly arranged on the weight tray, and external threads matched with the second threaded hole are formed in the peripheral face of the top end of the connecting rod.
8. The multi-station creep calibration device according to claim 6, wherein: still include sensor anchor clamps, sensor anchor clamps are used for placing on the working plate, sensor anchor clamps include punch holder and lower plate, the punch holder with the lower plate passes through bolt fastening centre gripping weighing sensor, the lower plate top surface is equipped with the locating piece, the locating piece is used for the horizontal position of weighing sensor to fix a position, the punch holder top surface is equipped with the arcuation recess, second diaphragm bottom surface is equipped with the arcuation arch, lift drive arrangement's lift drive end can drive the arcuation arch is pressed in the arcuation recess.
9. The multi-station creep calibration device according to claim 1, wherein: the four corners of the bottom surface of the working plate are respectively and fixedly provided with one supporting rod, each supporting rod is a hollow rod, and the bottom surface of each supporting rod is fixedly provided with a supporting base.
10. A creep deformation calibration method based on the multi-station creep deformation calibration device of any one of claims 1 to 9, characterized in that: the method comprises the following steps:
(1) sensor preloading: carrying out three times of preloading on each weighing sensor to be tested, calculating the zero point error and the sensitivity of each weighing sensor after each time of loading is finished, and selecting the weighing sensors with qualified zero point errors and sensitivities;
(2) creep loading: placing a weighing sensor on the working plate at a position corresponding to each loading mechanism, adjusting the lifting driving device to enable each loading mechanism to press each weighing sensor until no interaction force is generated between each connecting body and each buffer frame, and completing loading;
(3) calculating a creep error value: after the loading is finished, recording the loading initial value of each weighing sensor, measuring the loading output value of each weighing sensor every 5min, stopping the measurement until 30min later, recording the loading output value of each weighing sensor according to time intervals, and calculating the difference value between each loading output value and each loading initial value to obtain the creep error value of each weighing sensor;
(4) and (3) creep unloading: after each weighing sensor is loaded for 30min and delayed for 1min, adjusting each lifting driving device to enable each loading mechanism to be far away from each weighing sensor, and completing unloading;
(5) calculating a creep recovery error value: after unloading is finished, measuring unloading initial values of the weighing sensors, measuring the unloading output values of the weighing sensors every 5min until 30min stops, recording the unloading output values of the weighing sensors according to time intervals, and calculating the difference value between each unloading output value and each unloading initial value to obtain creep recovery error values of the weighing sensors;
(6) judging whether the weighing sensor is qualified or not: and according to the creep error value and the creep recovery error value of the weighing sensor, whether the grade of the weighing sensor is qualified or not is divided according to the national standard.
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| CN111982264A (en) * | 2020-07-29 | 2020-11-24 | 重庆火后草科技有限公司 | Quick calibration device of sensor |
| CN112525538A (en) * | 2020-11-10 | 2021-03-19 | 西安航天动力测控技术研究所 | Solid rocket engine test frame thrust in-situ calibration device and use method |
| CN112525538B (en) * | 2020-11-10 | 2023-08-08 | 西安航天动力测控技术研究所 | Solid rocket engine test frame thrust in-situ calibration device and use method |
| CN112985655A (en) * | 2021-02-23 | 2021-06-18 | 杨杰 | Pressure sensor capable of automatically recovering based on intelligent manufacturing |
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