Parallel acceleration sensor calibration platform

Abstract

A parallel acceleration sensor calibration platform disclosed by the present invention comprises a workbench, the workbench is provided with a first sliding plate and a second sliding plate, a first motor and two groups of first transmission mechanisms are arranged below the first sliding plate, the first motor is a double-shaft motor, and an output shaft of the first motor is connected with input ends of the two groups of first transmission mechanisms. A first crank mechanism is further connected to the output shaft of one first transmission mechanism, a second motor and a second transmission mechanism are arranged below the second sliding plate, an output shaft of the second motor is connected with the input end of the second transmission mechanism, a second crank mechanism is connected to the output end of the second transmission mechanism, and an air cylinder is fixedly arranged on the upper end face of the second sliding plate. A rack is fixedly arranged on an output shaft of the air cylinder, and two sets of gear structures are arranged on the upper end face of the first sliding plate. The calibration device achieves calibration of the angular speed and the angular acceleration, calibration of the linear speed and the linear acceleration and simultaneous calibration of the linear speed and the angular speed, and meets the requirement for research on various performance indexes of an acceleration sensor.

Description

Technical Field

[0001] The invention relates to the field of acceleration sensor experimental platforms, and in particular to a parallel acceleration sensor calibration platform. Background Art

[0002] At present, the research on acceleration sensors at home and abroad is still in the exploratory stage, and various performances are far below the application requirements. One of the important reasons is the lack of an acceleration sensor calibration platform that meets the calibration requirements.

[0003] There are some problems with the existing acceleration sensor experimental platform. For example, the meshing of the gear rack requires the use of a clearance device for manual adjustment to achieve the meshing and disengagement of the gear rack. This method makes the sensor measurement inaccurate, wastes a lot of time, and consumes a lot of labor. Therefore, the market is in urgent need of a method that is simple and fast to operate and can accurately calibrate the accuracy of sensor measurement. In response to the above problems, a solution is proposed below. Summary of the invention

[0004] The purpose of the present invention is to provide a parallel acceleration sensor calibration platform, which has the advantages of simple operation, low cost and high accuracy.

[0005] The above technical objectives of the present invention are achieved through the following technical solutions: A parallel acceleration sensor calibration platform comprises a workbench, wherein a sliding plate 1 and a sliding plate 2 are provided on the workbench, and the sliding plate 1 and the sliding plate 2 are both slidably connected to the workbench, a motor 1 and a transmission mechanism 1 are provided below the sliding plate 1, and the output shaft of the motor 1 is connected to the input end of the transmission mechanism 1, and a crank mechanism 1 is also connected to the output shaft of one of the transmission mechanisms 1, and the crank mechanism 1 is used to drive the sliding plate 1 to move back and forth, a motor 2 and a transmission mechanism 2 are provided below the sliding plate 2, the output shaft of the motor 2 is connected to the input end of the transmission mechanism 2, and the output end of the transmission mechanism 2 is connected to the crank mechanism 2, and the crank mechanism 2 is used to drive the sliding plate 2 to move back and forth, a cylinder is fixedly provided on the upper end surface of the sliding plate 2, and a rack is fixedly provided on the output shaft of the cylinder, and the rack is located on one side of the spur gear 1 and the spur gear 2, and a gear structure is provided on the upper end surface of the sliding plate 1, and the gear structure is rotatably connected to the sliding plate, and the cylinder is used to adjust the position of the rack so that the rack is meshed or separated from the gear structure.

[0006] Preferably, the transmission mechanism 1 includes a main bevel gear 1, a secondary bevel gear 1, a support platform 1 and a rotating shaft 1. Two cover shells are provided in the workbench, and the two cover shells respectively cover the outside of motor 1 and motor 2. The support platform 1 is fixedly connected to one of the cover shells, and the rotating shaft 1 passes through the support platform and is rotatably connected to the support platform. The upper end of the rotating shaft 1 is connected to a crank mechanism 1, and the lower end of the rotating shaft is fixedly connected to a secondary bevel gear 1. The main bevel gear 1 is fixedly connected to the output shaft of motor 1, and the main bevel gear 1 is meshed with the secondary bevel gear 1.

[0007] Preferably, the crank mechanism comprises a crank and a pin, the rotating shaft is fixedly connected to the center of the crank, the pin is fixed to the upper end surface of the crank and is located away from the center of the crank, a pin groove is provided on the sliding plate, one end of the pin is located in the pin groove and is slidably connected to the pin groove.

[0008] Preferably, the second transmission mechanism includes a second main bevel gear, a second auxiliary bevel gear, a second support platform and a second rotating shaft. The second support platform is fixedly connected to another cover shell, the second rotating shaft passes through the support platform and is rotatably connected to the support platform, the upper end of the second rotating shaft is connected to the second crank mechanism, the lower end of the rotating shaft is fixedly connected to the second auxiliary bevel gear, the second main bevel gear is fixedly connected to the output shaft of the second motor, and the second main bevel gear is meshed with the second auxiliary bevel gear.

[0009] Preferably, the crank mechanism 2 includes a crank 2 and a pin 2, the rotating shaft 2 is fixedly connected to the center of the crank 2, the pin 2 is fixed to the upper end surface of the crank 2 and is located away from the center of the crank 2, the sliding plate 2 is provided with a pin groove 2, one end of the pin 2 is located in the pin groove 2 and is slidably connected to the pin groove 2.

[0010] Preferably, a solenoid valve is provided on the sliding plate 2, and the solenoid valve is used to control the air intake and air outlet of the cylinder.

[0011] Preferably, the lower end surfaces of the sliding plate 1 and the sliding plate 2 are fixedly provided with guide grooves, the workbench is fixedly provided with guide rails, and the sliding plate 1 and the sliding plate 2 are connected to the guide rails through the guide grooves so that the sliding plate 1 and the sliding plate 2 are slidably connected to the workbench.

[0012] Preferably, the gear structure includes spur gear 1, spur gear 2, cylindrical table 1 and cylindrical table 2, the upper end surface of the sliding plate 1 is provided with two connecting grooves, the cylindrical table 1 and cylindrical table 2 are respectively located in the two connecting grooves and are rotatably connected to the connecting grooves, the upper ends of the cylindrical table 1 and the cylindrical table 2 are both provided with shafts, the spur gear 1 is fixedly connected to the shaft on the cylindrical table 1, the spur gear 2 is fixedly connected to the shaft on the cylindrical table 2, a standard acceleration sensor is arranged on the cylindrical table 1, and the cylindrical table 2 is used to place the acceleration sensor to be calibrated.

[0013] The beneficial effects of the present invention are as follows: sensor calibration refers to identifying and verifying the parameters and performance of the sensor by using a certain standard instrument through experiments on the premise of clarifying the input and output transformation relationship of the measured signal. The acceleration sensor calibration platform directly applies force / torque to the acceleration sensor to replace the force / torque generated by acceleration, thereby completing the calibration of the acceleration sensor and obtaining the calibration matrix of the sensor.

[0014] When working, you only need to fix the sensor on the loading platform and apply force / torque to the sensor through the motor. The platform can output pure linear motion, pure angular motion, and composite motion of linear motion and rotation. It is easy to operate and has high accuracy. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a structural schematic diagram of an embodiment; Figure 2 It is a main structural diagram of an embodiment; Figure 3 It is a top view of the structure of the embodiment.

[0016] : 1. workbench; 2. sliding plate 1; 21. pin groove 1; 3. sliding plate 2; 31. pin groove 2; 32. solenoid valve; 33. cylinder; 34. rack; 4. motor 1; 5. transmission mechanism 1; 51. main bevel gear 1; 52. secondary bevel gear 1; 53. support platform 1; 54. rotating shaft 1; 6. crank mechanism 1; 61. crank 1; 62. pin 1; 7. motor 2; 8. transmission mechanism 2; 81. main bevel gear 2; 82. secondary bevel gear 2; 83. support platform 2; 84. rotating shaft 2; 9. crank mechanism 2; 91. crank 2; 92. pin 2; 10. cover; 11. gear structure; 111. spur gear 1; 112. spur gear 2; 113. cylindrical platform 1; 114. cylindrical platform 2; 12. guide rail; 13. guide groove. DETAILED DESCRIPTION

[0017] The following is only a preferred embodiment of the present invention, and the protection scope is not limited to this embodiment. All technical solutions under the concept of the present invention should belong to the protection scope of the present invention. The same parts are represented by the same figure marks. It should be noted that the words "front", "rear", "left", "right", "up" and "down" used in the following description refer to the directions in the drawings, and the words "bottom" and "top", "inside" and "outside" refer to the directions toward or away from the geometric center of a specific component, respectively.

[0018] like Figures 1 to 3As shown, a parallel acceleration sensor calibration platform includes a workbench 1, on which a sliding plate 1 2 and a sliding plate 2 3 are provided. The sliding plate 1 2 and the sliding plate 2 3 are both located on the upper end surface of the workbench 1, and the sliding plate 1 2 and the sliding plate 2 3 are located at the same height. The lower end surfaces of the sliding plate 1 2 and the sliding plate 2 3 are fixedly provided with a guide groove 13, and a guide rail 12 is fixedly provided on the workbench 1. The sliding plate 1 2 and the sliding plate 2 3 are sleeved on the guide rail 12 through the guide groove 13, so that the sliding plate 1 2 and the sliding plate 2 3 can move on the upper end surface of the workbench 1. In order to ensure the stability of the sliding plate 1 2 and the sliding plate 2 3 when moving, two guide grooves 13 are provided at the lower ends of the sliding plate 1 2 and the sliding plate 2 3, and the workbench 1 is provided with a number of guide rails 12 corresponding to the guide grooves 13. The four guide rails 12 on the workbench 1 are kept parallel, and the guide groove 13 at the lower end of the sliding plate 1 2 is set as the guide groove 13 1, and the guide groove 13 at the lower end of the sliding plate 2 3 is set as the guide groove 13 2; the length direction of the four guide rails 12 is set as the Y direction, and the arrangement direction of the guide rails 12 is set as the X direction, that is, the sliding plate 1 2 and the sliding plate 2 3 can only move in the Y direction, and cannot move in the X direction.

[0019] A motor 4 and a transmission mechanism 5 are arranged below the sliding plate 2, and a cover 10 is arranged outside the motor 4. The cover 10 is fixedly connected to the workbench 1 to protect the motor 4 and the transmission mechanism 5 located inside the cover 10.

[0020] The transmission mechanism 15 includes a main bevel gear 151, a secondary bevel gear 152, a support platform 153 and a rotating shaft 154. The support platform 153 in this design is a cylindrical platform body, which mainly plays a supporting role. The rotating shaft 154 longitudinally penetrates the support platform 153 and is rotatably connected with the support platform 153. The lower end of the rotating shaft 154 is located in the cover 10, and the lower end of the rotating shaft 154 is connected to the secondary bevel gear 152. The main bevel gear 151 is connected to the output shaft of the motor 14, and the main bevel gear 151 is meshed with the secondary bevel gear 152. When the motor 14 drives the main bevel gear 151 to rotate, it will drive the rotating shaft 154 to rotate through the secondary bevel gear 152. The upper end of the rotating shaft 154 is connected to a crank mechanism 16, which is used to drive the sliding plate 2 to move.

[0021] The crank mechanism 6 includes a crank 61 and a pin 62. The crank 61 is circular, and the upper end of the rotating shaft 54 ​​is fixedly connected to the center of the lower end face of the crank 61. The pin 62 is fixed to the upper end face of the crank 61 and deviates from the position where the center of the crank 61 is located. A pin groove 21 is provided on the sliding plate 2, and one end of the pin 62 is located in the pin groove 21. When the crank 61 rotates with the rotating shaft 54, the pin 62 will drive the sliding plate 2 to move. Since the sliding plate 2 can only move in the Y direction, in order to enable the crank mechanism 6 to smoothly drive the sliding plate 2 to move, the pin groove 21 is long in the X direction and does not affect the movement of the pin 62 in the X direction.

[0022] A gear structure 11 is provided on the upper end surface of the sliding plate 12. The gear structure 11 includes a spur gear 1 111, a spur gear 2 112, a cylindrical platform 1 113 and a cylindrical platform 2 114. The upper ends of the cylindrical platform 1 113 and the cylindrical platform 2 114 are both provided with shafts. The spur gear 1 111 is fixed on the shaft at the upper end of the cylindrical platform 1 13, and the spur gear 2 112 is fixed on the shaft at the upper end of the cylindrical platform 2 114. Two connecting grooves are provided on the upper end surface of the sliding plate 12. Both connecting grooves are circular, and the centers of the two connecting grooves are on the same straight line in the Y direction. The cylindrical platform 1 113 and the cylindrical platform 2 114 are respectively located in the two connecting grooves and are rotationally connected to the connecting grooves. In this design, a standard acceleration sensor is provided on the cylindrical platform 1 13, and the cylindrical platform 2 114 is used to place the acceleration sensor to be calibrated. In order to avoid the influence of other factors, the specifications of the spur gear 1 111 and the spur gear 2 112 are the same, and the positions of the spur gear 1 111 and the spur gear 2 112 are offset only in the Y direction, and the other position data, such as height, are the same. The specifications and other data between the cylindrical platform 1 113 and the cylindrical platform 2 114 are also the same, and the only difference is the position in the Y direction. In addition, the spur gear 1 111 and the spur gear 2 112 are not in contact, and the cylindrical platform 1 113 and the cylindrical platform 2 114 are not in contact.

[0023] A motor 27 and a transmission mechanism 28 are arranged below the sliding plate 23, and the structures and connections between the sliding plate 23, the motor 27 and the transmission mechanism 28 are the same as those at the sliding plate 12. A cover 10 is arranged outside the motor 27, and the cover 10 is fixedly connected to the workbench 1.

[0024] Transmission mechanism 28 includes main bevel gear 281, secondary bevel gear 282, support platform 283 and rotating shaft 284. Support platform 283 in this design is a cylindrical platform, which mainly plays a supporting role. Rotating shaft 284 longitudinally penetrates support platform 283 and is rotatably connected with support platform 283. The lower end of rotating shaft 284 is located in the cover 10, and the lower end of rotating shaft 284 is connected with secondary bevel gear 282. Main bevel gear 281 is connected with the output shaft of motor 27, and main bevel gear 281 is meshed with secondary bevel gear 282. When motor 27 drives main bevel gear 281 to rotate, it will drive rotating shaft 284 to rotate through secondary bevel gear 282. The upper end of rotating shaft 284 is connected with crank mechanism 29, which is used to drive sliding plate 23 to move.

[0025] The crank mechanism 29 includes a crank 291 and a pin 292. The crank 291 is circular, and the upper end of the rotating shaft 284 is fixedly connected to the center of the circle of the lower end face of the crank 291. The pin 292 is fixed to the upper end face of the crank 291 and deviates from the position where the center of the circle of the crank 291 is located. A pin groove 231 is provided on the sliding plate 23, and the two ends of the pin 292 are located in the pin groove 231. When the crank 291 rotates with the rotating shaft 284, the pin 292 will drive the sliding plate 23 to move. Since the sliding plate 23 can only move in the Y direction, in order to enable the crank mechanism 29 to smoothly drive the sliding plate 23 to move, the pin groove 231 is long in the X direction, which does not affect the movement of the pin 292 in the X direction.

[0026] The upper end surface of the sliding plate 2 3 is fixed with a cylinder 33, and a rack 34 is fixed on the output shaft of the cylinder 33, and the rack 34 is located on one side of the spur gear 1 111 and the spur gear 2 112. The cylinder 33 is connected to an external air compressor, and the sliding plate 2 3 is provided with a solenoid valve 32, which is used to control the air intake and air outlet of the cylinder 33.

[0027] A standard acceleration sensor is placed on the cylindrical platform 113, and an acceleration sensor to be calibrated is placed on the cylindrical platform 2 114. A certain excitation frequency is applied, and calibration is performed through 10 motion states of the transmission mechanism of the calibration platform.

[0028] The motion states of the calibration platform are divided into 10 types: Motion state 1: Motor 1 rotates, motor 2 does not work, and the two spur gears and the rack are disengaged from each other; Motion state 2: Motor 1 rotates, motor 2 does not work, and the two spur gears and the rack are meshed with each other; Motion state 3: Motor 1 rotates, and motor 2 rotates at the same speed, and the two spur gears and the rack are disengaged from each other; Motion state 4: Motor 1 rotates, and motor 2 rotates at the same speed, and the two spur gears and the rack are meshed with each other; Motion state 5: Motor 1 rotates, while Motor 2 rotates at a different speed, and the two spur gears and the rack are disengaged from each other; Motion state 6: Motor 1 rotates, while Motor 2 rotates at a different speed, and the two spur gears and the rack are meshed with each other; Motion state 7: Motor 1 does not work, motor 2 rotates, and the two spur gears and the rack are disengaged from each other; Motion state 8: Motor 1 is not working, motor 2 is rotating, and the two spur gears and the rack are meshing with each other; Motion state 9: Motor 1 does not work, motor 2 does not work, and the two spur gears and the rack are disengaged from each other; Motion state 10: Motor 1 is not working, motor 2 is not working, and the two spur gears and the rack are meshing with each other.

[0029] 1. Angular velocity and angular acceleration response calibration Platform motion state 8: When the motion mode of the calibration platform is that the motor 1 4 is not working, the motor 2 7 is rotating, and the spur gear 1 111, the spur gear 2 112 and the rack 34 are meshed with each other. Similarly, the guide groove 132 moves back and forth, and the guide groove 131 is stationary. Since the spur gear 1 111, the spur gear 2 112 and the rack 34 are meshed with each other, the cylindrical platform 1 113 and the cylindrical platform 2 114 rotate with angular motion, and the acceleration sensor can detect the angular velocity of the cylindrical platform 1 113 and the cylindrical platform 2 114. and angular acceleration The response is then calibrated by comparing the acceleration sensor to be calibrated with the standard sensor. The speed of the motor 2 7 is changed to give the sensor different angular velocities, so that calibration can be achieved at different angular velocities.

[0030] The two motion modes can realize accurate calibration of sensor angular velocity and angular acceleration.

[0031] 2. Linear velocity and linear acceleration response calibration The principles of platform motion states 1, 3, 4, and 5 are the same, and linear velocity and linear acceleration response calibration can be achieved. For example, motion state 1: when the motion mode of the calibration platform is that motor 1 4 rotates, motor 2 7 does not work, and spur gear 1 111, spur gear 2 112, and rack 34 are disengaged from each other. Guide groove 13- moves back and forth driven by motor 1 4. Since motor 2 7 does not work, guide groove 13- is stationary. At this time, cylindrical table 1 13 and cylindrical table 2 114 only have linear velocity, which the acceleration sensor can detect and then calibrate the acceleration sensor to be calibrated by comparing it with the standard sensor. By changing the rotation speed of motor 1 4 and giving the sensor different linear velocities, calibration at different linear velocities can be achieved.

[0032] 3. Angular velocity, angular acceleration response and linear velocity, linear acceleration response calibration Platform motion state 2: When the motion mode of the calibration platform is that the motor 14 rotates, the motor 27 does not work, and the spur gear 111, the spur gear 2112 and the rack 34 are meshed with each other. The motor 14 works to drive the main bevel gear 151 to rotate, and the main bevel gear 151 and the secondary bevel gear 152 are meshed with each other for transmission. The secondary bevel gear 152 drives the crank 161 to rotate through the connecting shaft 1, so that the column pin 162 reciprocates in the pin groove 121, and then the guide groove 131 moves back and forth along the guide rail 121, thereby realizing the back and forth movement of the guide groove 131. Since the motor 27 does not work, the guide groove 132 is stationary. Since the spur gear 111 and the spur gear 2112 on the guide groove 131 are meshed with the rack 34 on the guide groove 132, the cylindrical platform 113 and the cylindrical platform 214 are driven to rotate. At this time, the cylindrical platform 113 and the cylindrical platform 2 114 can realize angular motion, and the two acceleration sensors on the cylindrical platforms can detect the angular velocity of the two cylindrical platforms 113 and the cylindrical platform 2 114. and angular acceleration In response, the acceleration sensor to be calibrated is calibrated by comparing it with the standard sensor. By changing the speed of the motor 4, the sensor is given different angular velocities and linear velocities, and synchronous calibration under different angular velocities and linear velocities can be achieved.

[0033] Platform motion state 6: When the motion mode of the calibration platform is that the motor 1 4 rotates, the motor 2 7 rotates at different speeds, and the spur gear 1 111, the spur gear 2 112 and the rack 34 are meshed with each other. The motor 1 4 drives the guide groove 13 to reciprocate, which can give the cylindrical platform 1 113 and the cylindrical platform 2 114 a linear velocity. and linear acceleration Since the rotation speed of motor 27 is different from that of motor 14, there is a relative motion between guide slot 132 and guide slot 131. Since spur gear 111 and spur gear 2112 on guide slot 131 are meshed with rack 34 on guide slot 132, the relative motion is converted into the rotation of cylindrical platform 113 and cylindrical platform 214, that is, angular velocity is given to cylindrical platform 113 and cylindrical platform 214. and angular acceleration By comparing the linear velocity of the accelerometer to be calibrated with the standard sensor , Linear Acceleration and angular velocity , angular acceleration Calibration is performed. By changing the speed of motor 14 and giving the sensor different linear speeds, calibration can be achieved at different linear speeds. By changing the speed of motor 27 and giving the sensor different angular speeds, calibration can be achieved at different angular speeds. This motion mode can achieve synchronous calibration of angular velocity, angular acceleration response, linear velocity, and linear acceleration response under multi-dimensional motion.

[0034] 4. Static calibration The principles of platform motion states 7, 9, and 10 are the same, and they can all ensure that cylindrical platform 1 113 and cylindrical platform 2 114 are stationary, thereby achieving static calibration of the sensor.

[0035] The specific embodiments described above further illustrate the technical problems, technical solutions and beneficial effects solved by the present invention. It should be understood that the above are only specific embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A parallel acceleration sensor calibration platform, comprising a workbench (1), characterized in that: The workbench (1) is provided with a sliding plate 1 (2) and a sliding plate 2 (3), both of which are slidably connected to the workbench (1), a motor 1 (4) and a transmission mechanism 1 (5) are provided below the sliding plate 1 (2), the output shaft of the motor 1 (4) and the input end of the transmission mechanism 1 (5) are both connected, one of the output shafts of the transmission mechanism 1 (5) is also connected to a crank mechanism 1 (6), the crank mechanism 1 (6) is used to drive the sliding plate 1 (2) to reciprocate, a motor 2 (7) and a transmission mechanism 2 (8) are provided below the sliding plate 2 (3), the output shaft of the motor 2 (7) and the input end of the transmission mechanism 2 (8) are both connected to the output shaft of the transmission mechanism 1 (5), the crank mechanism 1 (6) is used to drive the sliding plate 1 (2) to reciprocate, The input end of the transmission mechanism 2 (8) is connected to a crank mechanism 2 (9) on its output end, the crank mechanism 2 (9) is used to drive the sliding plate 2 (3) to move back and forth, a cylinder (33) is fixedly provided on the upper end surface of the sliding plate 2 (3), a rack (34) is fixedly provided on the output shaft of the cylinder (33), the rack (34) is located on one side of the spur gear 1 (111) and the spur gear 2 (112), a gear structure (11) is provided on the upper end surface of the sliding plate 1 (2), the gear structure (11) is rotatably connected to the sliding plate, and the cylinder (33) is used to adjust the position of the rack (34) so ​​that the rack (34) is engaged with or separated from the gear structure (11).

2. The parallel acceleration sensor calibration platform according to claim 1, characterized in that: The transmission mechanism (5) comprises a main bevel gear (51), a secondary bevel gear (52), a support platform (53) and a rotating shaft (54). Two cover shells (10) are arranged inside the workbench (1). The two cover shells (10) respectively cover the outer sides of the motor (4) and the motor (7). The support platform (53) is fixedly connected to one of the cover shells (10). The rotating shaft (54) passes through the support platform and is rotatably connected to the support platform. The upper end of the rotating shaft (54) is connected to the crank mechanism (6), and the lower end of the rotating shaft is fixedly connected to the secondary bevel gear (52). The main bevel gear (51) is fixedly connected to the output shaft of the motor (4), and the main bevel gear (51) is meshed with the secondary bevel gear (52).

3. The parallel acceleration sensor calibration platform according to claim 2, characterized in that: The crank mechanism (6) comprises a crank (61) and a pin (62); the rotating shaft (54) is fixedly connected to the center of the crank (61); the pin (62) is fixed to the upper end surface of the crank (61) and is located away from the center of the crank (61); a pin groove (21) is provided on the sliding plate (2); one end of the pin (62) is located in the pin groove (21) and is slidably connected to the pin groove (21).

4. The parallel acceleration sensor calibration platform according to claim 2, characterized in that: The transmission mechanism 2 (8) comprises a main bevel gear 2 (81), a secondary bevel gear 2 (82), a support platform 2 (83) and a rotating shaft 2 (84); the support platform 2 (83) is fixedly connected to another cover shell (10); the rotating shaft 2 (84) passes through the support platform and is rotatably connected to the support platform; the upper end of the rotating shaft 2 (84) is connected to the crank mechanism 2 (9); the lower end of the rotating shaft is fixedly connected to the secondary bevel gear 2 (82); the main bevel gear 2 (81) is fixedly connected to the output shaft of the motor 2 (7); and the main bevel gear 2 (81) is meshed with the secondary bevel gear 2 (82).

5. The parallel acceleration sensor calibration platform according to claim 4, characterized in that: The crank mechanism 2 (9) comprises a crank 2 (91) and a pin 2 (92); the rotating shaft 2 (84) is fixedly connected to the center of the crank 2 (91); the pin 2 (92) is fixed to the upper end surface of the crank 2 (91) and is located away from the center of the crank 2 (91); a pin groove 2 (31) is provided on the sliding plate 2 (3); one end of the pin 2 (92) is located in the pin groove 2 (31) and is slidably connected to the pin groove 2 (31).

6. The parallel acceleration sensor calibration platform according to claim 5, characterized in that: The second sliding plate (3) is provided with an electromagnetic valve (32), and the electromagnetic valve (32) is used to control the air intake and air outlet of the cylinder (33).

7. The parallel acceleration sensor calibration platform according to claim 1, characterized in that: The lower end surfaces of the sliding plate 1 (2) and the sliding plate 2 (3) are both fixedly provided with guide grooves (13); the workbench (1) is fixedly provided with guide rails (12); the sliding plate 1 (2) and the sliding plate 2 (3) are sleeved on the guide rails (12) through the guide grooves (13), so that the sliding plate 1 (2) and the sliding plate 2 (3) are slidably connected to the workbench (1).

8. The parallel acceleration sensor calibration platform according to claim 1, characterized in that: The gear structure (11) comprises a spur gear 1 (111), a spur gear 2 (112), a cylindrical platform 1 (113) and a cylindrical platform 2 (114); the upper end surface of the sliding plate 1 (2) is provided with two connecting grooves; the cylindrical platform 1 (113) and the cylindrical platform 2 (114) are respectively located in the two connecting grooves and are rotatably connected to the connecting grooves; the upper ends of the cylindrical platform 1 (113) and the cylindrical platform 2 (114) are both provided with shafts; the spur gear 1 (111) is fixedly connected to the shaft on the cylindrical platform 1 (113); the spur gear 2 (112) is fixedly connected to the shaft on the cylindrical platform 2 (114); a standard acceleration sensor is provided on the cylindrical platform 1 (113); and the cylindrical platform 2 (114) is used to place the acceleration sensor to be calibrated.

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