Rotating speed sensor automatic calibration system capable of increasing disturbance

Abstract

The invention relates to a rotation speed sensor automatic calibration system capable of increasing disturbance, which comprises a tested gear, a gear disc, a driving motor, a rotating shaft, a rotation speed sensor, a tachometer, a data acquisition unit, a main control unit and a disturbance applying mechanism, the disturbance applying mechanism comprises a synchronous ring body, a thermal bimetallic strip, a simulation tooth, a connecting rod, an electric control trolley, a locking mechanism, a heating piece, a first electric push rod and a first abutting plate, the heating piece can be brought to the inner sides of different storage grooves through the moving trolley, the heating piece emits heat to enable the thermal bimetallic strip in the storage grooves to deform, the simulation tooth is driven to be retracted into the storage grooves, and the simulation tooth is driven to rotate; a tooth missing state is simulated, when the main control unit sends a control instruction to the driving motor, the driving motor can drive the synchronous ring body and the tested gear to rotate through the rotating shaft, the synchronous ring body is in the tooth missing state and can apply vibration disturbance, and the rotating speed, collected by the rotating speed sensor, of the tested gear can be transmitted to the main control unit for comparison and calibration; the calibration accuracy can be improved by applying different disturbances.

Description

Technical Field

[0001] The present invention relates to the technical field of instrument calibration, and particularly to an automatic calibration system for a rotational speed sensor with increased disturbance. Background Art

[0002] With the continuous improvement of industrial automation and intelligence, rotational speed sensors are widely used in fields such as mechanical equipment operation monitoring, automotive electronics, and aerospace. Their measurement accuracy directly affects the system control performance and operation safety. Existing rotational speed sensor calibrations usually adopt static calibration or calibration methods at fixed rotational speeds. However, in actual working conditions, rotational speed sensors often face complex disturbance factors. Taking a gear transmission system as an example, when a gear has a tooth missing fault, it will cause periodic vibration shocks. This vibration disturbance will not only change the output signal of the rotational speed sensor but also affect its measurement accuracy. However, traditional calibration methods are difficult to simulate the complex disturbance environment in real working conditions such as the vibration caused by a missing tooth, resulting in a deviation between the calibration result and the actual operating state, and it is impossible to effectively guarantee the measurement accuracy. In addition, existing calibration systems mostly rely on manual operation, with low calibration efficiency and difficult-to-guarantee consistency, making it difficult to meet the requirements of mass production and rapid detection. Although some automatic calibration systems have certain automation functions, they have obvious deficiencies in introducing key disturbance factors such as missing tooth vibration and simulating real complex working conditions, and cannot comprehensively cover various interference situations that rotational speed sensors may face in actual applications. Summary of the Invention

[0003] In view of this, the present invention proposes an automatic calibration system for a rotational speed sensor with increased disturbance, which can introduce the vibration disturbance caused by a missing tooth, approximate the real fault, and improve the accuracy of the calibration result of the rotational speed sensor.

[0004] The technical solution of the present invention is realized as follows:

[0005] An automatic calibration system for a rotational speed sensor with increased disturbance, comprising a measured gear, a gear disc, a driving motor, a rotating shaft, a rotational speed sensor, a tachometer, a data collector, a main control unit, and a disturbance applying mechanism. The measured gear is arranged on the gear disc. The output shaft of the driving motor is connected to one end of the rotating shaft, and the other end of the rotating shaft is connected to the measured gear. The rotational speed sensor is arranged on one side of the measured gear. The data collector is respectively connected to the tachometer, the rotational speed sensor, and the main control unit in terms of data. The main control unit is connected to the driving motor in terms of data. The disturbance applying mechanism includes a synchronous ring body, a thermal bimetal sheet, an analog tooth, a connecting rod, an electric control trolley, a locking mechanism, a heating sheet, a first electric push rod, and a first abutting plate. The synchronous ring body is sleeved outside the rotating shaft, and a plurality of receiving grooves are arranged at intervals on its outer circumferential surface. Both sides of the thermal bimetal sheet are connected to the inner wall of the receiving groove. One end of the analog tooth extends into the receiving groove. The connecting rod connects the thermal bimetal sheet and the end of the analog tooth. When the thermal bimetal sheet is heated, it bends towards the center of the synchronous ring body. An annular track is arranged on the inner circumferential surface of the synchronous ring body. The electric control trolley moves within the annular track and is locked by the locking mechanism. The heating sheet is arranged on the side wall of the electric control trolley away from the center of the synchronous ring body. The receiving groove is located outside the moving path of the heating sheet. The first electric push rod is embedded in the inner circumferential surface of the synchronous ring body, and its output shaft is connected to one side of the first abutting plate. The rotating shaft passes through between the first abutting plates. The main control unit is respectively connected to the electric control trolley, the locking mechanism, the heating sheet, and the first electric push rod in terms of data.

[0006] Preferably, the thermal bimetal sheet includes an active layer and a passive layer arranged in an overlapping manner. Both sides of the active layer and the passive layer are connected to the inner wall of the receiving groove. The passive layer is arranged on the side of the active layer facing the center of the synchronous ring body. The connecting rod connects the side of the active layer away from the passive layer and the analog tooth. When the thermal bimetal sheet is heated, it bends towards the passive layer.

[0007] Preferably, limiting grooves are arranged on both sides of the annular track. The electric control trolley includes a moving body, a biaxial motor, and moving wheels. The moving body is located within the annular track. The biaxial motor is arranged inside the moving body, and its output shaft extends outside the moving body and is connected to the moving wheels. The moving wheels are located within the limiting grooves. The main control unit is connected to the moving body in terms of data. The heating sheet is arranged on the side wall of the moving body away from the center of the synchronous ring body.

[0008] Preferably, the electric control trolley further includes auxiliary wheels. The auxiliary wheels are arranged on the side wall of the moving body and are in contact with the inner side wall of the annular track.

[0009] Preferably, the locking mechanism includes a second electric push rod and a second abutting plate. The second electric push rod is symmetrically arranged on the inner top surface of the moving body, and its output shaft extends outside the moving body and is connected to the side wall of the second abutting plate. The main control unit is connected to the second electric push rod in terms of data.

[0010] Preferably, it further includes a gasket, and the gasket is arranged on the outer walls of the first abutting plate and the second abutting plate away from the first electric push rod and the second electric push rod.

[0011] Preferably, the disturbance applying mechanism further includes an electric slide table, a third electric push rod and a pushing plate. The electric slide table is arranged on the gear disc. The third electric push rod is arranged on the top surface of the mover of the electric slide table, and its output shaft is connected to the bottom surface of the pushing plate. The synchronous ring body is located on the moving path of the pushing plate, and the main control unit is in data connection with the electric slide table and the third electric push rod.

[0012] Preferably, the simulated tooth includes a metal main body part and a magnetically detachable strip. One end of the metal main body part extends into the receiving groove and is connected to the connecting rod, and the magnetically detachable strip is detachably connected to the end of the metal main body part away from the bimetal sheet.

[0013] Preferably, the disturbance applying mechanism further includes an electromagnet. The electromagnet is embedded in the top surface of the pushing plate and is used to magnetically attract the magnetically detachable strip. The main control unit is in data connection with the electromagnet.

[0014] Preferably, a T-shaped groove is arranged on the outer wall of the metal main body part, and a T-shaped strip is arranged on the side wall of the magnetically detachable strip. The T-shaped strip is located in the T-shaped groove.

[0015] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0016] ① The main control unit can send instructions to the drive motor. The drive motor can drive the gear under test to rotate. The speed sensor is used to collect the speed information of the gear under test. The data collector can process the speed information, and the processed data can be sent to the main control unit. The main control unit compares the speed information to judge whether the data collected by the speed sensor is accurate, so as to compensate and calibrate the drive of the drive motor.

[0017] ② A synchronous ring body is arranged on the rotating shaft. After the electric control trolley moves to different positions, the heating sheet can heat the bimetal sheet in the receiving groove, causing the bimetal sheet to deform and driving the simulated tooth to retract into the receiving groove, simulating a missing tooth. When the synchronous ring body and the gear under test rotate with the rotating shaft, the missing tooth state of the synchronous ring body will generate radial vibration, simulating the missing tooth state in the real situation. The speed information collected by the speed sensor can reflect the response characteristics of the speed sensor under different vibration conditions, and can more comprehensively evaluate the performance of the speed sensor, and then perform more accurate calibration. Description of the Drawings

[0018] To more clearly illustrate the technical solutions in the embodiments of the present invention, the following will briefly introduce the drawings required for the description of the embodiments. Obviously, the drawings in the following description are only the preferred embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0019] Figure 1 It is a schematic diagram of the principle of an automatic calibration system for a rotational speed sensor with increased perturbation according to the present invention;

[0020] Figure 2 It is a schematic diagram of the connection structure between the perturbation application mechanism and the rotating shaft of an automatic calibration system for a rotational speed sensor with increased perturbation according to the present invention;

[0021] Figure 3 It is a schematic diagram of the structure of a synchronous ring body of an automatic calibration system for a rotational speed sensor with increased perturbation according to the present invention;

[0022] Figure 4 It is a cross-sectional view of a synchronous ring body of an automatic calibration system for a rotational speed sensor with increased perturbation according to the present invention;

[0023] Figure 5 It is a schematic diagram of the connection structure between a moving trolley and an annular track of an automatic calibration system for a rotational speed sensor with increased perturbation according to the present invention;

[0024] Figure 6 It is a schematic diagram of the structure of an analog tooth of an automatic calibration system for a rotational speed sensor with increased perturbation according to the present invention;

[0025] In the figure, 1, the gear to be measured; 2, the gear disk; 3, the drive motor; 4, the rotating shaft; 5, the rotational speed sensor; 6, the tachometer; 7, the data collector; 8, the main control unit; 9, the synchronous ring body; 10, the thermal bimetal sheet; 11, the analog tooth; 12, the connecting rod; 13, the electric control trolley; 14, the heating sheet; 15, the first electric push rod; 16, the first abutting plate; 17, the receiving groove; 18, the annular track; 19, the active layer; 20, the passive layer; 21, the limiting groove; 22, the moving body; 23, the dual-axis motor; 24, the driving wheel; 25, the auxiliary wheel; 26, the second electric push rod; 27, the second abutting plate; 28, the gasket; 29, the electric sliding table; 30, the third electric push rod; 31, the pushing plate; 32, the metal main body part; 33, the magnetically detachable strip; 34, the electromagnet; 35, the T-shaped groove; 36, the T-shaped strip. Detailed implementation manners

[0026] To better understand the technical content of the present invention, a specific embodiment is provided below, and the present invention will be further described in conjunction with the drawings.

[0027] See Figures 1 to 6, an automatic calibration system for a rotational speed sensor with increased perturbation provided by the present invention includes a measured gear 1, a gear disc 2, a driving motor 3, a rotating shaft 4, a rotational speed sensor 5, a tachometer 6, a data collector 7, a main control unit 8, and a perturbation applying mechanism. The measured gear 1 is arranged on the gear disc 2. The output shaft of the driving motor 3 is connected to one end of the rotating shaft 4, and the other end of the rotating shaft 4 is connected to the measured gear 1. The rotational speed sensor 5 is arranged on one side of the measured gear 1. The data collector 7 is respectively connected to the tachometer 6, the rotational speed sensor 5, and the main control unit 8 in terms of data. The main control unit 8 is connected to the driving motor 3 in terms of data. The perturbation applying mechanism includes a synchronous ring body 9, a thermal bimetal sheet 10, an analog tooth 11, a connecting rod 12, an electric control trolley 13, a locking mechanism, a heating sheet 14, a first electric push rod 15, and a first abutting plate 16. The synchronous ring body 9 is sleeved outside the rotating shaft 4, and a plurality of receiving grooves 17 are arranged at intervals on its outer circumferential surface. Both sides of the thermal bimetal sheet 10 are connected to the inner wall of the receiving groove 17. One end of the analog tooth 11 extends into the receiving groove 17. The connecting rod 12 connects the thermal bimetal sheet 10 and the end of the analog tooth 11. When the thermal bimetal sheet 10 is heated, it bends towards the center of the synchronous ring body 9. An annular track 18 is arranged on the inner circumferential surface of the synchronous ring body 9. The electric control trolley 13 moves within the annular track 18 and is locked by the locking mechanism. The heating sheet 14 is arranged on the side wall of the electric control trolley 13 away from the center of the synchronous ring body 9. The receiving groove 17 is located outside the moving path of the heating sheet 14. The first electric push rod 15 is embedded in the inner circumferential surface of the synchronous ring body 9, and its output shaft is connected to one side of the first abutting plate 16. The rotating shaft 4 passes through between the first abutting plates 16. The main control unit 8 is respectively connected to the electric control trolley 13, the locking mechanism, the heating sheet 14, and the first electric push rod 15 in terms of data.

[0028] An automatic calibration system for a rotational speed sensor 5 with increased perturbation of the present invention is used to calibrate the rotational speed detection result of the rotational speed sensor 5. The main control unit 8 can send a control instruction to the driving motor 3, and the control instruction will include the standard rotational speed information of the driving motor 3. Then, the driving motor 3 can be driven by the rotating shaft 4, and the rotating shaft 4 can drive the measured gear 1 on its end to rotate. A non-contact rotational speed sensor 5 is arranged on one side of the measured gear 1, which can collect the rotational speed information of the measured gear 1 and process and transmit it through the data collector 7. The processed actual rotational speed information will be transmitted to the tachometer 6 for display on the one hand and to the main control unit 8 on the other hand. The main control unit 8 compares the standard rotational speed information and the actual rotational speed information to judge whether the rotational speed information collected by the rotational speed sensor 5 is accurate. Then, by transmitting multiple control instructions to the driving motor 3, multiple calibrations of the driving motor 3 and the rotational speed sensor 5 can be achieved.

[0029] In order to make the information collection of the rotational speed sensor 5 closer to the actual situation, the present invention provides a disturbance application mechanism. A synchronous ring body 9 is sleeved outside the rotating shaft 4. A plurality of receiving grooves 17 are provided on the outer circumferential surface of the synchronous ring body 9. An analog tooth 11 is provided in each receiving groove 17. In the normal state, the analog tooth 11 extends outside the synchronous ring body 9. That is, the synchronous ring body 9 and the analog tooth 11 can be used to simulate a normal gear. A first electric push rod 15 is embedded in the inner circumferential surface of the synchronous ring body 9. The first electric push rod 15 can make the first abutting plate 16 abut against the outer wall of the rotating shaft 4. Thus, the synchronous ring body 9 can rotate synchronously with the rotating shaft 4 and the measured gear 1. A thermal bimetal 10 is provided in each receiving groove 17. The thermal bimetal 10 is connected to the analog tooth 11 through a connecting rod 12. When the thermal bimetal 10 is heated, it will bend towards the inside of the receiving groove 17, thereby driving the analog tooth 11 to retract into the receiving groove 17 to simulate the tooth missing state of the gear 11. When the rotating shaft 4 drives the synchronous ring body 9 in the tooth missing state to rotate, the eccentricity of the rotation of the synchronous ring body 9 caused by the tooth missing will drive the rotating shaft 4 to generate radial vibration and transmit it to the measured gear 1. At this time, the rotational speed information collected by the rotational speed sensor 5 can reflect the response characteristics of the rotational speed sensor 5 under different vibration conditions, and can more comprehensively evaluate the performance of the rotational speed sensor 5, and then perform more accurate calibration. Additionally, due to different heating times of the thermal bimetal 10, the degree of its bending is also different. Therefore, the depth at which the analog tooth 11 descends into the receiving groove 17 can be adjusted to simulate the heights of different teeth, thereby providing various different disturbances.

[0030] An annular track 18 is provided on the inner circumferential surface of the synchronous ring body 9. The electric control trolley 13 can move within the annular track 18, thereby driving the heating sheet 14 to move to the inner sides of different receiving grooves 17. When the heating sheet 14 is energized and heated, it can transfer heat to the receiving grooves 17, thereby heating the thermal bimetal 10 and causing the thermal bimetal 10 to deform. By means of the electric control trolley 13, the accommodation of the analog teeth 11 at different positions can be realized, simulating tooth missing at different positions and different quantities, further enriching the diversity of disturbances, and thus enabling more accurate calibration of the rotational speed sensor 5.

[0031] Preferably, the thermal bimetal 10 includes an active layer 19 and a passive layer 20 which are stacked. Both sides of the active layer 19 and the passive layer 20 are connected to the inner wall of the receiving groove 17. The passive layer 20 is arranged on the side of the active layer 19 facing the center of the synchronous ring body 9. The connecting rod 12 connects the side of the active layer 19 away from the passive layer 20 and the analog tooth 11. When the thermal bimetal 10 is heated, it bends towards the passive layer 20.

[0032] The active layer 19 is a manganese-nickel-copper alloy layer, and the passive layer 20 is a nickel-iron alloy layer. The passive layer 20 is arranged closer to the inside. When the thermal bimetal sheet 10 is heated, since the coefficient of thermal expansion of the passive layer 20 is lower than that of the active layer 19, the entire thermal bimetal sheet 10 will bend towards the passive layer 20, thereby driving the simulation tooth 11 to be retracted into the storage groove 17 through the connecting rod 12. When the temperature of the thermal bimetal sheet 10 decreases, it will slowly deform and recover, thereby driving the simulation tooth 11 to move outwards and reset, so as to accommodate the simulation teeth 11 at other different positions to simulate missing teeth.

[0033] Preferably, limiting grooves 21 are arranged on both sides of the annular track 18. The electric control trolley 13 includes a moving body 22, a double-shaft motor 23 and moving wheels 24. The moving body 22 is located in the annular track 18. The double-shaft motor 23 is arranged inside the moving body 22, and its output shaft extends out of the moving body 22 and is connected to the moving wheels 24. The moving wheels 24 are located in the limiting grooves 21. The main control unit 8 is data-connected to the moving body 22. The heating sheet 14 is arranged on the side wall of the moving body 22 away from the center of the synchronous ring body 9.

[0034] The entire moving body 22 is located in the annular track 18, and the moving wheels 24 on both sides of it are located in the limiting grooves 21. The double-shaft motor 23 can drive the moving wheels 24 to rotate, so that the moving wheels 24 can move in the limiting grooves 21, driving the entire moving body 22 to move along the annular track 18, and thus can drive the heating sheet 14 to move to the inner side of different storage grooves 17 to heat the thermal bimetal sheet 10.

[0035] Preferably, the electric control trolley 13 further includes auxiliary wheels 25. The auxiliary wheels 25 are arranged on the side wall of the moving body 22 and are in contact with the inner side wall of the annular track 18.

[0036] Since the annular track 18 is a circular structure as a whole, auxiliary wheels 25 are arranged on the outside of the moving body 22. During the movement of the moving body 22, the auxiliary wheels 25 can help the moving body 22 move smoothly.

[0037] Preferably, the locking mechanism includes a second electric push rod 26 and a second abutting plate 27. The second electric push rod 26 is symmetrically arranged on the inner top surface of the moving body 22, and its output shaft extends out of the moving body 22 and is connected to the side wall of the second abutting plate 27. The main control unit 8 is data-connected to the second electric push rod 26.

[0038] After the simulation tooth 11 is stored, the first electric push rod 15 will drive the first abutting plate 16 to abut against the rotating shaft 4. At this time, the rotating shaft 4 can drive the synchronous ring body 9 to rotate. In order to ensure the stability of the mobile trolley in the annular track 18, a second electric push rod 26 is arranged inside it. The second electric push rod 26 can drive the second abutting plate 27 to abut against the inner wall of the annular track 18 to fix the mobile body 22 and prevent the mobile body 22 from shaking during the rotation of the synchronous ring body 9.

[0039] Preferably, it further includes a gasket 28, and the gasket 28 is arranged on the outer walls of the first abutting plate 16 and the second abutting plate 27 away from the first electric push rod 15 and the second electric push rod 26.

[0040] The provided gasket 28 can abut against the outer wall of the rotating shaft 4 and the outer wall of the annular track 18 to increase the friction force and ensure the synchronous rotation of the synchronous ring body 9, the mobile body 22 and the rotating shaft 4.

[0041] Preferably, the disturbance applying mechanism further includes an electric slide table 29, a third electric push rod 30 and a pushing plate 31. The electric slide table 29 is arranged on the gear disk 2. The third electric push rod 30 is arranged on the top surface of the mover of the electric slide table 29, and its output shaft is connected to the bottom surface of the pushing plate 31. The synchronous ring body 9 is located on the moving path of the pushing plate 31. The main control unit 8 is data-connected to the electric slide table 29 and the third electric push rod 30.

[0042] The electric slide table 29 can drive the third electric push rod 30 and the pushing plate 31 to move, and the third electric push rod 30 can drive the pushing plate 31 to lift. When the pushing plate 31 rises to one side of the synchronous ring body 9, driven by the electric slide table 29, the pushing plate 31 can drive the synchronous ring body 9 to move to different positions along the rotating shaft 4 to apply different degrees of disturbance.

[0043] Preferably, the simulation tooth 11 includes a metal main body part 32 and a magnetically detachable strip 33. One end of the metal main body part 32 extends into the storage groove 17 to be connected to the connecting rod 12, and the magnetically detachable strip 33 is detachably connected to the end of the metal main body part 32 away from the thermal bimetal sheet 10.

[0044] The magnetically detachable strip 33 arranged at the end of the simulation tooth 11 can be detached from the metal main body part 32, so as to simulate the tooth defect state under actual conditions, thereby providing various disturbances to improve the calibration accuracy of the rotational speed sensor 5.

[0045] Preferably, the disturbance applying mechanism further includes an electromagnet 34. The electromagnet 34 is embedded in the top surface of the pushing plate 31 and is used to magnetically attract the magnetically detachable strip 33. The main control unit 8 is data-connected to the electromagnet 34.

[0046] The electromagnet 34 is arranged on the top surface of the push plate 31. When it is necessary to simulate tooth defects of the simulated tooth 11, the third electric push rod 30 can drive the push plate 31 to rise, so that the electromagnet 34 rises below the magnetically detachable strip 33. Then, after the electromagnet 34 is powered on, it can magnetically attract the magnetically detachable strip 33. Driven by the electric sliding table 29, the push plate 31 and the electromagnet 34 can drive the magnetically detachable strip 33 to slide out from the metal main body part 32. When the magnetically detachable strip 33 is completely disassembled, the third electric push rod 30 drives the push plate 31 to descend, and the side wall of the push plate 31 can push the synchronous ring body 9 to move along the rotating shaft 4.

[0047] Preferably, a T-shaped groove 35 is arranged on the outer wall of the metal main body part 32, and a T-shaped strip 36 is arranged on the side wall of the magnetically detachable strip 33, and the T-shaped strip 36 is located in the T-shaped groove 35.

[0048] In order to ensure the rapid disassembly and assembly of the metal main body part 32 and the magnetically detachable strip 33, a T-shaped groove 35 is arranged on the outer wall of the metal main body part 32, and the T-shaped strip 36 of the magnetically detachable strip 33 can slide out along the T-shaped groove 35. The direction of the T-shaped groove 35 is perpendicular to the plane formed by the rotation of the synchronous ring body 9. With the cooperation of magnetic force for magnetic attraction, it can ensure that the magnetically detachable strip 33 is stably located on the metal main body part 32.

[0049] The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. An automatic calibration system for a rotational speed sensor with increased perturbation, characterized in that, It includes a gear under test, a gear disk, a driving motor, a rotating shaft, a rotational speed sensor, a tachometer, a data collector, a main control unit, and a disturbance applying mechanism. The gear under test is arranged on the gear disk. The output shaft of the driving motor is connected to one end of the rotating shaft, and the other end of the rotating shaft is connected to the gear under test. The rotational speed sensor is arranged on one side of the gear under test. The data collector is respectively connected to the tachometer, the rotational speed sensor, and the main control unit in terms of data. The main control unit is connected to the driving motor in terms of data. The disturbance applying mechanism includes a synchronous ring body, a thermal bimetal sheet, a simulated tooth, a connecting rod, an electric control trolley, a locking mechanism, a heating sheet, a first electric push rod, and a first abutting plate. The synchronous ring body is sleeved outside the rotating shaft, and a plurality of receiving grooves are arranged at intervals on its outer circumferential surface. Both sides of the thermal bimetal sheet are connected to the inner wall of the receiving groove. One end of the simulated tooth extends into the receiving groove. The connecting rod connects the thermal bimetal sheet and the end of the simulated tooth. When the thermal bimetal sheet is heated, it bends towards the center of the synchronous ring body. An annular track is arranged on the inner circumferential surface of the synchronous ring body. The electric control trolley moves within the annular track and is locked through the locking mechanism. The heating sheet is arranged on the side wall of the electric control trolley away from the center of the synchronous ring body. The receiving groove is located outside the moving path of the heating sheet. The first electric push rod is embedded in the inner circumferential surface of the synchronous ring body, and its output shaft is connected to one side of the first abutting plate. The rotating shaft passes through between the first abutting plates. The main control unit is respectively connected to the electric control trolley, the locking mechanism, the heating sheet, and the first electric push rod in terms of data.

2. The automatic calibration system for a rotational speed sensor with increased perturbation according to claim 1, characterized in that, The thermal bimetal sheet includes an active layer and a passive layer which are stacked. Both sides of the active layer and the passive layer are connected to the inner wall of the receiving groove. The passive layer is arranged on the side of the active layer facing the center of the synchronous ring body. The connecting rod connects the side of the active layer away from the passive layer and the simulated tooth. When the thermal bimetal sheet is heated, it bends towards the passive layer.

3. The automatic calibration system for a rotational speed sensor with increased perturbation according to claim 1, characterized in that, Limiting grooves are arranged on both sides of the annular track. The electric control trolley includes a moving body, a biaxial motor, and moving wheels. The moving body is located within the annular track. The biaxial motor is arranged within the moving body, and its output shaft extends outside the moving body and is connected to the moving wheels. The moving wheels are located within the limiting grooves. The main control unit is connected to the moving body in terms of data. The heating sheet is arranged on the side wall of the moving body away from the center of the synchronous ring body.

4. An automatic calibration system for a rotational speed sensor with increased perturbation according to claim 3, characterized in that, The electric control trolley further includes auxiliary wheels. The auxiliary wheels are arranged on the side wall of the moving body and are in contact with the inner side wall of the annular track.

5. The automatic calibration system for a rotational speed sensor with increased perturbation according to claim 3, characterized in that, The locking mechanism includes a second electric push rod and a second abutting plate. The second electric push rod is symmetrically arranged on the inner top surface of the moving body, and its output shaft extends outside the moving body and is connected to the side wall of the second abutting plate. The main control unit is connected to the second electric push rod in terms of data.

6. The automatic calibration system for a rotational speed sensor with increased perturbation according to claim 5, characterized in that, It further includes gaskets. The gaskets are arranged on the outer walls of the first abutting plate and the second abutting plate away from the first electric push rod and the second electric push rod.

7. The automatic calibration system for a rotational speed sensor with increased perturbation according to claim 1, characterized in that The disturbance applying mechanism further includes an electric slide table, a third electric push rod, and a pushing plate. The electric slide table is arranged on the gear disk. The third electric push rod is arranged on the top surface of the mover of the electric slide table, and its output shaft is connected to the bottom surface of the pushing plate. The synchronous ring body is located on the moving path of the pushing plate. The main control unit is in data connection with the electric slide table and the third electric push rod.

8. The automatic calibration system for a rotational speed sensor with increased perturbation according to claim 6, characterized in that, The simulated tooth includes a metal main body portion and a magnetically detachable strip. One end of the metal main body portion extends into the receiving groove and is connected to the connecting rod. The magnetically detachable strip is detachably connected to the end of the metal main body portion away from the bimetal strip.

9. The automatic calibration system for a rotational speed sensor with increased perturbation according to claim 8, characterized in that, The disturbance applying mechanism further includes an electromagnet. The electromagnet is embedded in the top surface of the pushing plate and is used for magnetically attracting the magnetically detachable strip. The main control unit is in data connection with the electromagnet.

10. The automatic calibration system for a rotational speed sensor with increased perturbation according to claim 8, characterized in that, A T-shaped groove is arranged on the outer wall of the metal main body portion, and a T-shaped strip is arranged on the side wall of the magnetically detachable strip. The T-shaped strip is located in the T-shaped groove.

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