Centrifugal acceleration sensor detection device and detection method thereof

Abstract

The present invention discloses a centrifugal acceleration sensor detection device and a detection method thereof. The detection device includes a frame, an intermediate platform, and a rotating platform; the rotating platform is equipped with a motor drive mechanism, and a plurality of jigs are distributed on the rotating platform; a signal adapter equipped with the jig is connected to an electric slip ring via a wiring harness, and the electric slip ring transmits the signal to an industrial control system; the industrial control system controls the working conditions of the slewing base and the side thrust mechanism. Multiple jigs are distributed on the rotating platform of the present invention, and multiple sensors to be tested can be fixed by the profiling grooves of the jigs. The signals collected by the sensors to be tested can be ultimately transmitted to the industrial control system via the electric slip ring. The industrial control system can automatically match the detection model according to the type of the sensor to be tested, and can complete the automated detection process from fixing the sensor to be tested to outputting the detection result according to the operating instructions.

Description

Technical Field

[0001] The present invention relates to the technical field of sensor detection, and in particular to a centrifugal acceleration sensor detection device and a detection method thereof. Background Art

[0002] With the development of the automotive industry, the vibration generated during vehicle operation has become a major obstacle to this development. Severe vibration during driving can significantly reduce the comfort, stability, and safety of the vehicle, diminishing the enjoyment of the ride and significantly shortening the service life of automotive components. Accelerometers, as the primary sensors for measuring vehicle vibration and longitudinal acceleration, are becoming increasingly important. Therefore, end-of-line testing of accelerometers requires testing their acceleration accuracy.

[0003] Corresponding testing equipment is already available in the prior art for testing sensors. For example, Document 1: CN 116859085A discloses a testing device for an acceleration sensor, comprising: a test plate for fixing the sensor body; a moving mechanism connected to the test plate for moving the test plate; and a test instrument mounted on the test plate, capable of signal connection with the sensor body for displaying the test parameters of the sensor body. In the present invention, the user installs the acceleration sensor on the test instrument. When testing the acceleration sensor, the user controls the driving mechanism to drive the lifting mechanism to move horizontally, thereby causing the lifting mechanism to drive the test plate to move along a preset sliding track. The test plate then drives the test instrument and the acceleration sensor to move at a preset acceleration, causing the acceleration sensor to display the test parameters. The user then reads the test parameters of the acceleration sensor.

[0004] The above-mentioned detection equipment generates horizontal acceleration through a moving mechanism, and then compares the preset acceleration of the test board with the test parameters displayed by the acceleration sensor, thereby obtaining the sensor's detection results. However, the above-mentioned detection equipment has the following defects: (1) The horizontally moving test board and the sliding track need to be arranged very long. If the sliding track is short, the acceleration range that can be detected is limited. If the sliding track is long, the size of the equipment and the difficulty of layout will be greatly increased. (2) During the horizontal movement process, it is difficult for the system to accurately control the acceleration of the test board in the horizontal direction at a stable detection point, and the large amount of torque transmission is also prone to errors.

[0005] Document 2: CN201910992870.4 discloses an acceleration sensor testing device and method, comprising a host computer, a servo motor, an induction generator, a circuit unit, and a turntable. The servo motor's output shaft is connected to the induction generator, the turntable is mounted on the servo motor's output shaft, the circuit unit is embedded in the turntable, the acceleration sensor to be tested is mounted on the circuit unit, and the turntable is provided with a counterweight acceleration sensor and a screw hole array. The circuit unit includes a wireless power module and a wireless data transmission module. The wireless power module is used to wirelessly receive electrical energy from the induction generator and supply it to the acceleration sensor to be tested and the wireless data transmission module. An encoder is provided on the servo motor's output shaft. The acceleration sensor to be tested is connected to the host computer via the wireless data transmission module. The host computer determines the test accuracy based on the deviation between the acceleration signal and the speed signal output by the encoder. The above scheme has the advantages of simple structure, high test reliability, and high accuracy.

[0006] Reference 2 describes a device and method that uses a rotating turntable for detection. However, the detection device in Reference 2 requires a screw hole array, a counterweighted acceleration sensor, and counterweight bolts. This is because the turntable in Reference 2 requires an induction generator and a circuit unit. Installing these two devices on the turntable increases the weight on one side, resulting in uneven weight distribution. Therefore, a counterweight structure is required to reduce this effect. Secondly, the device in Reference 2 is only suitable for testing one sensor at a time and is not suitable for testing multiple sensors simultaneously. Furthermore, while a vehicle spends most of its time moving forward or in the forward direction, it can sometimes move backward or in the reverse direction when reversing. Therefore, the acceleration values ​​collected by the acceleration sensor on the vehicle include both positive and negative acceleration values. The sensor to be tested in Reference 2 cannot be reversed after installation, and only the sensor-collected value and the detected value can be compared in one direction; no reverse or negative acceleration values ​​can be obtained. The signals in Reference 2 are transmitted wirelessly, which is prone to delays or interference, resulting in errors in the actual acceleration values, reducing the actual detection accuracy. The degree of automation in Document 2 is low, and it is impossible to realize the installation of sensors to be inspected and to perform automatic and rapid inspection according to different types of sensors to be inspected. Summary of the Invention

[0007] The object of the present invention is to provide a centrifugal acceleration sensor detection device and a detection method thereof.

[0008] The present invention needs to solve at least the following technical problems:

[0009] (1) Ability to automatically detect multiple acceleration sensors simultaneously;

[0010] (2) Simplify the structure and omit the counterweight structure;

[0011] (3) It can realize automatic and rapid detection of different types of sensors to be tested.

[0012] To achieve the above-mentioned object, the present invention provides a centrifugal acceleration sensor detection device, comprising a frame, an intermediate platform installed in the frame, and a rotating platform installed on the intermediate platform;

[0013] The rotating platform is equipped with a motor drive mechanism, which drives the rotating platform to rotate. A number of fixtures are distributed on the rotating platform.

[0014] The fixture includes a swivel base and a contour seat fixedly mounted on the swivel base; the contour seat is provided with a contour groove for accommodating the sensor to be tested, and a side thrust mechanism for fixing the sensor to be tested is provided on the side of the contour groove; the side thrust mechanism includes a side thruster and a side thrust pressure plate connected to the side thruster telescopic rod; the contour seat is provided with a signal adapter, and the signal adapters configured on all fixtures are connected to the electric slip ring via a wiring harness, and the electric slip ring transmits the signal to the industrial control system;

[0015] The industrial control system controls the motor drive mechanism on the rotating platform through the servo driver, and the industrial control system controls the working conditions of the slewing base and the side thrust mechanism.

[0016] In the preferred embodiment of the present invention, the frame includes a base frame and an outer cover, the intermediate platform is installed on the base frame, the outer cover is snapped onto the upper part of the base frame to enclose the rotating platform inside, and an annular cover is provided between the rotating platform and the intermediate platform; an electrical interface and several side doors are arranged on the base frame, and the electrical interface is used to connect to external electrical equipment.

[0017] In a preferred embodiment of the present invention, 4-8 jigs are evenly distributed on the rotating platform, and each jig is fixed to the rotating platform by a jig mounting block and bolts.

[0018] In the preferred embodiment of the present invention, the side thruster is a side thrust cylinder or a side thrust electric cylinder, the side thrust pressure plate passes through the side groove of the contour seat and enters the contour groove, and the side thrust pressure plate presses the sensor to be inspected under the drive of the side thruster; the rotary base is a rotary cylinder or a CNC rotary table.

[0019] In the preferred embodiment of the present invention, the side thruster is a side thrust cylinder, and the rotary base is a rotary cylinder; a compressed air source is configured on the rotating platform, and each fixture is configured with an air pipe joint and an electromagnetic valve group connected to the compressed air source, which are connected to the side thrust cylinder and the rotary cylinder through the air pipe joint, and the working condition of the cylinder is controlled by the electronic valve group.

[0020] In a preferred solution of the present invention, the sensor to be tested is connected to the electric slip ring through a signal adapter, the electric slip ring is connected to the CDC continuous damping controller, the CDC continuous damping controller sends a signal to the CAN module, and the CAN module sends the received signal to the central control system.

[0021] In a preferred embodiment of the present invention, an operating button is provided on the rack, the operating button is connected to the industrial control system, a position code is provided on each fixture, and the industrial control system is equipped with a barcode scanner to scan the position code on each fixture.

[0022] The present invention discloses a detection method for an acceleration sensor, comprising the following steps:

[0023] Step S1: Pre-store a detection model corresponding to each sensor to be detected in the industrial control system, determine the type of the sensor to be detected, and automatically match the detection model that matches the type of the sensor to be detected based on the type of the sensor to be detected;

[0024] Step S2: Each sensor to be inspected is provided with an identity code, and each fixture is provided with a position code. A barcode scanner is used to scan the identity code on the sensor to be inspected and the position code of the corresponding fixture. The industrial control system associates the fixture position with the sensor to be inspected;

[0025] Step S3: All sensors to be tested are placed into the corresponding profiling slots in the jig. The industrial control system controls the side push mechanism to fix the sensors to be tested in the profiling slots according to the received test start command, and connects the sensors to be tested to the signal adapter.

[0026] Step S4: Determine whether all sensors to be tested are connected to the signal adapter. If connected, the industrial control system retrieves the detection model and determines the rotation speed of the rotating platform at each detection node from the detection model. The industrial control system then starts the rotating platform to perform the first detection.

[0027] After the first test is completed, the industrial control system controls the rotating platform to stop running, controls the slewing base to rotate 180 degrees, and then starts the rotating platform to rotate for the second test;

[0028] Step S5: During the rotation of the rotating platform, at each detection node, the data collected from the sensor to be detected is transmitted to the industrial control system through a signal adapter via a wiring harness and an electric slip ring to obtain an acceleration acquisition value Gn of each sensor to be detected; the acceleration acquisition value Gn is compared with the acceleration calculation value Gm calculated by the currently matched detection model to obtain a difference value Gx;

[0029] Step S6: Determine whether the difference Gx exceeds a threshold value, and obtain the detection result of the sensor to be detected.

[0030] Preferably, the types of sensors to be inspected include wheel acceleration sensors and vehicle body acceleration sensors; and the identity codes of the sensors to be inspected and the position codes of the fixtures are bar codes or QR codes.

[0031] Preferably, in the present invention, during the first or second detection process, the industrial control system controls the rotation speed of the rotating platform to gradually increase to the maximum speed as the detection time passes, and performs data collection once when the preset speed node is reached; the maximum speed during the detection process is 250rpm.

[0032] In summary, the present invention has the following advantages:

[0033] The rotating platform of the present invention is distributed with multiple jigs. Multiple sensors to be tested can be fixed through the profiling grooves of the jigs. The signals collected by the sensors to be tested can be ultimately sent to the industrial control system through the electric slip ring. The industrial control system can automatically match the detection model according to the type of the sensors to be tested and can complete the automated detection process from fixing the sensors to be tested to outputting the detection results according to the operating instructions. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] Figure 1 Schematic diagram of an acceleration sensor detection device according to one embodiment of the present invention;

[0035] Figure 2 Schematic diagram of an acceleration sensor detection device according to an embodiment of the present invention, wherein the outer cover is omitted;

[0036] Figure 3 A schematic diagram of a rotating platform and an annular cover according to an embodiment of the present invention;

[0037] Figure 4 This is a schematic diagram of the installation of the intermediate platform, the rotating platform and the fixture in one embodiment of the present invention;

[0038] Figure 5 A schematic diagram of the installation distribution of multiple fixtures in one embodiment of the present invention;

[0039] Figure 6 A schematic diagram of a fixture according to an embodiment of the present invention;

[0040] Figure 7 is a flow chart of a detection method in one embodiment of the present invention;

[0041] Figure 8 The figure is a schematic diagram of the appearance of a vehicle body acceleration sensor.

[0042] Among them, 1. bottom frame; 2. outer cover; 3. middle platform; 4. rotating platform; 5. fixture; 51. slewing base; 52. contour seat; 53. contour groove; 54. side thruster; 55. side thrust plate; 56. signal adapter; 57. mounting block; 58. side groove; 6. annular cover; 7. electrical interface; 8. side door; 9. sensor to be inspected; 10. air pipe joint; 11. operation button; 12. motor drive mechanism. DETAILED DESCRIPTION

[0043] refer to Figure 1 and Figure 2 The present invention provides a centrifugal acceleration sensor testing device, comprising a frame, an intermediate platform 3 mounted within the frame, and a rotating platform 4 mounted on the intermediate platform 3. The intermediate platform 3 has a large hole at its center, and the rotating platform 4 is positioned above this hole. The large hole facilitates the connection between the rotating shaft of the motor drive mechanism 12 and the rotating platform 4. The frame encloses the testing device and generally employs a plate frame structure with beams and columns to facilitate device installation and provide good stability. The frame of the present invention may include a base frame 1 and an outer cover 2. The intermediate platform 3 is mounted on the base frame 1. A mounting partition may be provided on the base frame 1, and the intermediate platform 3 may be placed on the mounting partition. The outer cover 2 snaps onto the top of the base frame 1, enclosing the rotating platform 4. An annular cover 6 is provided between the rotating platform 4 and the intermediate platform 3. The annular cover 6 provides a secondary seal for the internal electrical equipment. The base frame 1 is provided with an electrical interface 7 and several side doors 8. The electrical interface 7 is used to connect to external electrical equipment, such as an external power supply unit, to introduce power. The side doors can be opened to facilitate internal inspection and maintenance.

[0044] refer to Figure 2 、 Figure 3 and Figure 4 The rotating platform 4 is equipped with a motor drive mechanism, which is equipped with a servo drive. The present invention drives the rotating platform 4 to rotate by the motor drive mechanism. A number of jigs are distributed on the rotating platform 4. Preferably, 4-8 jigs are evenly distributed on the rotating platform 4, and more preferably, 6 or 8 jigs are distributed. Each jig is fixed to the rotating platform 4 by a jig mounting block 57 with bolts. The jig can fix various types of sensors 9 to be tested on the rotating platform 4. The present invention is provided with multiple jigs, and the multiple jigs are evenly distributed, which is conducive to the center of gravity of the entire rotating platform 4 still being located at the center of the circle or very close to the center of the circle.

[0045] refer to Figure 5 and Figure 6The fixture 5 includes a swivel base 51 and a contoured base 52 fixedly mounted on the swivel base 51. The swivel base 51 is designed to rotate 180 degrees, allowing forward detection before the swivel base 51 rotates and reverse detection after the 180-degree rotation. The contoured base 52 is provided with a contoured slot 53 for accommodating the sensor to be tested. The contoured slot 53 is a structure capable of accommodating the sensor to be tested, and a side thrust mechanism for securing the sensor to be tested is provided on the side of the contoured slot 53. The side thrust mechanism includes a side thruster 54 and a side thrust plate 55 connected to the telescopic rod of the side thruster 54. When the sensor to be tested is placed in the contoured slot 53, the side thruster 54 is extended and retracted to press the sensor to be tested into the direction of the signal converter to connect it to the signal converter. A signal adapter is provided on the contour seat 52. The signal adapters configured on all fixtures are connected to the electric slip ring through a wiring harness. The electric slip ring transmits the signal to the industrial control system, thereby enabling the rotating platform 4 to transmit the data of each sensor to be inspected to the industrial control system while rotating.

[0046] The industrial control system controls the motor drive mechanism on the rotating platform 4 through the servo driver, and the industrial control system controls the working conditions of the rotary base 51 and the side thrust mechanism.

[0047] In a preferred embodiment of the present invention, the side thruster 54 is a side thrust cylinder or a side thrust electric cylinder, and the side thrust plate 55 passes through the side groove 58 of the contour seat 52 and enters the contour groove 53. The side thrust plate 55 presses the sensor to be inspected under the drive of the side thruster 54; the rotary base 51 is a rotary cylinder or a CNC rotary table.

[0048] In a preferred embodiment of the present invention, the side thruster 54 is a side thrust cylinder, and the rotary base 51 is a rotary cylinder; a compressed air source is configured on the rotating platform 4, and each fixture is configured with an air pipe joint 10 and an electromagnetic valve group connected to the compressed air source, which are connected to the side thrust cylinder and the rotary cylinder through the air pipe joint 10, and the working condition of the cylinder is controlled by the electronic valve group.

[0049] In a preferred embodiment of the present invention, the sensor to be tested is connected to the electric slip ring through a signal adapter, the electric slip ring is connected to the CDC continuous damping controller, the CDC continuous damping controller sends the signal to the CAN module, and the CAN module sends the received signal to the central control system. Figure 8 The vehicle acceleration sensor of the present invention includes a wheel acceleration sensor installed on the wheel and a body acceleration sensor installed in the vehicle. The data or signal collected by the acceleration sensor needs to be decoded by the CDC continuous damping controller. The decoded data is communicated through the CAN module and can be transmitted to the industrial control system.

[0050] In a preferred embodiment of the present invention, an operation button 11 is provided on the frame, and the operation button 11 is connected to the industrial control system. A position code is provided on each fixture, and the industrial control system is equipped with a barcode scanner to scan the position code on each fixture. The operation button 11 of the present invention may include a start button, a pause button, a positive button, and a negative button; the start button can control the entire device to start testing, that is, to control the side push mechanism to fix the sensor to be tested from the beginning, the pause button can temporarily interrupt the testing process, the positive button can allow the swivel base 51 to rotate to the positive position, generally the positive position is the initial position, and the reverse button can allow the swivel base 51 to return to the reverse position or the negative position; the operation button of the present invention can be used for operation during experiments or machine testing, so as to facilitate more direct temporary operation of each step.

[0051] refer to Figure 7 The detection method of the present invention comprises the following steps:

[0052] Step S1: pre-store a detection model corresponding to each sensor to be detected in the industrial control system, determine the type of the sensor to be detected, and automatically match the detection model that matches the type of the sensor to be detected according to the type of the sensor to be detected.

[0053] During the detection process of the present invention, the characteristics of each sensor to be detected are different and the detection parameters required are not exactly the same. Therefore, a detection model is established in advance according to the type of each sensor to be detected. Specifically, the detection model of the present invention includes the following contents: the number of detection nodes of the type of sensor to be detected and the rotational speed of the rotating platform corresponding to each detection node. The detection node refers to a detection performed on the rotating platform when it reaches a certain rotational speed, and the acceleration acquisition value collected by the sensor to be detected itself is obtained. At the same time, the current rotational speed of the rotating platform and the radius parameters of the fixture and the rotating platform are obtained. The acceleration calculation value Gm can be calculated based on the rotational speed and radius parameters. The corresponding calculation method belongs to the prior art. Therefore, the detection model will include multiple detection nodes, and detection will be performed at different rotational speeds to obtain multiple sets of acceleration acquisition values ​​and acceleration calculation values ​​and other data.

[0054] Before testing, you need to pre-select the test model corresponding to the sensor to be tested. After the selection is completed, place the sensor to be tested in the fixture and start testing.

[0055] Step S2: Each sensor to be inspected is provided with an identity code, and each fixture is provided with a position code. A barcode scanner is used to scan the identity code on the sensor to be inspected and the position code of the corresponding fixture. The industrial control system associates the fixture position with the sensor to be inspected.

[0056] Because the present invention can simultaneously detect multiple sensors to be inspected, the industrial control system first sets an identity code for each sensor to be inspected in order to facilitate classification and identification of the data from each sensor to be inspected. Each fixture also has a fixed position code. In this way, during the automatic detection process, the data generated by each fixture can be automatically entered into the directory corresponding to the sensor to be inspected in the industrial control system, making it easy to view and export data. When scanning, the present invention can first scan the identity code of the sensor to be inspected, and then scan the position code on the fixture, thus completing the association between the two.

[0057] Step S3: Place all sensors to be tested into the corresponding contoured slots in the jig. The industrial control system controls the side push mechanism to fix the sensors to be tested in the contoured slots according to the received detection start command, and connects the sensors to be tested to the signal adapter.

[0058] After the sensors to be tested are placed in the contoured slots respectively, an instruction to start testing can be issued. After receiving the instruction, the industrial control system first controls the side thrust mechanism to connect the sensors to be tested with the signal adapter. After the signal adapter is connected, the acceleration collection values ​​collected by the sensors to be tested themselves can be transmitted to the industrial control system.

[0059] Step S4: Determine whether all sensors to be tested are connected to the signal adapter. After connection, the industrial control system retrieves the detection model and determines the rotation speed of the rotating platform at each detection node from the detection model; then the industrial control system starts the rotating platform to perform the first detection.

[0060] For example, in the detection model corresponding to the wheel acceleration sensor, the rotation speed of the rotating platform gradually increases from 0 to 250 rpm, and data collection is performed once every time the rotation speed increases by 10 rpm as a detection node. Each detection node will obtain an acceleration collection value and an acceleration calculation value.

[0061] After the first inspection is completed, the industrial control system controls the rotating platform to stop running, controls the slewing base to rotate 180 degrees, and then starts the rotating platform to rotate for the second inspection. The second inspection process, inspection nodes and inspection model are the same as the first inspection, except that the installation direction of the sensor to be inspected is opposite.

[0062] Step S5: During the rotation of the rotating platform, at each detection node, the data collected from the sensor to be detected is transmitted to the industrial control system through the signal adapter via the wiring harness and the electric slip ring to obtain the acceleration collection value Gn of each sensor to be detected; the acceleration collection value Gn is compared with the acceleration calculation value Gm calculated by the currently matched detection model to obtain the difference Gx.

[0063] Step S6: Determine whether the difference Gx exceeds a threshold value, and obtain the detection result of the sensor to be detected.

[0064] Preferably, the types of sensors to be inspected include wheel acceleration sensors and vehicle body acceleration sensors; and the identity codes of the sensors to be inspected and the position codes of the fixtures are bar codes or QR codes.

[0065] Preferably, in the present invention, during the first or second detection process, the industrial control system controls the rotation speed of the rotating platform to gradually increase to the maximum speed as the detection time passes, and performs data collection once when the preset speed node is reached; the maximum speed during the detection process is 250rpm.

[0066] Example 1: Operation process of a domestic enterprise's vehicle body acceleration sensor

[0067] Step S1: In the industrial control system, the sensor to be tested is selected as a vehicle body acceleration sensor, and the industrial control system automatically matches a detection model that matches the type of the sensor to be tested.

[0068] Step S2: Use a barcode scanner to scan the identity code on the sensor to be inspected and the position code of the corresponding fixture, and the industrial control system associates the fixture position with the sensor to be inspected.

[0069] Step S3: Place a sensor to be tested into the contoured slot in the corresponding fixture. The industrial control system controls the side push mechanism to fix the sensor to be tested in the contoured slot according to the received detection start instruction, and connects the sensor to be tested to the signal adapter.

[0070] Step S4: After all sensors to be tested are connected to the signal adapter, the industrial control system retrieves the detection model and determines the rotation speed of the rotating platform at each detection node from the detection model; then the industrial control system starts the rotating platform to perform the first detection.

[0071] After the first test is completed, the industrial control system controls the rotating platform to stop running, the industrial control system automatically controls the slewing base to rotate 180 degrees, and then starts the rotating platform to rotate for the second test.

[0072] Step S5: During the rotation of the rotating platform, at each detection node, the data collected from the sensor to be detected is transmitted to the industrial control system through the signal adapter via the wiring harness and the electric slip ring to obtain the acceleration collection value Gn of each sensor to be detected; the acceleration collection value Gn is compared with the acceleration calculation value Gm calculated by the currently matched detection model to obtain the difference Gx.

[0073] Step S6: Determine whether the difference Gx exceeds the threshold and obtain the test results of the sensor to be tested. The test nodes and test results are shown below. During this test, the radius R between the fixture and the center of the rotating platform is 0.3m. When the acceleration acquisition value Gn is within the upper limit Gn and lower limit Gn in the table, the sensor to be tested is judged to be qualified. If it is not between the upper limit Gn and lower limit Gn, it is judged to be unqualified.

[0074] Table 1: Detection parameters for the first detection - forward

[0075] Detection Node N (rpm) Acceleration acquisition value Acceleration calculation value Gn upper limit Gn lower limit 0 0 0 0 0.13 -0.13 1 10 0.03 0.03 0.04 0.03 2 20 0.13 0.13 0.14 0.13 3 30 0.31 0.30 0.32 0.29 4 40 0.55 0.54 0.57 0.51 5 50 0.83 0.84 0.88 0.80 6 60 1.18 1.21 1.27 1.15 7 70 1.69 1.65 1.73 1.57 8 80 2.20 2.15 2.26 2.04 9 90 2.81 2.72 2.86 2.59 10 100 3.45 3.36 3.53 3.20 11 110 4.12 4.07 4.27 3.87 12 120 4.95 4.84 5.09 4.60 13 130 5.75 5.68 5.97 5.40 14 140 6.75 6.59 6.92 6.26 15 150 7.67 7.57 7.95 7.19 16 160 8.83 8.61 9.04 8.18 17 170 9.72 9.72 10.21 9.23 18 180 10.90 10.90 11.44 10.35 19 190 12.14 12.14 12.75 11.53 21 200 13.45 13.45 14.13 12.78 21 210 14.83 14.83 15.57 14.09 22 220 15.98 15.98 16.78 15.18

[0076] It can be seen from the test results in Table 1 above that when the sensor to be tested is tested in the forward direction, the first test result can be considered qualified.

[0077] Table 2: Test parameters for the second test - reverse

[0078] Detection Node N (rpm) Acceleration acquisition value Acceleration calculation value Gn upper limit Gn lower limit 0 0 0.00 0.00 0.13 -0.13 1 10 -0.03 -0.03 -0.03 -0.04 2 20 -0.13 -0.13 -0.13 -0.14 3 30 -0.30 -0.30 -0.29 -0.32 4 40 -0.55 -0.54 -0.51 -0.57 5 50 -0.85 -0.84 -0.80 -0.88 6 60 -1.22 -1.21 -1.15 -1.27 7 70 -1.69 -1.65 -1.57 -1.73 8 80 -2.19 -2.15 -2.04 -2.26 9 90 -2.78 -2.72 -2.59 -2.86 10 100 -3.47 -3.36 -3.20 -3.53 11 110 -4.15 -4.07 -3.87 -4.27 12 120 -4.94 -4.84 -4.60 -5.09 13 130 -5.79 -5.68 -5.40 -5.97 14 140 -6.72 -6.59 -6.26 -6.92 15 150 -7.72 -7.57 -7.19 -7.95 16 160 -8.81 -8.61 -8.18 -9.04 17 170 -9.94 -9.72 -9.23 -10.21 18 180 -11.15 -10.90 -10.35 -11.44 19 190 -12.46 -12.14 -11.53 -12.75 21 200 -13.81 -13.45 -12.78 -14.13 21 210 -15.12 -14.83 -14.09 -15.57 22 220 -16.38 -15.98 -15.18 -16.78

[0079] It can be seen from the test results in Table 2 above that when the sensor to be tested performs reverse detection, the second test result can be considered qualified, so it can be concluded that the sensor to be tested is qualified.

[0080] The detection parameters in Table 1 and Table 2 are only the detection parameters of one sensor to be detected. If each detection includes multiple sensors to be detected, multiple groups of corresponding detection parameters will be formed.

[0081] Although the specific embodiments of the present invention are described in detail in conjunction with the accompanying drawings, this should not be construed as limiting the scope of protection of this patent. Within the scope described by the claims, various modifications and variations that can be made by those skilled in the art without creative work still fall within the scope of protection of this patent.

Claims

1. A centrifugal acceleration sensor detection device, characterized in that: It includes a frame, an intermediate platform installed in the frame, and a rotating platform installed on the intermediate platform; The rotating platform is equipped with a motor drive mechanism, which drives the rotating platform to rotate, and a plurality of fixtures are distributed on the rotating platform; The jig includes a swivel base and a contour seat fixedly mounted on the swivel base; the contour seat is provided with a contour groove for accommodating a sensor to be tested, and a side thrust mechanism for fixing the sensor to be tested is provided on the side of the contour groove; the side thrust mechanism includes a side thruster and a side thrust pressure plate connected to the side thruster telescopic rod; the contour seat is provided with a signal adapter, and the signal adapters configured on all jigs are connected to an electric slip ring via a wiring harness, and the electric slip ring transmits the signal to the industrial control system; The industrial control system controls the motor drive mechanism on the rotating platform through the servo driver, and the industrial control system controls the working conditions of the rotary base and the side thrust mechanism.

2. The centrifugal acceleration sensor detection device according to claim 1, characterized in that: The frame includes a bottom frame and an outer cover. The middle platform is installed on the bottom frame. The outer cover is buckled on the upper part of the bottom frame to enclose the rotating platform inside. An annular cover is provided between the rotating platform and the middle platform. An electrical interface and several side doors are arranged on the bottom frame. The electrical interface is used to connect to external electrical equipment.

3. The centrifugal acceleration sensor detection device according to claim 1, wherein: There are 4-8 jigs evenly distributed on the rotating platform, and each jig is fixed on the rotating platform by a jig mounting block and bolts.

4. The centrifugal acceleration sensor detection device according to claim 1, wherein: The side thruster is a side thrust cylinder or a side thrust electric cylinder. The side thrust pressure plate passes through the side groove of the profiling seat and enters the profiling groove. The side thrust pressure plate presses the sensor to be inspected under the drive of the side thruster. The rotary base is a rotary cylinder or a CNC rotary table.

5. The centrifugal acceleration sensor detection device according to claim 1, wherein: The side thruster is a side thrust cylinder, and the rotary base is a rotary cylinder; a compressed air source is configured on the rotating platform, and each fixture is configured with an air pipe joint and an electromagnetic valve group connected to the compressed air source, which are connected to the side thrust cylinder and the rotary cylinder through the air pipe joint, and the working condition of the cylinder is controlled by the electronic valve group.

6. The centrifugal acceleration sensor detection device according to claim 1, wherein: The sensor to be tested is connected to the electric slip ring through a signal adapter, the electric slip ring is connected to the CDC continuous damping controller, the CDC continuous damping controller sends a signal to the CAN module, and the CAN module sends the received signal to the central control system.

7. The centrifugal acceleration sensor detection device according to claim 1, wherein: The rack is provided with an operation button, which is connected to the industrial control system. Each fixture is provided with a position code, and the industrial control system is equipped with a barcode scanner to scan the position code on each fixture.

8. A detection method using the centrifugal acceleration sensor detection device according to any one of claims 1 to 7, characterized in that: The following steps are involved: Step S1: Pre-store a detection model corresponding to each sensor to be detected in the industrial control system, determine the type of the sensor to be detected, and automatically match the detection model that matches the type of the sensor to be detected based on the type of the sensor to be detected; Step S2: Each sensor to be inspected is provided with an identity code, and each fixture is provided with a position code. A barcode scanner is used to scan the identity code on the sensor to be inspected and the position code of the corresponding fixture. The industrial control system associates the fixture position with the sensor to be inspected; Step S3: All sensors to be tested are placed into the corresponding profiling slots in the jig. The industrial control system controls the side push mechanism to fix the sensors to be tested in the profiling slots according to the received test start command, and connects the sensors to be tested to the signal adapter. Step S4: Determine whether all sensors to be tested are connected to the signal adapter. If connected, the industrial control system retrieves the detection model and determines the rotation speed of the rotating platform at each detection node from the detection model. The industrial control system then starts the rotating platform to perform the first detection. After the first test is completed, the industrial control system controls the rotating platform to stop running, controls the slewing base to rotate 180 degrees, and then starts the rotating platform to rotate for the second test; Step S5: During the rotation of the rotating platform, at each detection node, the data collected from the sensor to be detected is transmitted to the industrial control system through the signal adapter via the wiring harness and the electric slip ring to obtain the acceleration collection value Gn of each sensor to be detected; Compare the acceleration acquisition value Gn with the acceleration calculation value Gm calculated by the currently matched detection model to obtain the difference Gx; Step S6: Determine whether the difference Gx exceeds a threshold value, and obtain the detection result of the sensor to be detected.

9. The detection method according to claim 7, wherein: The types of the sensors to be inspected include wheel acceleration sensors and vehicle body acceleration sensors; the identity codes of the sensors to be inspected and the position codes of the fixtures are bar codes or QR codes.

10. The detection method according to claim 7, wherein: During the first or second inspection, the industrial control system controls the rotation speed of the rotating platform to gradually increase to the maximum speed as the inspection time increases, and performs data collection when the preset speed node is reached; the maximum speed during the inspection process is 250rpm.

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