Detection jig for vehicle acceleration sensor

Abstract

The utility model discloses a vehicle acceleration sensor detection tool comprising an installation block, a rotation cylinder is arranged on the installation block, and the rotation cylinder is provided with an air pipe joint and an electromagnetic valve group; a profiling seat is fixed on the rotary air cylinder, a profiling groove for accommodating a to-be-detected sensor is formed in the profiling seat, and a side pushing mechanism for fixing the to-be-detected sensor is arranged on the side edge of the profiling groove; the side pushing mechanism comprises a side pushing device and a side pushing pressing plate connected with a telescopic rod of the side pushing device. The profiling seat is provided with a signal adapter, and the signal adapters of all the jigs are connected with the electric slip ring through wire harnesses. According to the utility model, the to-be-detected sensor is placed through the profiling seat and the profiling groove, automatic fixation and control are realized through the side pushing mechanism, forward and reverse bidirectional detection modes can be realized through the rotary cylinder, and the signal adapter is arranged in the profiling groove, so that the hobbies of the to-be-detected sensor can be directly transmitted through the electric slip ring. Convenience and rapidness are achieved, and automatic control is achieved conveniently.

Description

Technical Field

[0001] This utility model relates to auxiliary equipment for inspecting automotive sensors, specifically to a vehicle acceleration sensor detection fixture. Background Technology

[0002] With the development of the automotive industry, vibrations generated during vehicle operation have become a major obstacle to automotive development. Severe vibrations during vehicle operation reduce comfort, stability, and safety, diminishing the passenger experience and significantly shortening the lifespan of automotive components. Accelerometers, as the primary sensors for measuring vehicle vibration and longitudinal acceleration, are becoming increasingly important; therefore, the post-production testing of accelerometers requires testing their acceleration accuracy.

[0003] Existing technologies already include corresponding testing equipment for sensors. For example, document 1 (CN 116859085A) discloses a testing device for an accelerometer, comprising: a test plate for fixing the sensor body; a moving mechanism connected to the test plate for moving the test plate; and a testing instrument mounted on the test plate, which can be signal-connected to the sensor body for displaying the test parameters of the sensor body. In this invention, the user mounts the accelerometer on the testing instrument. When testing the accelerometer, the user controls the drive mechanism to move the lifting mechanism horizontally, thereby causing the lifting mechanism to move the test plate along a preset sliding track. The test plate then moves the testing instrument and the accelerometer at a preset acceleration, causing the accelerometer to display test parameters, which the user then reads.

[0004] Reference 2: CN201910992870.4 discloses an accelerometer testing device and method, including a host computer, a servo motor, an induction generator, a circuit unit, and a turntable. The output shaft of the servo motor is connected to the induction generator, the turntable is mounted on the output shaft of the servo motor, the circuit unit is embedded in the turntable, the accelerometer under test is mounted on the circuit unit, and the turntable is equipped with a counterweight accelerometer 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 provide it to the accelerometer under test and the wireless data transmission module. An encoder is installed on the output shaft of the servo motor. The accelerometer under test is connected to the host computer via the wireless data transmission module. The host computer obtains the test accuracy based on the deviation between the acceleration signal and the rotational speed signal output by the encoder. The above scheme has the advantages of simple structure, high test reliability, and high accuracy.

[0005] Reference 3: CN202122036636.X discloses an accelerometer sensor detection device, specifically relating to the field of measuring instrument technology. It includes a test bench, a mounting base fixedly connected to the upper surface of the test bench, a fixed plate slidably disposed inside the mounting base, a sensor body fixedly mounted on one side of the fixed plate, a data acquisition device fixedly connected to the upper surface of the sensor body, and support plates symmetrically arranged on both sides of the upper surface of the test bench near the mounting base. A driving device is fixedly connected to the outer side of one of the support plates, and a rotating shaft is rotatably connected between the two support plates via a bearing. An impact device is fixedly connected to the middle of the rotating shaft. This invention can transmit stable and continuous impacts to the accelerometer sensor fixed on the fixed plate and collect relevant data to detect the sensor's impact resistance. The mounting base can fix the fixed plate and maintain the stability of the sensor body when subjected to impacts.

[0006] As can be seen from the three documents mentioned above, the testing equipment must use a certain method to fix the sensor under test. The fixing methods of the sensor under test in the three documents are very simple, which is not conducive to rapid assembly and fixing, nor to meeting the requirements of automated assembly and testing. In addition, the fixing methods in the existing technology cannot allow the fixed sensor under test to be rotated; they can only realize detection in the positive direction and cannot perform detection in the reverse or negative direction after rotation. Utility Model Content

[0007] The purpose of this invention is to provide a vehicle acceleration sensor detection fixture.

[0008] The present invention aims to solve the following technical problems:

[0009] (1) It can improve the automated loading capability of the sensor under test and can cooperate with the testing equipment to complete the automated control.

[0010] (2) It can rotate the fixed sensor under test by 180°, so that the forward and reverse directions of the sensor under test can be detected.

[0011] (3) It can facilitate the external transmission of the signal data collected by the sensor under test.

[0012] To achieve the above objectives, one embodiment of this utility model provides a vehicle acceleration sensor testing fixture, including a mounting block. A rotary cylinder is mounted on the mounting block, and the rotary cylinder is equipped with an air pipe connector and a solenoid valve assembly. A contouring seat is fixed on the rotary cylinder, and the contouring seat has a contouring groove for accommodating the sensor under test. A side-push mechanism for fixing the sensor under test is provided on the side of the contouring groove. The side-push mechanism includes a side-push actuator and a side-push pressure plate connected to the telescopic rod of the side-push actuator. A signal adapter is provided on the contouring seat, and all signal adapters configured on the fixture are connected to an electric slip ring via a wiring harness. The side-push actuator of this utility model can be a side-push cylinder or a side-push electric cylinder.

[0013] In a preferred embodiment of this utility model, the mounting block is provided with several bolt holes, and the mounting block is fixed to the platform of the testing equipment by bolts, and the rotary cylinder is fixed to the mounting block by bolts.

[0014] In a preferred embodiment of this invention, a connecting plate is provided between the rotary cylinder and the contouring seat, and a label with a position code is provided on the contouring seat.

[0015] In a preferred embodiment of this utility model, a position sensor is provided inside the contour base. The position sensor detects the position of the sensor to be tested and is connected to an indicator light.

[0016] In a preferred embodiment of this utility model, a side-push support plate is provided on the side wall of the contour seat, one end of the side pusher is fixed on the side-push support plate, and the other end is fixed with a ring clamp.

[0017] In a preferred embodiment of this invention, a limiting part is provided on one side of the contour groove.

[0018] In summary, this utility model has the following advantages:

[0019] This invention places the sensor under test in a contoured seat and contoured groove, and achieves automated fixing and control through a side-pushing mechanism. It can also achieve bidirectional detection in both forward and reverse directions through a rotary cylinder. Furthermore, a signal converter is set in the contoured groove to directly transmit the sensor's signal through an electric slip ring, which is convenient, fast, and easy to achieve automated control. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of a fixture in one embodiment of the present invention;

[0021] Figure 2 This is a schematic diagram of the fixture in one embodiment of the present invention.

[0022] The components include: 1. Mounting block; 2. Rotary cylinder; 3. Contouring seat; 4. Contouring groove; 5. Side pusher; 6. Side push pressure plate; 7. Signal converter; 8. Connecting plate; 9. Label; 10. Indicator light; 11. Side push support plate; 12. Ring clamp; 13. Limiting part; 14. Air pipe connector; 15. Sensor to be tested. Detailed Implementation

[0023] This utility model provides a vehicle acceleration sensor testing fixture, including a mounting block 1. A rotary cylinder 2 is mounted on the mounting block 1, and the rotary cylinder 2 is equipped with an air pipe connector 14 and a solenoid valve assembly. Preferably, the mounting block 1 has several bolt holes, and the mounting block is fixed to the platform of the testing equipment by bolts. The rotary cylinder is also fixed to the mounting block by bolts. The combination of the rotary cylinder, air pipe connector, and solenoid valve assembly is existing technology, enabling rotation when needed. The rotary cylinder is designed to achieve 180° rotation, allowing for forward detection before rotation and reverse detection after 180° rotation.

[0024] A contouring seat 3 is fixed on the rotary cylinder 2. The contouring seat 3 has a contouring groove 4 for accommodating the sensor to be tested. A side push mechanism for fixing the sensor to be tested is provided on the side of the contouring groove. The side push mechanism includes a side pusher 5 and a side push pressure plate 6 connected to the telescopic rod of the side pusher. A signal adapter 7 is provided on the contouring seat. All signal adapters configured on the fixture are connected to the electric slip ring through a wiring harness.

[0025] After the sensor under test is placed in the contour slot, the side pusher extends and retracts to press the sensor into the direction of the signal converter, thus connecting it to the signal adapter. The contour base is equipped with a signal adapter, which is connected to an electric slip ring via a wiring harness. The electric slip ring transmits the signal to the industrial control system. The slip ring allows this fixture to be used with testing equipment that uses centrifugal force for detection, enabling the data from each sensor under test to be transmitted to the industrial control system even while the rotating platform of the testing equipment is rotating.

[0026] In an optimized embodiment of this utility model, a connecting plate 8 is provided between the rotary cylinder and the contouring seat. The connecting plate serves to elevate the fixture and also facilitates the design of structures such as mounting screw holes, providing locations for openings for installation. A label 9 with a location code is provided on the contouring seat, allowing operators to easily identify the code of each fixture.

[0027] In an optimized embodiment of this invention, a position sensor is installed inside the conformal base. The position sensor detects the position of the sensor under test and is connected to an indicator light 10. When the sensor under test reaches the designated position, the position sensor triggers a signal that illuminates the indicator light, indicating that the position of the sensor under test is appropriate.

[0028] In an optimized embodiment of this utility model, a side-push support plate is provided on the side wall of the contouring seat. One end of the side pusher is fixed to the side-push support plate 11, and the other end is fixed with a ring clamp 12. A limit part 13 is provided on one side of the contouring groove to limit the maximum position of the sensor under test 15 being squeezed and pushed, so as to avoid damage to the signal converter.

[0029] Although specific embodiments of this utility model have been described in detail with reference to the accompanying drawings, this should not be construed as limiting the scope of protection of this patent. Various modifications and variations that can be made by those skilled in the art without inventive effort within the scope described in the claims still fall within the scope of protection of this patent.

Claims

1. A vehicle acceleration sensor detection fixture, characterized in that: The fixture includes a mounting block, on which a rotary cylinder is mounted. The rotary cylinder is equipped with an air pipe connector and a solenoid valve assembly. A contouring seat is fixed on the rotary cylinder. The contouring seat has a contouring groove for accommodating the sensor under test. A side push mechanism for fixing the sensor under test is provided on the side of the contouring groove. The side push mechanism includes a side pusher and a side push pressure plate connected to the telescopic rod of the side pusher. A signal adapter is provided on the contouring seat. All signal adapters configured on the fixture are connected to an electric slip ring via a wiring harness.

2. The vehicle acceleration sensor detection fixture as described in claim 1, characterized in that: The mounting block is provided with several bolt holes. The mounting block is fixed to the platform of the testing equipment by bolts, and the rotary cylinder is fixed to the mounting block by bolts.

3. The vehicle acceleration sensor detection fixture as described in claim 1, characterized in that: A connecting plate is provided between the rotary cylinder and the contouring seat, and a label with a position code is provided on the contouring seat.

4. The vehicle acceleration sensor detection fixture as described in claim 1, characterized in that: A position sensor is installed inside the contour base. The position sensor detects the position of the sensor under test and is connected to an indicator light.

5. The vehicle acceleration sensor detection fixture as described in claim 1, characterized in that: A side-push support plate is provided on the side wall of the contour seat. One end of the side pusher is fixed to the side-push support plate, and the other end is fixed with a ring clamp.

6. The vehicle acceleration sensor detection fixture as described in claim 1, characterized in that: A limiting part is provided on one side of the contour groove.

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