Sensor testing device
By using a moving rod in the sensor testing device to change the distance between the sensor and the obstacle, the problem of inaccurate sensor test results in the prior art is solved, enabling a more accurate simulation of vehicle reversing conditions and improving the accuracy of test results.
Patent Information
- Application Number
- CN202423040459.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-09
- Publication Date
- 2026-01-02
- Estimated Expiration
- 2034-12-09
AI Technical Summary
In the existing technology, the testing device for automotive reversing radar sensors cannot simulate the real working condition of the constantly changing distance between the sensor and the obstacle, resulting in inaccurate test results.
Design a sensor testing device that uses a moving rod inside a test chamber to move the rod closer to or further away from the sensor transceiver unit, thereby changing the distance between the sensor and the obstacle and simulating the real working conditions during a vehicle reversing.
This improves the accuracy of sensor test results, enabling a more realistic simulation of distance changes during vehicle reversing and enhancing test accuracy.
Smart Images
Figure CN223756904U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to the production technical field of ultrasonic sensor, specifically is a sensor testing device. BACKGROUND
[0002] At present, the sensor used for automobile reversing generally adopts ultrasonic sensor, and the working principle of the ultrasonic sensor is that ultrasonic waves are emitted by the emitter, are reflected back when encountering an obstacle, and are then received by the receiver; the distance from the target object can be calculated by measuring the time difference between emission and reception; the quality of the ultrasonic sensor will directly affect the accuracy of measurement; therefore, the ultrasonic sensor needs to be detected in performance before leaving the factory.
[0003] The document with the title "an automobile reversing radar sensor electromagnetic compatibility test auxiliary device" (document number CN216622680U) discloses a technical scheme for simulating an obstacle, fixes the reversing radar sensor on the sensor support, uses the pipe cover to simulate a fixed obstacle, uses the pipe cover as the detection object of the reversing radar sensor, and realizes the actual detection working condition of the reversing radar; in the above document, the position of the pipe cover as the obstacle is fixed, the detection working condition of the radar sensor is single, the real working condition that the distance between the sensor and the obstacle changes constantly during the whole reversing process cannot be simulated, and the test result of the sensor may be inaccurate. UTILITY MODEL CONTENT
[0004] The utility model aims at providing a sensor testing device, which simulates the real working condition in the vehicle reversing process by constantly changing the distance between the sensor and the obstacle, so as to improve the accuracy of the sensor test result.
[0005] The utility model can realize the following technical scheme: a sensor testing device, one side of a test box body is provided with a through hole for placing a sensor shell, a moving rod for approaching or moving away from a sensor transceiver unit is slidably arranged inside the test box body, and the sensor transceiver unit faces the moving rod.
[0006] Compared with the prior art, the utility model has the following beneficial effects:
[0007] By driving the moving rod to move along the direction of approaching or moving away from the sensor transceiver unit, the distance between the sensor and the moving rod is changed to simulate the real working condition in the vehicle reversing process, so as to improve the accuracy of the sensor test result. BRIEF DESCRIPTION OF DRAWINGS
[0008] Figure 1 、 Figure 2 It is a structural schematic view of the sensor;
[0009] Figure 3The utility model discloses an external structure schematic diagram of the utility model;
[0010] Figure 4 For Figure 3 The partial close -up drawing of B area in middle;
[0011] Figure 5 、 Figure 6 The utility model discloses an internal structure schematic diagram of the test box of the utility model;
[0012] Figure 7 For Figure 6 The partial close -up drawing of C area in middle. Specific implementation
[0013] Please refer to Figures 1-2 As shown in the figure, in order to better illustrate the utility model, the basic composition of sensor is briefly explained first: sensor A includes the sensor shell A1 that is cylindrical as a whole, the sensor transceiver unit A2 is arranged at the front cavity end of the sensor shell A1, the rear end of the sensor shell A1 is the sealing glue plug cover A3, and the rear section of the sensor shell A1 is connected with the tubular terminal block A4.
[0014] Please refer to Figures 3-7 As shown in the figure, a kind of sensor testing device, the through hole 11 for the sensor shell A1 is placed into is provided in the side of test box 10, mobile rod 20 for being close to or away from sensor transceiver unit A2 is slidably arranged in test box 10, and sensor transceiver unit A2 faces mobile rod 20;
[0015] In the above scheme, the aperture of through hole 11 is matched with the outer diameter of the cylindrical sensor shell A1, when working, the suction cup on the mechanical hand is adsorbed on the surface of sealing glue plug cover A3, and under the driving of the mechanical hand, the sensor shell A1 is inserted into through hole 11, so that sensor transceiver unit A2 faces the inside of test box 10, and then the terminal of test instrument is inserted into terminal block A4, after that, mobile rod 20 is driven to move along the direction of being close to or away from sensor transceiver unit A2 by driving element, sensor transceiver unit A2 calculates the distance between sensor A and mobile rod 20 by receiving the ultrasonic signal reflected by mobile rod 20;The distance between sensor A and mobile rod 20 is changed to simulate the real working condition in the process such as reversing of vehicle movement in the application, to improve the accuracy of sensor A test result.
[0016] Preferably, the moving rod 20 is vertically arranged on the bottom of the test box 10, and the rod core of the moving rod 20 is coplanar with the hole core of the through hole 11; such arrangement ensures that the ultrasonic wave signal emitted by the sensor transceiver unit A2 can be directly transmitted to the surface of the moving rod 20 and then reflected to the sensor transceiver unit A2, and then the driving element drives the moving rod 20 to move close to or away from the sensor transceiver unit A2 to simulate the actual working condition in the vehicle moving process such as reversing, so as to improve the accuracy of the test result of the sensor A.
[0017] Further, the guide rail 21 is installed on the bottom of the test box 10, and the bottom end of the moving rod 20 is connected with the sliding block 22, and the sliding block 22 and the guide rail 21 form a sliding fit along the length direction of the guide rail 21; the cooperation of the sliding block 22 and the guide rail 21 provides a guide for the moving path of the moving rod 20, and ensures the stable displacement of the moving rod 21 on the inner wall of the bottom of the test box 10, so as to simulate the real working condition that the distance between the sensor and the obstacle changes constantly in the whole reversing process.
[0018] The sliding block 22 is connected with the motor through a transmission mechanism, and the motor drives the sliding block 22 to make linear reciprocating motion along the guide rail 21; the transmission mechanism can be composed of a speed reducer and a screw nut mechanism; specifically, the motor output shaft is connected with the speed reducer input shaft, the speed reducer output shaft is connected with the screw rod, the motor drives the screw rod to rotate through the speed reducer, the screw rod drives the nut block to make linear motion, the nut block drives the sliding block 22 to make linear motion along the guide rail 21, and then the driving of the moving rod 20 is realized.
[0019] Further, the inner wall of the test box 10 is provided with the sound-absorbing cotton 30; the sound-absorbing cotton 30 is used to shield the test box 10 from absorbing the ultrasonic wave signal of the sensor A, so as to avoid false measurement of the sensor A; the surface of the moving rod 20 is not shielded by the sound-absorbing cotton 30, and can reflect the ultrasonic wave emitted by the sensor transceiver unit A2.
[0020] The diameter of the moving rod 20 is greater than the diameter of the through hole 11; such arrangement enables the ultrasonic wave emitted by the sensor transceiver unit A2 to be accurately emitted to the rod surface of the moving rod 20, so as to reflect the ultrasonic wave emitted by the sensor transceiver unit A2 back to the sensor transceiver unit A2.
Claims
1. A sensor testing device, characterized by: One side of the test box (10) is provided with a through hole (11) for placing the sensor shell (A1), a moving rod (20) for approaching or moving away from the sensor transceiver unit (A2) is slidably arranged inside the test box (10), and the sensor transceiver unit (A2) faces the moving rod (20).
2. The sensor testing device of claim 1, wherein: The moving rod (20) is vertically arranged on the bottom of the test box (10), and the rod core of the moving rod (20) is coplanar with the hole core of the through hole (11).
3. The sensor testing device of claim 2, wherein: A guide rail (21) is installed on the bottom of the test box (10), the bottom end of the moving rod (20) is connected with a sliding block (22), and the sliding block (22) and the guide rail (21) form a sliding fit along the length direction of the guide rail (21).
4. The sensor testing device of claim 3, wherein: The sliding block (22) is connected with a motor through a transmission mechanism, and the motor drives the sliding block (22) to do linear reciprocating motion along the guide rail (21).
5. The sensor testing device of claim 1 or 2, wherein: The inner wall of the test box (10) is provided with sound-absorbing cotton (30).
6. The sensor testing device of claim 2 or 3 or 4, wherein: The rod diameter of the moving rod (20) is greater than the hole diameter of the through hole (11).