Testing device for sensor

Abstract

The utility model relates to the technical field of sensor testing, in particular to a testing device for a sensor, which comprises a testing table, and the testing table is provided with a mounting assembly for mounting a stroke sensor, a pressure applying assembly for applying a force to the stroke sensor and a detection assembly for detecting an output signal value of the stroke sensor. The pressure applying assembly comprises a pressure head and a driving part used for driving the pressure head to move back and forth, the moving direction of the pressure head is parallel to the length direction of the stroke sensor, and the pressure head can abut against the stroke sensor. According to the invention, the stroke sensor elements can be directly tested in batches.

Description

Technical Field

[0001] The present application relates to the technical field of sensor testing, and in particular to a sensor testing device. Background Art

[0002] The brake pedal travel sensor is an important part of the vehicle's brake assist system. When the pedal is braked, a travel is generated. The travel sensor can detect the travel and convert it into the corresponding force and then feed it back to the main control system, so that the main control system can obtain the driver's braking intention and then perform braking control.

[0003] The brake pedal travel sensor needs to be calibrated. Usually, the calibration method mostly adopts two-point calibration or multi-point calibration, that is, select two or more known position points, record the corresponding values ​​of the sensor output, compare the input value and output value of the position point with the standard data, and judge whether they are consistent. If they are consistent, the test is successful.

[0004] The Chinese patent publication number is CN116753827A, and the publication date is September 15, 2023. The name of the invention is a calibration method for a brake pedal travel sensor. The application builds a simulated coordination system between a hydraulic control unit and an automobile pedal assembly. The hydraulic control unit generates pressure on the push rod of the automobile pedal assembly at different calibration points, and then detects the various signal values ​​generated by the travel sensor in the automobile pedal assembly after being subjected to force for calibration.

[0005] However, the above calibration method is aimed at an automobile pedal assembly, which is a collection of multiple parts and has a certain volume and weight, making it very inconvenient to quickly test a large number of brake pedal travel sensors. Utility Model Content

[0006] In order to facilitate rapid testing of a large number of brake pedal travel sensors, the present application provides a sensor testing device that directly tests the brake pedal travel sensor elements and is more suitable for batch testing.

[0007] The present application provides a sensor testing device, which adopts the following technical solution:

[0008] A sensor testing device includes a test bench, on which are provided an installation component for installing a stroke sensor, a pressure component for applying force to the stroke sensor, and a detection component for detecting an output signal value of the stroke sensor. The pressure component includes a pressure head and a driving part for driving the pressure head to move back and forth. The moving direction of the pressure head is parallel to the length direction of the stroke sensor, and the pressure head can abut against the stroke sensor.

[0009] By adopting the above technical solution, the stroke sensor element can be directly installed on the mounting assembly, and the pressure-applying assembly applies a certain pressure to the stroke sensor element to make the stroke sensor produce a certain stroke. While the stroke is produced, the detection assembly can detect the output signal of the stroke sensor and compare the output signal with the standard signal. If the comparison is consistent, the detection is passed; the detection device can directly perform detection of each stroke on the stroke sensor element, and batch detection is more convenient.

[0010] Optionally, the mounting assembly is configured as a fixture fixedly mounted on a test bench, the fixture is provided with a mounting groove for plugging in a travel sensor, the length direction of the mounting groove is parallel to the length direction of the travel sensor, and one end of the travel sensor away from the pressure assembly can abut against the inner wall of the mounting groove.

[0011] By adopting the above technical solution, the stroke sensor can be placed in the installation groove of the fixture, and when the pressure-applying component abuts against the stroke sensor, the inner wall of the installation groove can limit it, so that the stroke sensor can generate a stroke under the action of the corresponding external force, which is conducive to more accurate detection results; there is no need to adopt conventional clamping methods to clamp the stroke sensor, which is conducive to improving the installation speed of the stroke sensor and the detection speed.

[0012] Optionally, two inner walls opposite to each other of the installation groove are provided with clearance grooves, the clearance grooves are connected to the installation groove, and the length of the clearance grooves is smaller than the length of the installation groove.

[0013] By adopting the above technical solution, the opening of the clearance groove can allow the operator's fingers to enter, thereby facilitating the removal and placement of the travel sensor.

[0014] Optionally, the detection component includes a probe for collecting the output signal of the stroke sensor, a detection system for analyzing whether the output signal of the stroke sensor is normal, and a display for displaying the detection data, and the probe and the display are both electrically connected to the detection system; the probe is fixedly arranged on the side wall of the pressure head facing the stroke sensor, and the probe is electrically connected to the detection system; the probe is connected to the signal output area of ​​the stroke sensor when the pressure head is pressed against the stroke sensor.

[0015] By adopting the above technical solution, when the pressure head abuts against the stroke sensor and causes the stroke sensor to produce a certain stroke, the probe can synchronously detect the output signal of the stroke sensor, so that when the stroke sensor is installed on the fixture, there is no need to additionally connect to the detection system, thereby reducing the operating steps and helping to speed up the detection efficiency.

[0016] Optionally, the detection component further includes a plurality of signal lights capable of feeding back the test results, the signal lights are all electrically connected to the detection system, and the signal lights are fixedly arranged on the edge of the upper surface of the test bench.

[0017] By adopting the above technical solution, the signal light can intuitively prompt the test results. The operator can timely understand whether the test process is completed and the final result of the test process by observing the signal light, and remind the operator to proceed to the next round of testing, which is conducive to speeding up the detection efficiency.

[0018] Optionally, the driving unit includes a motor fixed in the test bench and an electric slide fixed to the motor, the sliding direction of the electric slide is parallel to the length direction of the stroke sensor, a sliding plate is fixedly provided at the sliding end of the electric slide, the pressure head is fixedly connected to the upper surface of the sliding plate, and the motor is electrically connected to the detection system.

[0019] By adopting the above technical solution, the detection system can control the motor, and the motor can control the electric slide, the sliding plate and the pressure head to move synchronously to corresponding distances, thereby realizing the pressure head applying force to the stroke sensor.

[0020] Optionally, a sliding groove is provided on the upper surface of the test bench, and the sliding plate can be slidably connected in the sliding groove along the length direction of the stroke sensor; the sliding plate abuts against the inner wall of the sliding groove away from the stroke sensor when in an undetected state.

[0021] By adopting the above technical solution, the sliding groove can provide guidance and limiting functions for the sliding plate, which is conducive to smoother sliding of the sliding plate and reduces the probability of the sliding plate falling off the track.

[0022] Optionally, a displacement sensor transmitting end is fixedly disposed on the motor, a displacement sensor receiving end is fixedly disposed on the sliding plate, and the displacement sensor transmitting end is electrically connected to the detection system.

[0023] By adopting the above technical solution, the displacement sensor can detect the sliding distance of the sliding plate, which is helpful to verify the pressure distance of the pressure head on the stroke sensor and is helpful to improve the accuracy of the detection.

[0024] In summary, the present application includes at least one of the following beneficial technical effects:

[0025] 1. It can directly apply pressure to the stroke sensor element and make it produce a certain stroke. While producing the stroke, the detection component can detect the output signal of the stroke sensor and compare the output signal with the standard signal. If the comparison is consistent, the detection is passed;

[0026] 2. The probe is set on the pressure head, so that the pressure head can collect the output signal of the stroke sensor while applying force, so that the stroke sensor does not need to be connected to the detection system when installed, and batch detection is more convenient. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1It is an overall diagram of an embodiment of the present application.

[0028] Figure 2 yes Figure 1 An enlarged view of the device is used to show the structure of the installation components and some detection components.

[0029] Figure 3 It is a schematic diagram of the exploded structure of an embodiment of the present application, used to show the internal structure of the test bench.

[0030] Explanation of the reference numerals in the accompanying drawings: 1. test bench; 101. machine body; 102. cover body; 103. through slot; 104. sealing plate; 105. sliding slot; 2. mounting assembly; 201. fixture; 202. mounting slot; 203. clearance slot; 3. pressure assembly; 301. pressure head; 302. driving unit; 303. motor; 304. electric slide; 305. connecting column; 306. sliding plate; 307. displacement sensor transmitting end; 308. displacement sensor receiving end; 4. detection assembly; 401. probe; 402. detection system; 403. display; 404. signal light. DETAILED DESCRIPTION

[0031] The following is combined with Figures 1 to 3 This application is described in further detail.

[0032] The present application embodiment discloses a sensor testing device, referring to Figure 1 , including a test bench 1, on which are arranged a mounting assembly 2 for mounting a stroke sensor, a pressure assembly 3 for applying force to the stroke sensor, and a detection assembly 4 for detecting the output signal value of the stroke sensor. When the pressure assembly 3 applies force to the stroke sensor to make it produce a stroke within a specified range, the stroke sensor will feedback a signal value, and the detection assembly 4 is used to collect the feedback signal value, and the stroke of the stroke sensor and the corresponding signal value are analyzed, and compared with the standard data, if they are consistent, the test is passed.

[0033] To improve the detection efficiency, the mounting assembly 2 and the pressure assembly 3 can be arranged in several groups, and the several mounting assemblies 2 and the several pressure assemblies 3 correspond one to one, and the several pressure assemblies 3 can be electrically connected to the detection assembly 4 so that the same test bench 1 can simultaneously detect multiple travel sensors. In the embodiment of the present application, two groups of mounting assemblies 2 and two groups of pressure assemblies 3 are arranged on the same test bench 1.

[0034] Reference Figure 1 and Figure 2The test bench 1 includes a body 101 and a cover 102 fixed to the upper surface of the body 101. The mounting assembly 2 can be set as a clamping structure or a clamping structure, that is, the stroke sensor is tightened and fixed by bolts and other components. In the embodiment of the present application, the mounting assembly 2 is set as a fixture 201 that is detachably connected to the cover 102 by screws, and a mounting groove 202 is fixedly opened on the upper surface of the fixture 201, and the mounting groove 202 is set through the side wall of one side facing the pressure component 3. The length direction of the mounting groove 202 is parallel to the length direction of the stroke sensor, and the mounting groove 202 can adapt to the shape of the stroke sensor, so that the stroke sensor can be plugged into the mounting groove 202. The two opposite inner walls of the mounting groove 202 are both provided with a clearance groove 203, the length of the clearance groove 203 is less than the length of the mounting groove 202, and the clearance groove 203 is connected to the mounting groove 202, which is convenient for operators to take and put the stroke sensor, so that there is no need to use bolts and other components to clamp and fix the stroke sensor one by one, thereby improving the installation speed. When the travel sensor is placed in the installation groove 202 , the side of the travel sensor away from the pressure assembly 3 can abut against the inner wall of the installation groove 202 , and the sensing position of the travel sensor can protrude from the side wall of the fixture 201 from the through end of the installation groove 202 .

[0035] Reference Figure 1 and Figure 3 The pressure assembly 3 includes a pressure head 301 and a driving part 302 for driving the pressure head 301 to slide. After sliding, the pressure head 301 can abut against the end of the stroke sensor protruding from the fixture 201. After moving, the pressure head 301 can apply a certain pressure to the stroke sensor. The driving part 302 is arranged in the body 101. The driving part 302 includes a motor 303 fixedly arranged in the body 101 and an electric slide 304 fixed to the motor 303. The sliding direction of the electric slide 304 is parallel to the length direction of the stroke sensor.

[0036] Reference Figure 1 and Figure 3 The cover 102 is provided with a through slot 103, so that the operator can adjust or repair the driving part 302 without removing the cover 102, and the fixture 201 is fixed in the middle of the through slot 103. The outer wall of the through slot 103 near the motor 303 is detachably provided with a sealing plate 104 by bolts, which is used to shield the motor 303, and the sealing plate 104 can abut against the side wall of the fixture 201.

[0037] Reference Figure 1 and Figure 3, a sliding groove 105 is provided on the outer wall of the through groove 103 away from the motor 303. A connecting column 305 is fixedly provided on the sliding end of the electric slide 304, and the connecting column 305 passes through the through groove 103, and a sliding plate 306 is fixedly connected to the end of the connecting column 305 passing through the through groove 103, and the sliding plate 306 is slidingly connected in the sliding groove 105 along the length direction of the stroke sensor. When in an undetected state, the sliding plate 306 can abut against the inner wall of the sliding groove 105 away from the stroke sensor to achieve position limiting. The pressure head 301 is fixedly connected to the upper surface of the sliding plate 306, and when the motor 303 drives the sliding plate 306 to slide back and forth, it can drive the pressure head 301 to approach or move away from the stroke sensor.

[0038] Reference Figure 1 and Figure 2 , the detection component 4 includes a probe 401, a detection system 402 and a display 403. The probe 401 is fixedly arranged on the side wall of the pressure head 301 facing the stroke sensor, and when the pressure head 301 is pressed against the stroke sensor, the probe 401 can abut against the signal output area of ​​the stroke sensor to collect the output signal of the stroke sensor. The detection system 402 is fixedly arranged on the body 101, and the probe 401 is electrically connected to the detection system 402 through a wire to transmit the signal of the stroke sensor to the detection system 402, so that the detection system 402 can analyze and compare whether the output signal of the stroke sensor is normal. The display 403 is fixedly connected to the edge of the upper surface of the cover body 102, and the display 403 is also electrically connected to the detection system 402 through a wire, and the detection result of the detection system 402 is displayed through the display 403.

[0039] Reference Figure 1 and Figure 3 The detection assembly 4 also includes a plurality of signal lights 404 fixedly arranged on the edge of the upper surface of the cover 102. The signal lights 404 are all electrically connected to the detection system 402 through wires. The signal lights 404 are displayed in different colors to intuitively feedback the test results. In the embodiment of the present application, the signal lights 404 are set to two signal lights 404 of different colors, one for indicating that the detection is successful, and the other for indicating that the detection is not passed.

[0040] Reference Figure 1 and Figure 3 In order to facilitate the detection system 402 to obtain the pressure stroke of the pressure component 3, the motor 303 is electrically connected to the detection system 402. At the same time, a displacement sensor transmitting end 307 is fixedly provided on the motor 303, and a displacement sensor receiving end 308 is fixedly provided on the sliding plate 306. The displacement sensor transmitting end 307 is electrically connected to the detection system 402. Therefore, the detection system 402 can not only monitor and control the driving action of the motor 303, but also detect the sliding distance of the sliding plate 306, so as to control the pressure stroke of the pressure head 301 in a two-pronged manner.

[0041] The implementation principle of a sensor testing device in an embodiment of the present application is as follows: when performing a test, an operator can put a stroke sensor element into the mounting slot 202 of a fixture 201, and at this time, the sensing end of the stroke sensor protrudes from the fixture 201; the detection system 402 is started, and the electric slide 304 is driven to move a certain distance by controlling the motor 303, thereby driving the pressure head 301 on the sliding plate 306 to approach the stroke sensor until it abuts against the stroke sensor, so that the stroke sensor generates a certain stroke, and while generating the stroke, the output signal of the stroke sensor is detected by the probe 401 on the pressure head 301 and transmitted to the detection system 402 for analysis, and then the detection result is displayed through the display screen and the signal light 404; the test is repeated multiple times to detect whether the output signal data of different strokes on the same stroke sensor is normal; after the test is completed, the detection system 402 drives the electric slide 304 to move by controlling the motor 303 to drive the pressure head 301 to leave the stroke sensor, and at this time the operator can take out the stroke sensor that has been tested and replace it with a new stroke sensor for a new round of testing.

[0042] The above are preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. A sensor testing device, comprising a test bench (1), characterized in that: The test bench (1) is provided with a mounting assembly (2) for mounting a stroke sensor, a pressure assembly (3) for applying force to the stroke sensor, and a detection assembly (4) for detecting the output signal value of the stroke sensor. The pressure assembly (3) comprises a pressure head (301) and a driving unit (302) for driving the pressure head (301) to move back and forth. The moving direction of the pressure head (301) is parallel to the length direction of the stroke sensor, and the pressure head (301) can abut against the stroke sensor.

2. A sensor testing device according to claim 1, characterized in that: The mounting assembly (2) is configured as a fixture (201) fixedly mounted on the test bench (1); the fixture (201) is provided with a mounting groove (202) for plugging in a travel sensor; the length direction of the mounting groove (202) is parallel to the length direction of the travel sensor; and an end of the travel sensor away from the pressure-applying assembly (3) can abut against an inner wall of the mounting groove (202).

3. A sensor testing device according to claim 2, characterized in that: Two opposite inner walls of the installation groove (202) are each provided with a clearance groove (203), the clearance groove (203) is communicated with the installation groove (202), and the length of the clearance groove (203) is smaller than the length of the installation groove (202).

4. A sensor testing device according to claim 3, characterized in that: The detection assembly (4) comprises a probe (401) for collecting output signals of the stroke sensor, a detection system (402) for analyzing whether the output signals of the stroke sensor are normal, and a display (403) for displaying detection data, wherein the probe (401) and the display (403) are both electrically connected to the detection system (402); the probe (401) is fixedly arranged on the side wall of the pressure head (301) facing the stroke sensor, and the probe (401) is electrically connected to the detection system (402); and the probe (401) is connected to the signal output area of ​​the stroke sensor when the pressure head (301) is pressed against the stroke sensor.

5. A sensor testing device according to claim 4, characterized in that: The detection component (4) also includes a plurality of signal lights (404) capable of feeding back test results. The signal lights (404) are all electrically connected to the detection system (402), and the signal lights (404) are fixedly arranged on the edge of the upper surface of the test bench (1).

6. A sensor testing device according to claim 5, characterized in that: The driving unit (302) comprises a motor (303) fixed in the test bench (1) and an electric slide (304) fixed to the motor (303); the sliding direction of the electric slide (304) is parallel to the length direction of the stroke sensor; a sliding plate (306) is fixedly provided at the sliding end of the electric slide (304); the pressure head (301) is fixedly connected to the upper surface of the sliding plate (306); and the motor (303) is electrically connected to the detection system (402).

7. A sensor testing device according to claim 6, characterized in that: The upper surface of the test bench (1) is provided with a sliding groove (105), and the sliding plate (306) can be slidably connected in the sliding groove (105) along the length direction of the stroke sensor; when in a non-detection state, the sliding plate (306) abuts against the inner wall of the sliding groove (105) away from the stroke sensor.

8. A sensor testing device according to claim 7, characterized in that: A displacement sensor transmitting end (307) is fixedly arranged on the motor (303), a displacement sensor receiving end (308) is fixedly arranged on the sliding plate (306), and the displacement sensor transmitting end (307) is electrically connected to the detection system (402).

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