Testing device for testing distance measuring sensor

Abstract

The utility model discloses a testing device for testing a distance measuring sensor, and the testing device comprises a first testing plate and a second testing plate which are oppositely arranged; the adjusting assembly is connected between the first test board and the second test board, and the adjusting assembly is used for adjusting the distance between the first test board and the second test board; the distance measuring sensors are arranged on the side, facing the second test board, of the first test board, and each distance measuring sensor is used for detecting the distance from the second test board to the corresponding distance measuring sensor; and the test terminal is connected with each distance measuring sensor, and the test terminal is used for acquiring and outputting the detection distance of each distance measuring sensor. Through the testing device, the distance measuring performance of a plurality of distance measuring sensors can be synchronously tested, and the testing efficiency is improved.

Description

Technical Field

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

[0002] Before a ranging sensor (such as an ultrasonic radar) leaves the factory, relevant testers need to test the ranging performance of the ranging sensor.

[0003] In related technologies, obstacles at varying distances are typically placed in front of a single ranging sensor. The sensor's detected distance is then compared with the manually measured distance from the obstacle to the sensor to determine whether the sensor's ranging performance meets requirements. However, this testing method is inefficient when a large number of ranging sensors are used.

[0004] Therefore, how to improve the testing efficiency of ranging sensors has become a technical problem that needs to be solved urgently. Utility Model Content

[0005] The main technical problem solved by the present application is to provide a test device for testing a distance measuring sensor, which can synchronously test the distance measuring performance of multiple distance measuring sensors, thereby improving the test efficiency.

[0006] To solve the above technical problems, the present application provides a testing device for testing a distance measuring sensor, the testing device comprising: a first test board and a second test board, the first test board and the second test board being arranged relative to each other; an adjustment component connected between the first test board and the second test board, the adjustment component being used to adjust the distance between the first test board and the second test board; a plurality of distance measuring sensors, the plurality of distance measuring sensors being arranged on a side of the first test board facing the second test board, the respective distance measuring sensors being used to detect the distance from the second test board to the corresponding distance measuring sensor; and a test terminal connected to each distance measuring sensor, the test terminal being used to obtain and output the detection distance of each distance measuring sensor.

[0007] Optionally, the adjustment assembly includes at least one adjustment unit, the adjustment unit includes a plurality of adjustment rods connected in sequence along the length direction of the adjustment unit, one end of the adjustment unit is connected to the first test plate, the other end of the adjustment unit is connected to the second test plate, and any two adjacent adjustment rods in the adjustment unit are detachably connected.

[0008] Optionally, the adjustment unit includes a first adjustment rod and a second adjustment rod; one end of the first adjustment rod is connected to the first test plate, and the first adjustment rod has several first connection parts distributed at intervals in the length direction of the first adjustment rod; one end of the second adjustment rod is connected to the second test plate, and the second adjustment rod has several second connection parts distributed at intervals in the length direction of the second adjustment rod, and at least one first connection part of the first adjustment rod is respectively connected to a second connection part of the second adjustment rod.

[0009] Optionally, the first connection part and the second connection part are both through holes, and the adjustment unit further includes at least one fixing member, each fixing member is used to pass through a first connection part and a second connection part respectively to achieve connection between the first connection part and the second connection part.

[0010] Optionally, a scale is provided along the length direction of the adjustment unit.

[0011] Optionally, several ranging sensors are respectively arranged in different rows of the first test board, the distance between any two adjacent ranging sensors in the same row is greater than or equal to a first preset distance, the row spacing between different rows is greater than or equal to a second preset distance, and the ranging sensors in different rows are staggered.

[0012] Optionally, the distance between any two adjacent distance measuring sensors in the same row is equal to a first preset distance, the row spacing between different rows is equal to a second preset distance, and the first preset distance is equal to the second preset distance.

[0013] Optionally, the ranging sensor is an ultrasonic radar.

[0014] Optionally, the test terminal includes a controller and a host computer, each ranging sensor is connected to the controller, and the controller is communicatively connected to the host computer; the controller is used to obtain the detection data of each ranging sensor and output it to the host computer; the host computer is used to convert the detection data of each ranging sensor into the corresponding detection distance of each ranging sensor, and display the detection distance of each ranging sensor.

[0015] Optionally, the controller and the host computer are connected via a controller area network, and a photoelectric isolation module is connected to the communication line between the controller and the host computer.

[0016] The above scheme, the test device comprises a first test plate, a second test plate, a plurality of distance measuring sensors, an adjusting assembly and a test terminal. Since the first test plate and the second test plate are oppositely arranged, the adjusting assembly is connected between the first test plate and the second test plate, the plurality of distance measuring sensors are arranged on the side of the first test plate facing the second test plate, and the test terminal is connected with each distance measuring sensor, the distance between the first test plate and the second test plate can be adjusted by adjusting the adjusting assembly, so that the distance from the second test plate to each distance measuring sensor is adjusted, and then the distance measuring performance of the plurality of distance measuring sensors can be synchronously tested, and the test efficiency is improved. BRIEF DESCRIPTION OF DRAWINGS

[0017] Figure 1 is a structural schematic diagram of an embodiment of the test device provided by the present application;

[0018] Figure 2 is a distribution schematic diagram of the plurality of distance measuring sensors on the first test plate provided by the present application;

[0019] Figure 3 is a structural schematic diagram of the adjusting unit provided by the present application. DETAILED DESCRIPTION

[0020] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative labor fall within the scope of protection of the present application.

[0021] In addition, it should be noted that the term "a plurality of" herein represents two or more than two; the terms "first", "second", etc. are used to distinguish similar objects, and do not necessarily describe a specific order or sequence.

[0022] Please refer to Figure 1 , Figure 1 is a structural schematic diagram of an embodiment of the test device provided by the present application, which is used for synchronously testing the distance measuring performance of a plurality of distance measuring sensors 30. As Figure 1 shown, the test device comprises a first test plate 10, a second test plate 20, a plurality of distance measuring sensors 30, an adjusting assembly 40 and a test terminal 50.

[0023] The first test plate 10 and the second test plate 20 are oppositely arranged. The adjusting assembly 40 is connected between the first test plate 10 and the second test plate 20, and is used to adjust the distance between the first test plate 10 and the second test plate 20, that is, the length of the adjusting assembly 40 is adjustable. The distance measuring sensors 30 are arranged on the side of the first test plate 10 facing the second test plate 20, and each distance measuring sensor 30 is used to detect the distance from the second test plate 20 to the corresponding distance measuring sensor 30. The test terminal 50 is connected with each distance measuring sensor 30, and is used to acquire and output the detection distance of each distance measuring sensor 30.

[0024] The related test personnel can use the test device to synchronously perform multiple rounds of tests on the distance measuring sensors 30. In each round of test: the related test personnel can change the distance between the first test plate 10 and the second test plate 20 by adjusting the aforementioned adjusting assembly 40, thereby changing the distance from the second test plate 20 to each distance measuring sensor 30, and acquiring the detection distance of each distance measuring sensor 30 in this round of test through the test terminal 50; and for each distance measuring sensor 30, the related test personnel tests the actual distance from the second test plate 20 to the distance measuring sensor 30 in this round of test, and then compares the actual distance corresponding to the distance measuring sensor 30 with the detection distance, when the absolute value of the difference between the actual distance corresponding to the distance measuring sensor 30 and the detection distance is greater than or equal to a preset threshold value, it is determined that the distance measuring performance of the distance measuring sensor 30 in this round of test is abnormal, and when the absolute value of the difference between the actual distance corresponding to the distance measuring sensor 30 and the detection distance is less than the preset threshold value, it is determined that the distance measuring performance of the distance measuring sensor 30 in this round of test is normal.

[0025] In this embodiment, the test device includes a first test plate, a second test plate, a plurality of distance measuring sensors, an adjusting assembly and a test terminal. Since the first test plate and the second test plate are oppositely arranged, the adjusting assembly is connected between the first test plate and the second test plate, the distance measuring sensors are arranged on the side of the first test plate facing the second test plate, and the test terminal is connected with each distance measuring sensor, the distance between the first test plate and the second test plate can be adjusted by adjusting the adjusting assembly, thereby adjusting the distance from the second test plate to each distance measuring sensor, and the distance measuring performance of the distance measuring sensors can be synchronously tested, thereby improving the test efficiency.

[0026] In this embodiment, the first test board 10 is used to place a number of ranging sensors 30, and the second test board 20 is used as an obstacle board. The first test board 10 and the second test board 20 are arranged relative to each other, and the angle between the first test board 10 and the second test board 20 is a preset angle. The preset angle is greater than or equal to 0° and less than 90°. For example, the preset angle is 0°, 30°, or 45°, etc., as long as it does not affect the ranging performance test of each ranging sensor 30. To improve the convenience of testing, the preset angle can be set to 0°, that is, the first test board 10 and the second test board 20 are parallel and arranged relative to each other.

[0027] The first test plate 10 and the second test plate 20 can be circular plates, oval plates, triangular plates, square plates, rectangular plates, etc. Figure 1 In this example, the first test plate 10 and the second test plate 20 are both rectangular plates. The dimensions of the first test plate 10 and the second test plate 20 may be the same or different. The first test plate 10 and the second test plate 20 can be made of lightweight, low-cost, easily processable materials that do not interfere with the ranging performance of the ranging sensor 30, such as non-metallic materials. For example, the first test plate 10 and the second test plate 20 are both made of acrylic.

[0028] In this embodiment, the ranging sensor 30 can be an ultrasonic radar, a millimeter-wave radar, a laser radar, an infrared ranging sensor, etc. This embodiment does not specifically limit the type of ranging sensor 30. The following briefly describes the ranging principle of the ranging sensor 30, taking the ultrasonic radar as an example: the ultrasonic radar's transmitter emits ultrasonic waves, which are reflected when encountering an obstacle. The reflected waves are received by the ultrasonic radar's receiver and converted into electrical signals. By measuring the time and intensity of the reflected waves, the distance from the obstacle to the ultrasonic radar can be calculated. Specifically, the distance from the obstacle to the ultrasonic radar can be expressed by the following formula:

[0029]

[0030] Where d represents the distance from the obstacle to the ultrasonic radar; v represents the propagation speed of ultrasonic waves in the air, and v is a constant value of 340m / s; t represents the time difference from transmitting ultrasonic waves to receiving reflected waves (or echo signals).

[0031] In one embodiment, a plurality of distance measuring sensors 30 are fixedly arranged in different rows of the first test board 10. The distance between any two adjacent distance measuring sensors 30 in the same row is greater than or equal to a first preset distance, the distance between rows in different rows is greater than or equal to a second preset distance, and the distance measuring sensors 30 in different rows are staggered. In a specific application, the distance between any two adjacent distance measuring sensors 30 in the same row is equal to the first preset distance, the distance between rows in different rows is equal to the second preset distance, and the first preset distance and the second preset distance are equal. For example, the first preset distance and the second preset distance are both 15 cm. The first preset distance and the second preset distance can be set based on the test to maximize the spacing between the distance measuring sensors 30 on the limited test board, reduce interference between the distance measuring sensors 30 during operation, and thus improve the accuracy of the test results.

[0032] Figure 2 Schematic diagram of the distribution of several distance measuring sensors 30 provided in this application on the first test board 10. Figure 2 In the figure, the number of ranging sensors 30 is 12, and all of them are ultrasonic radars. The 12 ultrasonic radars are located in three rows of the first test board 10, and each row includes 4 ultrasonic radars. The distance between any two adjacent ultrasonic radars in the same row of three rows is 15 cm, and the row spacing between different rows is 15 cm. The ultrasonic radars in the first row are staggered with the ultrasonic radars in the second row, and the ultrasonic radars in the second row are staggered with the ultrasonic radars in the third row. For example, take the midpoint of two adjacent ultrasonic radars in the first row, and stagger the ultrasonic radars in the second row at 15 cm from the midpoint to form a Figure 2 The triangle shown has three sides of 7.5 cm, 15 cm and 16.76 cm respectively.

[0033] In this embodiment, the length of the adjustment component 40 is adjustable, and by adjusting the length of the adjustment component 40, the distance between the first test board 10 and the second test board 20 can be adjusted. For example, the adjustment component 40 can be made of acrylic material.

[0034] Please refer again Figure 1, the adjustment assembly 40 includes at least one adjustment unit 41, one end of the adjustment unit 41 is connected to the first test board 10, and the other end of the adjustment unit 41 is connected to the second test board 20. For example, the adjustment assembly 40 includes only one adjustment unit 41, one end of the adjustment unit 41 is connected to the center position of the first test board 10, and the other end is connected to the center position of the second test board 20. For another example, the first test board 10 and the second test board 20 are both rectangular plates, and the adjustment assembly 40 includes four adjustment units 41, each adjustment unit 41 is respectively connected to a corner of the first test board 10 and a corner of the second test board 20. It should be noted that, Figure 1 In the figure, the adjustment component 40 is only illustrated as including four adjustment units 41 .

[0035] In one embodiment, at least one first connection slot is defined inwardly on the side of the first test board 10 facing the second test board 20, and at least one second connection slot is defined inwardly on the side of the second test board 20 facing the first test board 10, with each first connection slot being opposed by a second connection slot. For each adjustment unit 41, one end of the adjustment unit 41 is inserted into a first connection slot to connect to the first test board 10, and the other end of the adjustment unit 41 is inserted into a second connection slot to connect to the second test board 20.

[0036] In another embodiment, the first test board 10 is provided with at least one first connection protrusion on the side facing the second test board 20. Each first connection protrusion has a third connection groove defined inwardly on the side facing away from the first test board 10. The second test board 20 is provided with at least one second connection protrusion on the side facing the first test board 10. Each second connection protrusion has a corresponding fourth connection groove defined inwardly on the side facing away from the second test board 20. Each third connection groove has a fourth connection groove located opposite it. For each adjustment unit 41, one end of the adjustment unit 41 is inserted into the third connection groove to connect to the first test board 10, and the other end of the adjustment unit 41 is inserted into the fourth connection groove to connect to the second test board 20.

[0037] It should be noted that the above two embodiments are merely exemplary. In other embodiments, the first test board 10 may have at least one connecting groove defined inwardly on the side facing the second test board 20, the second test board 20 may have at least one connecting protrusion defined inwardly on the side facing the first test board 10, and each connecting protrusion may have a connecting groove defined inwardly on the side facing away from the second test board 20. One end of the adjustment unit 41 may be inserted into a connecting groove to connect with the first test board 10, and the other end of the adjustment unit 41 may be inserted into a connecting protrusion to connect with the second test board 20. Alternatively, the second test board 20 may have at least one connecting groove defined inwardly on the side facing the first test board 10, the first test board 10 may have at least one connecting protrusion defined inwardly on the side facing the second test board 20, and each connecting protrusion may have a connecting groove defined inwardly on the side facing away from the first test board 10. One end of the adjustment unit 41 may be inserted into a connecting protrusion to connect with the first test board 10, and the other end of the adjustment unit 41 may be inserted into a connecting groove to connect with the second test board 20. Alternatively, the connection between the adjustment unit 41 and the first test board 10 and the second test board 20 may be achieved through other methods, which are not listed here one by one.

[0038] Furthermore, for each adjustment unit 41, the adjustment unit 41 includes a plurality of adjustment rods ( Figure 1 (The specific structure of the adjustment unit 41 is not shown in the figure), and any two adjacent adjustment rods in the adjustment unit 41 are detachably connected. The number of adjustment rods in the adjustment unit 41 can be two or more. For example, the adjustment rods of the adjustment unit 41 are the same length, and the adjustment rods of different adjustment units 41 are also the same length.

[0039] In one embodiment, the multiple adjustment rods of the adjustment unit 41 are detachably connected end to end. The distance between the first test plate 10 and the second test plate 20 can be adjusted by removing or increasing the number of adjustment rods in each adjustment unit 41 .

[0040] For example, assume that five rounds of testing are required for a number of ranging sensors 30: in the first round of testing, each adjustment unit 41 includes five adjustment rods that are detachably connected in sequence along its length direction; in the second round of testing, one adjustment rod of each adjustment unit 41 is removed, so that each adjustment unit 41 has four adjustment rods that are detachably connected in sequence along its length direction; and so on, until in the fifth round of testing, each adjustment unit 41 has only one adjustment rod left.

[0041] In another embodiment, each adjustment unit 41 includes two adjustment rods, and the distance between the first test plate 10 and the second test plate 20 can be adjusted by adjusting the connection between the two adjustment rods.

[0042] Figure 3 Schematic diagram of the structure of the adjustment unit 41 provided by this application. Figure 3 As shown, the adjustment unit 41 includes a first adjustment rod 411 and a second adjustment rod 412. One end of the first adjustment rod 411 is connected to the first test plate 10 ( Figure 3 The first test plate 10 is not shown in the figure. The first adjustment rod 411 has a plurality of first connection portions 41a spaced apart in the length direction of the first adjustment rod 411. One end of the second adjustment rod 412 is connected to the second test plate 20 ( Figure 3 The second test plate 20 is not shown in the figure, and the second adjustment rod 412 has a plurality of second connection portions 41b spaced apart along the length of the second adjustment rod 412. At least one first connection portion 41a of the first adjustment rod 411 is connected to one second connection portion 41b of the second adjustment rod 412.

[0043] In one example, the first adjustment rod 411 has a plurality of first connection portions 41a spaced apart throughout the rod, while the second adjustment rod 412 has a plurality of second connection portions 41b (such as two second connection portions 41b) spaced apart only at one end away from the second test plate 20, and each second connection portion 41b is connected to one first connection portion 41a.

[0044] In another example, the first adjustment rod 411 has a plurality of first connection portions 41a (e.g., two first connection portions 41a) spaced apart only at one end away from the first test plate 10, while the second adjustment rod 412 has a plurality of second connection portions 41b spaced apart throughout the rod, and each first connection portion 41a is connected to one second connection portion 41b.

[0045] It should be noted that the above two examples are merely illustrative. In other examples, the first adjustment rod 411 may have a plurality of first connecting portions 41a spaced apart throughout the rod, and the second adjustment rod 412 may also have a plurality of second connecting portions 41b spaced apart throughout the rod. For example, the plurality of first connecting portions 41a are spaced apart by a third preset distance, and the plurality of second connecting portions 41b are also spaced apart by a third preset distance. The third preset distance can be set based on actual distance testing requirements, for example, 1 cm or 2 cm.

[0046] In one example, if Figure 3 As shown, the first connecting portion 41a and the second connecting portion 41b are both through holes, and the adjustment unit 41 further includes at least one fixing member ( Figure 3 The fixing member is not shown in the figure), and the fixing member is used to pass through a first connecting portion 41a and a second connecting portion 41b to achieve the connection between the first connecting portion 41a and the second connecting portion 41b. Exemplarily, the fixing member is a bolt, a latch, etc.

[0047] In another example, one of the first connection portion 41a and the second connection portion 41b is a snap-fit ​​block, and the other of the first connection portion 41a and the second connection portion 41b is a snap-fit ​​socket, and the snap-fit ​​block is snap-fitted to the corresponding snap-fit ​​socket.

[0048] Furthermore, the first test plate 10 and the second test plate 20 are arranged parallel to and opposite to each other, and a scale is provided in the length direction of at least one adjustment unit 41 of the adjustment assembly 40 .

[0049] In one embodiment, the length direction of the first adjustment rod 411 and the length direction of the second adjustment rod 412 of the adjustment unit 41 are both provided with scales ( Figure 3 The scale range set on the first adjustment rod 411 is greater than or equal to the first scale value and less than or equal to the second scale value, and the scale values ​​set on the first adjustment rod 411 gradually increase in the direction away from the first test plate 10; the scale range set on the second adjustment rod 412 is greater than or equal to the third scale value and less than or equal to the fourth scale value, and the scale values ​​set on the second adjustment rod 412 gradually increase in the direction away from the second test plate 20. By way of example, the first scale value and the third scale value are both 0 cm, and the second scale value and the fourth scale value are set according to actual needs. In each round of testing, relevant testers can read the first target scale value on the first adjustment rod 411 and the second target scale value on the second adjustment rod 412, respectively, and add the first target scale value and the second target scale value to obtain the distance from the second test plate 20 to each ranging sensor 30.

[0050] Optionally, in other embodiments, the length of the first adjustment rod 411 is a known value, and a scale may be set only on the second adjustment rod 412 of the adjustment unit 41. In this way, the relevant tester only needs to read the scale value corresponding to the second adjustment rod 412 to obtain the distance from the second test plate 20 to each ranging sensor 30.

[0051] By providing a scale along the length of the adjustment unit 41, it is convenient for testers to intuitively read the distance between the second test plate 20 and each ranging sensor 30. Furthermore, there is no need to manually measure the distance between the second test plate 20 and each ranging sensor 30 during each test, further improving test efficiency and accuracy.

[0052] In this embodiment, the test terminal 50 can display the detection distance of each ranging sensor 30 on the display screen of the test terminal 50, so that the relevant test personnel can intuitively obtain the detection distance of each test sensor. Alternatively, the test terminal 50 can further be connected to the terminal device of the relevant test personnel, and the test terminal 50 can send the detection distance of each ranging sensor 30 to the terminal device of the relevant test personnel, so that the relevant test personnel can directly obtain the detection distance of each test sensor through the terminal device. For example, the terminal device of the relevant test personnel can be the relevant test personnel's mobile phone, laptop computer, tablet computer, etc.

[0053] Please refer again Figure 1 The test terminal 50 includes a controller 51 (or host) and a host computer 53. Each distance measuring sensor 30 is connected to the controller 51, and the controller 51 is in communication with the host computer 53. The controller 51 is used to obtain detection data from each distance measuring sensor 30 and output it to the host computer 53. The host computer 53 is used to convert the detection data of each distance measuring sensor 30 into the corresponding detection distance of each distance measuring sensor 30 and display the detection distance of each distance measuring sensor 30.

[0054] For example, the detection distance of each distance measuring sensor 30 is quantitative data in millimeters.

[0055] Exemplarily, each ranging sensor 30 is an ultrasonic radar, and each ultrasonic radar exchanges data with the controller 51 through a USS (Ultrasonic Sensor System) communication protocol.

[0056] Exemplarily, the controller 51 is connected to the host computer 53 via the controller 51 local area network (CAN network). Furthermore, in this example, a photoelectric isolation module 52 is connected to the communication line between the controller 51 and the host computer 53. The photoelectric isolation module 52 includes a first photoelectric isolator 52a and a second photoelectric isolator 52b, which are used in conjunction with each other. The photoelectric isolation module 52 is used to protect the communication line between the controller 51 and the host computer 53 from interference, improve the accuracy of the detection data transmission of each ranging sensor 30, and thus further improve the accuracy and reliability of the test results.

[0057] In real-world scenarios, a vehicle is typically equipped with multiple ultrasonic radars, and in many cases, these radars need to operate simultaneously. The test device described in this application allows for simultaneous ranging performance testing of multiple ultrasonic radars on a vehicle. Furthermore, the test device can be placed in different electromagnetic interference environments for testing, assessing the anti-interference capabilities of multiple ultrasonic radars on a vehicle in these environments and improving test efficiency and accuracy.

[0058] The above merely provides the implementation of the present application, and does not limit the patent scope of the present application. Any equivalent structure or equivalent process transformation based on the content of the present application specification and drawings, or direct or indirect application in other related technical fields, are also included in the patent protection scope of the present application.

Claims

1. A testing device for testing a distance measuring sensor, characterized in that: The testing device comprises: a first test plate and a second test plate, wherein the first test plate and the second test plate are arranged opposite to each other; an adjustment component connected between the first test plate and the second test plate, and configured to adjust a distance between the first test plate and the second test plate; a plurality of distance measuring sensors, each of which is arranged on a side of the first test board facing the second test board, and each of which is used to detect the distance from the second test board to the corresponding distance measuring sensor; A test terminal is connected to each of the distance measuring sensors, and is used to obtain and output the detection distance of each of the distance measuring sensors.

2. The testing device according to claim 1, wherein: The adjustment assembly includes at least one adjustment unit, which includes a plurality of adjustment rods connected in sequence along the length direction of the adjustment unit, one end of the adjustment unit is connected to the first test plate, and the other end of the adjustment unit is connected to the second test plate, and any two adjacent adjustment rods in the adjustment unit are detachably connected.

3. The testing device according to claim 2, characterized in that The adjustment unit includes a first adjustment rod and a second adjustment rod; One end of the first adjustment rod is connected to the first test plate, and the first adjustment rod has a plurality of first connection parts distributed at intervals in the length direction of the first adjustment rod. One end of the second adjustment rod is connected to the second test plate, and the second adjustment rod has a plurality of second connection parts distributed at intervals in the length direction of the second adjustment rod, and at least one first connection part of the first adjustment rod is respectively connected to one second connection part of the second adjustment rod.

4. The testing device according to claim 3, characterized in that: The first connection part and the second connection part are both through holes, and the adjustment unit further includes at least one fixing member, each of which is used to pass through one of the first connection parts and one of the second connection parts to achieve connection between the first connection part and the second connection part.

5. The testing device according to claim 2, characterized in that: The adjustment unit is provided with a scale in the length direction.

6. The testing device according to claim 1, wherein: The plurality of ranging sensors are respectively arranged in different rows of the first test board, the distance between any two adjacent ranging sensors in the same row is greater than or equal to a first preset distance, the row spacing between different rows is greater than or equal to a second preset distance, and the ranging sensors in different rows are staggered.

7. The testing device according to claim 6, characterized in that The distance between any two adjacent distance measuring sensors in the same row is equal to the first preset distance, the row spacing between different rows is equal to the second preset distance, and the first preset distance is equal to the second preset distance.

8. The testing device according to claim 1, wherein: The distance measuring sensor is an ultrasonic radar.

9. The testing device according to claim 1, wherein: The test terminal includes a controller and a host computer, each of the distance measuring sensors is connected to the controller, and the controller is in communication with the host computer; the controller is used to obtain detection data of each of the distance measuring sensors and output it to the host computer; the host computer is used to convert the detection data of each of the distance measuring sensors into the corresponding detection distance of each of the distance measuring sensors, and display the detection distance of each of the distance measuring sensors.

10. The testing device according to claim 9, characterized in that: The controller is connected to the host computer via a controller area network, and a photoelectric isolation module is connected to the communication line between the controller and the host computer.

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