Test tool

Abstract

The utility model provides a test tool which is used for testing the performance of a laser radar. The testing tool comprises a shell, a first temperature adjusting plate and a second temperature adjusting plate. The first temperature adjusting plate is arranged in the shell. The second temperature adjusting plate is arranged in the shell. At least one of the first temperature control plate or the second temperature control plate is configured to be movable within the housing. The first temperature adjusting plate and the second temperature adjusting plate are arranged in a spaced mode, a containing space is formed between the first temperature adjusting plate and the second temperature adjusting plate, the size of the containing space is larger than the size of a shell of the laser radar, and the containing space is used for containing the laser radar. The first temperature adjustment plate and the second temperature adjustment plate are configured to change the ambient temperature of the lidar. The embodiment of the utility model is beneficial to improving the accurate control degree of the environment temperature of the laser radar, is suitable for laser radars of different specifications and sizes, improves the consistency of multiple tests, and improves the performance test efficiency of the laser radar.

Description

Technical Field

[0001] This disclosure relates to the field of lidar testing technology, and in particular to a testing fixture. Background Technology

[0002] LiDAR boasts high detection accuracy and is minimally affected by weather and ambient light, enabling all-weather, all-time high-precision detection. It has wide applications in various fields such as autonomous driving, field surveying, and drone detection. However, in some application scenarios, LiDAR operates in harsh environments. Ambient temperature affects the performance of LiDAR components and the deformation of mechanical parts, thus impacting detection accuracy. Therefore, it is necessary to test the performance of LiDAR under different temperatures.

[0003] The performance of lidar at different temperatures can be tested by providing a test temperature in a closed space. However, existing testing equipment suffers from low testing efficiency and poor consistency across multiple tests. Utility Model Content

[0004] To address one or more deficiencies in the prior art, this disclosure provides a test fixture for performance testing of a lidar. The test fixture includes a housing, a first temperature-regulating plate, and a second temperature-regulating plate, wherein the first temperature-regulating plate is disposed within the housing; the second temperature-regulating plate is disposed within the housing, and at least one of the first or second temperature-regulating plate is configured to be movable within the housing; the first and second temperature-regulating plates are spaced apart, and an accommodating space is provided between them, the size of which is larger than the size of the lidar housing, and the accommodating space is used to house the lidar; the first and second temperature-regulating plates are configured to change the ambient temperature of the lidar.

[0005] Optionally, the test fixture also includes a blower configured to spray air toward the window of the lidar.

[0006] Optionally, the blowing device includes a blowing tube configured to be flexible such that at least one of the air jet direction or air jet position of the blowing tube corresponds to the viewing window.

[0007] Optionally, the test fixture further includes a partition, at least a portion of which is located between the first temperature-regulating plate and the second temperature-regulating plate.

[0008] Optionally, the partition includes a fixing plate and an adjusting plate, wherein the fixing plate is attached to the first temperature regulating plate and has a notch; the adjusting plate is movably disposed at the notch position and covers the notch.

[0009] Optionally, the second temperature regulating plate and the fixing plate are engaged at the notch position.

[0010] Optionally, the housing includes a viewing window configured to allow the detection light and echo of the lidar to pass through.

[0011] Optionally, the outer casing further includes an insulation board, which is connected to the viewing window, or the viewing window is embedded in the insulation board to form a cavity, in which the lidar is located.

[0012] Optionally, the insulation board includes an outer panel and an inner panel, the outer panel and the inner panel are spaced apart and form a hollow structure, the hollow structure being filled with insulation material.

[0013] Optionally, the test fixture further includes an adapter, which is detachably disposed on the side of the first temperature regulating plate facing the second temperature regulating plate, for mounting a lidar.

[0014] Optionally, the test fixture includes multiple adapters for matching different lidars.

[0015] Optionally, the test fixture further includes a pad, which is disposed on the side of the first temperature regulating plate away from the second temperature regulating plate and is configured to adjust the height of the first temperature regulating plate.

[0016] Compared with existing technologies, the embodiments of this disclosure provide a testing fixture. A receiving space is provided between the first and second temperature-regulating plates for placing a lidar. The first and second temperature-regulating plates can change the ambient temperature of the lidar, allowing for efficient adjustment of the lidar's ambient temperature. At least one of the first or second temperature-regulating plates is movable within the housing. By changing the position of the first or second temperature-regulating plate, the size of the receiving space can be adjusted, which helps improve the accuracy of controlling the lidar's ambient temperature. This fixture is suitable for lidars of different sizes and specifications, improving the consistency of multiple tests. Furthermore, adjusting the size of the receiving space also helps to increase the rate of change of the lidar's ambient temperature, improving the efficiency of performance testing of the lidar. Attached Figure Description

[0017] The accompanying drawings are provided to further illustrate the present disclosure and form part of the specification. They are used together with the embodiments of the present disclosure to explain the disclosure and do not constitute a limitation thereof. In the drawings:

[0018] Figure 1 A schematic diagram of the structure of an exemplary test fixture consistent with some embodiments of this disclosure is shown;

[0019] Figure 2A schematic diagram of an exemplary first temperature control plate, a second temperature control plate, and a lidar consistent with some embodiments of this disclosure is shown;

[0020] Figure 3 A schematic diagram of an exemplary first temperature regulating plate, a second temperature regulating plate, and a partition plate consistent with some embodiments of this disclosure is shown;

[0021] Figure 4 A schematic diagram illustrating the engagement of an exemplary fixing plate and an adjusting plate consistent with some embodiments of this disclosure is shown;

[0022] Figure 5 A cross-sectional view of the housing in an exemplary test fixture consistent with some embodiments of this disclosure is shown. Detailed Implementation

[0023] In the following description, only certain exemplary embodiments are shown. As those skilled in the art will recognize, the described embodiments can be modified in various ways without departing from the spirit or scope of this disclosure. Therefore, the drawings and description are to be considered exemplary in nature and not restrictive.

[0024] In the description of this disclosure, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," and "counterclockwise," etc., indicating orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, are used only for the convenience of describing this disclosure and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this disclosure. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the stated features. In the description of this disclosure, "a plurality of" means two or more, unless otherwise explicitly and specifically defined.

[0025] In the description of this disclosure, it should be noted that, unless otherwise expressly specified and limited, the terms "installation," "connection," and "joint" should be interpreted broadly. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to mechanical connections, electrical connections, or connections that allow for communication; they can refer to direct connections or indirect connections through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this disclosure according to the specific circumstances.

[0026] In this disclosure, unless otherwise expressly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0027] The following disclosure provides numerous different embodiments or examples for implementing various structures of this disclosure. To simplify the disclosure, specific examples of components and arrangements are described below. These are merely examples and are not intended to limit the scope of this disclosure. Furthermore, reference numerals and / or letters may be repeated in different examples; such repetition is for simplification and clarity and does not in itself indicate a relationship between the various embodiments and / or arrangements discussed. In addition, various specific examples of processes and materials are provided in this disclosure, but those skilled in the art will recognize the application of other processes and / or the use of other materials.

[0028] The embodiments of this disclosure are described below with reference to the accompanying drawings. It should be understood that the embodiments described herein are for illustration and explanation only and are not intended to limit this disclosure.

[0029] To facilitate understanding of the technical solutions of the embodiments of this disclosure, the related technologies of the embodiments of this disclosure are described below. The following related technologies are optional solutions and can be combined with the technical solutions of the embodiments of this disclosure in any way, and all of them fall within the protection scope of the embodiments of this disclosure.

[0030] This disclosure relates to a testing fixture for performance testing of a lidar. In some embodiments, the testing fixture may include a housing, a first temperature regulating plate, and a second temperature regulating plate. The first temperature regulating plate is disposed within the housing, and the second temperature regulating plate is disposed within the housing. The first and second temperature regulating plates are spaced apart, and an accommodating space is provided between them. The size of the accommodating space is larger than the size of the lidar housing, and the accommodating space is used to house the lidar.

[0031] In some embodiments, at least one of the first or second temperature-regulating plates is movable. For example, the first temperature-regulating plate can move away from or towards the second temperature-regulating plate. Similarly, the second temperature-regulating plate can move away from or towards the first temperature-regulating plate. Furthermore, the first and second temperature-regulating plates can be moved away from or towards each other. By changing the position of at least one of the first or second temperature-regulating plates, the size of the accommodating space can be changed, making the testing fixture suitable for lidars of different sizes and specifications, thus improving the applicability of the testing fixture.

[0032] In some embodiments, the first and second temperature-regulating plates can alter the ambient temperature of the lidar. For example, the first and second temperature-regulating plates can serve as heat (or cold) sources for the testing fixture. The positions of the first and second temperature-regulating plates relative to the lidar affect the efficiency of testing the lidar's performance and the consistency of multiple tests. By adjusting the position of at least one of the first or second temperature-regulating plates, not only can the first and second temperature-regulating plates be brought closer to the lidar's housing, improving testing efficiency, but also, in multiple tests, for the same or different lidars, controlling the distance between the first and second temperature-regulating plates and the lidar's housing can improve the consistency of multiple test results.

[0033] Figure 1 A schematic diagram of an exemplary test fixture 100 consistent with some embodiments of this disclosure is shown. The test fixture 100 in this embodiment is used to test the performance of a lidar 200.

[0034] refer to Figure 1The testing fixture 100 includes a housing 102, a first temperature regulating plate 104, and a second temperature regulating plate 106. The first temperature regulating plate 104 and the second temperature regulating plate 106 are disposed within the housing 102. At least one of the first temperature regulating plate 104 or the second temperature regulating plate 106 can move within the housing 102. For example, the position of the first temperature regulating plate 104 within the housing 102 may be relatively fixed, while the second temperature regulating plate 106 may move closer to or further away from the first temperature regulating plate 104. Alternatively, the position of the second temperature regulating plate 106 within the housing 102 may be relatively fixed, while the first temperature regulating plate 104 may move closer to or further away from the second temperature regulating plate 106. Or, the positions of both the first temperature regulating plate 104 and the second temperature regulating plate 106 within the housing 102 may be adjustable, allowing them to move closer to or further away from each other. In some embodiments, the tilt angle of at least one of the first temperature regulating plate 104 or the second temperature regulating plate 106 can be changed. For example, the pitch angle and roll angle of at least one of the first temperature regulating plate 104 or the second temperature regulating plate 106 can be changed. In some embodiments, the position of the first temperature regulating plate 104 or the second temperature regulating plate 106 within the housing 102 can be manually adjusted by an operator. Alternatively, the test fixture 100 includes a power source that automatically adjusts the position of the first temperature regulating plate 104 or the second temperature regulating plate 106 within the housing 102.

[0035] In some embodiments, the first temperature regulating plate 104 and the second temperature regulating plate 106 can change the ambient temperature of the lidar 200. For example, the first temperature regulating plate 104 and the second temperature regulating plate 106 may include heating wires, utilizing the Joule heat generated by the heating wires when energized to change the ambient temperature of the lidar 200. Alternatively, in some embodiments, the first temperature regulating plate 104 and the second temperature regulating plate 106 may include pipes, allowing a temperature regulating medium to be pumped into the first temperature regulating plate 104 and the second temperature regulating plate 106 via a heat pump or a cold pump to change the ambient temperature of the lidar 200.

[0036] In some embodiments, the ambient temperature of the lidar 200 is changed by the first temperature regulating plate 104 and the second temperature regulating plate 106, so that the lidar 200 operates at a set test temperature. Based on the detection results of the lidar 200, the operating performance of the lidar 200 at the test temperature can be tested.

[0037] Figure 2 A schematic diagram illustrating the positional relationship of an exemplary first temperature-regulating plate, a second temperature-regulating plate, and a lidar, consistent with some embodiments of this disclosure, is shown. Figure 2 As shown, the first temperature regulating plate 204 and the second temperature regulating plate 206 are spaced apart, and there is an accommodating space 208 between the first temperature regulating plate 204 and the second temperature regulating plate 206. The size of the accommodating space 208 is larger than the size of the housing of the lidar 200, and the accommodating space 208 is used to house the lidar 200. Figure 2The first temperature control plate 204 shown in the figure may be similar to or the same as the first temperature control plate 104 in the foregoing embodiment; Figure 2 The second temperature regulating plate 206 shown may be similar to or the same as the second temperature regulating plate 106 in the foregoing embodiments.

[0038] refer to Figure 2 For example, in some embodiments, the first temperature-regulating plate 204 and the second temperature-regulating plate 206 are arranged substantially parallel to each other, and the lidar 200 is placed between the first temperature-regulating plate 204 and the second temperature-regulating plate 206. Optionally, the first temperature-regulating plate 204 and the second temperature-regulating plate 206 may be close to the lower surface and the upper surface of the lidar 200, respectively. Optionally, the first temperature-regulating plate 204 and the second temperature-regulating plate 206 may be close to two sides of the lidar 200, respectively. In some embodiments, the lidar 200 may be placed horizontally within the accommodating space 208. In some embodiments, the lidar 200 may also be placed in other orientations within the accommodating space 208. For example, the bottom surface of the lidar 200 may form a certain angle with the horizontal surface. The first temperature-regulating plate 204 may be parallel to and close to the lower surface of the lidar 200. The second temperature-regulating plate 206 may be parallel to and close to the upper surface of the lidar 200.

[0039] In some embodiments, by adjusting the position of the first temperature regulating plate 204 or the second temperature regulating plate 206 in the housing, the size of the accommodating space 208, as well as the distance and / or angle of the first temperature regulating plate 204 and the second temperature regulating plate 206 relative to the lidar 200, can be changed, which is beneficial to improving the applicability of the test fixture.

[0040] The first temperature regulating plate 204 and the second temperature regulating plate 206 serve as heat or cold sources for the ambient temperature. By changing the distance and / or angle of the first temperature regulating plate 204 and the second temperature regulating plate 206 relative to the lidar 200, the time it takes for the ambient temperature of the lidar 200 to reach the set test temperature can be shortened, thus improving test efficiency. When performing multiple performance tests on the lidar 200 using the test fixture, the distance between the first temperature regulating plate 204 and the second temperature regulating plate 206 and the lidar 200 can be kept stable. When performing multiple performance tests on lidars 200 of different sizes and specifications using the test fixture, maintaining approximately equal distances between the first temperature regulating plate 204 and the second temperature regulating plate 206 and the lidar 200 helps improve the consistency of the test fixture across multiple tests.

[0041] See Figure 2In some embodiments, the test fixture also includes a blower 210. The blower 210 can spray air towards the viewing window 202 of the lidar 200. When testing the performance of the lidar 200 using the test fixture, moisture in the environment may condense on the surface of the viewing window 202 of the lidar 200 due to changes in ambient temperature. For example, when testing the operating performance of the lidar 200 in a low-temperature environment, moisture in the air condenses into water droplets or frost on the surface of the viewing window 202, affecting the detection performance of the lidar 200 and interfering with the performance test results. By using the blower 210 to spray air towards the viewing window 202, a high-speed airflow can be used to defrost and defog the viewing window 202, reducing the impact of ambient moisture on the lidar 200 and improving the accuracy of the test.

[0042] In some embodiments, the blowing device 210 includes a blowing pipe 212. For example, one end of the blowing pipe 212 is connected to an air pump, and the other end of the blowing pipe 212 is open, allowing airflow to be ejected outwards. In some embodiments, the blowing pipe 212 can be bent so that at least one of the jet direction or jet position of the blowing pipe 212 corresponds to the position of the viewing window 202. Optionally, the bending of the blowing pipe 212 can be performed manually by an operator or automatically. When the test fixture is used to perform performance tests on lidars 200 of different specifications, the positions of the viewing window 202 are inconsistent. By adjusting at least one of the jet direction or jet position of the blowing pipe 212, the airflow ejected from the blowing pipe 212 can more efficiently and accurately defrost and defog the viewing window 202. When adjusting at least one of the jet direction or jet position of the blowing pipe 212, the blowing pipe 212 can be adjusted so that the ejected airflow covers the area of ​​the viewing window 202 as much as possible, reducing the risk of partial obstruction of the viewing window 202.

[0043] In some embodiments, the blower 212 may include a metal-shaped flexible tube. The metal-shaped flexible tube can be bent according to the position of the viewing window 202 of the lidar 200 to adjust at least one of the jet direction or jet position. After bending, the metal-shaped flexible tube can remain in the bent position and remain approximately stable during jetting towards the viewing window 202, eliminating the need for fixing or repeatedly adjusting the blower 212. This reduces the structural complexity of the testing fixture and simplifies the testing process.

[0044] Figure 3 A schematic diagram of the structure of a first temperature regulating plate, a second temperature regulating plate, and a partition in an exemplary test fixture consistent with some embodiments of the present disclosure is shown.

[0045] See Figure 3In some embodiments, the test fixture may further include a partition 314. At least a portion of the partition 314 is located between the first temperature regulating plate 304 and the second temperature regulating plate 306. Figure 3 The first temperature regulating plate 304 shown may be similar to or the same as the first temperature regulating plate 104 or the first temperature regulating plate 204 in the foregoing embodiments; Figure 3 The second temperature regulating plate 306 shown may be similar to or the same as the second temperature regulating plate 106 or the second temperature regulating plate 206 in the foregoing embodiments; Figure 3 The accommodating space 308 shown may be similar to or the same as the accommodating space 208 in the foregoing embodiments; Figure 3 The blower 310 shown may be similar to or the same as the blower 210 in the foregoing embodiments.

[0046] For example, the partition 314 intersects with the first temperature regulating plate 304 and the second temperature regulating plate 306, and at least partially surrounds the circumference of the accommodating space 308. Optionally, a portion of the partition 314 may extend to the side of the first temperature regulating plate 304 and / or the second temperature regulating plate 306 away from the accommodating space 308. For example, the lower portion of the partition 314 may extend to the lower side of the first temperature regulating plate 304, and / or the upper portion of the partition 314 may extend to the upper side of the second temperature regulating plate 304. The partition 314, the first temperature regulating plate 304, and the second temperature regulating plate 306 may form a semi-enclosed accommodating space 308. This helps to reduce the influence of the external environment of the accommodating space 308 on the ambient temperature of the lidar, and improves the accuracy of performance testing of the lidar.

[0047] In some embodiments, the partition 314, the first temperature-regulating plate 304, and the second temperature-regulating plate 306 surround the circumference of the accommodating space 308, and the lidar can be placed in the accommodating space 308. The partition 314 is not provided on the side facing the lidar's viewing window, or a light-transmitting structure is provided at the position corresponding to the viewing window. The first temperature-regulating plate 304 and the second temperature-regulating plate 306 are used to change the temperature of the accommodating space 308, providing a testing environment for the lidar. The partition 314 helps reduce the influence of the external environment of the accommodating space 308 on the lidar and also helps improve the efficiency of the first temperature-regulating plate 304 and the second temperature-regulating plate 306 in changing the temperature of the accommodating space 308.

[0048] In some embodiments, a blower 310 can be used to spray air into the viewing window of the lidar. A partition 314 on the side of the accommodating space 308 can restrict the flow direction of the airflow from the blower 310, which helps reduce the impact of the high-speed airflow on the temperature inside the accommodating space 308, maintains the temperature inside the accommodating space 308, improves temperature regulation efficiency, and prevents the high-speed airflow from carrying away too much heat, or from causing the high-speed airflow temperature to be higher than the test environment temperature, resulting in a slow temperature drop inside the accommodating space 308.

[0049] In some embodiments, the partition 314 may be attached to the surfaces of the first temperature regulating plate 304 and the second temperature regulating plate 306. For example, the partition 314 may be configured to match the shape of the side surfaces of the first temperature regulating plate 304 and the second temperature regulating plate 306. This is beneficial for improving the effect of restricting the flow direction of high-speed airflow.

[0050] In some embodiments, such as Figure 3 As shown, partition 314 is disposed on the circumferential side of the accommodating space 308. For example, partition 314, the first temperature regulating plate 304, and the second temperature regulating plate 306 together define an accommodating space 308 that is approximately cuboid in shape. In the accommodating space 308, the side facing which the lidar window faces can be open or semi-open. For example, partition 314 may not be disposed in front of the window, or partition 314 may be disposed on both sides in front of the window. This avoids partition 314 blocking the detection light of the lidar and allows the blowing device 310 to spray air towards the lidar window.

[0051] Figure 4 A schematic diagram illustrating the engagement of exemplary fixing plates and adjusting plates consistent with some embodiments of this disclosure is shown. In some embodiments, such as Figure 4 As shown, the partition 414 may include a fixing piece 416 and an adjusting piece 418. The fixing piece 416 may be attached to the first temperature regulating plate 404 or the second temperature regulating plate 406, and the fixing piece 416 may have a notch 420. Figure 4 The first temperature regulating plate 404 shown in the figure may be similar to or the same as the first temperature regulating plate 104, first temperature regulating plate 204 or first temperature regulating plate 304 in the foregoing embodiments; Figure 4 The second temperature regulating plate 406 shown may be similar to or the same as the second temperature regulating plate 106, second temperature regulating plate 206 or second temperature regulating plate 306 in the foregoing embodiments; Figure 4 The partition 414 shown may be similar to or the same as the partition 314 in the foregoing embodiments.

[0052] The adjusting plate 418 is movably disposed at the position of the notch 420, and the adjusting plate 418 can block the notch 420. The position of the notch 420 can be matched with the structure of the first temperature regulating plate 404 or the second temperature regulating plate 406 to reduce the risk of structural interference.

[0053] In some embodiments, the relative positional relationship between the fixing plate 416 and the first temperature regulating plate 404 can be kept fixed. For example, the fixing plate 416 can be fixedly connected to the first temperature regulating plate 404. In some embodiments, the relative positional relationship between the fixing plate 416 and the second temperature regulating plate 406 can be kept fixed. For example, the fixing plate 416 can be fixedly connected to the second temperature regulating plate 406. The fixing plate 416 may include multiple plates, and the multiple plates are combined into a generally "U"-shaped structure, with a gap in the viewing direction of the lidar 200's window 202. The notch 420 may be provided on any one or more of the multiple plates.

[0054] In some embodiments, the second temperature regulating plate 406 and the first temperature regulating plate 404 can be moved relative to each other. For example, the second temperature regulating plate 406 can be moved away from or close to the first temperature regulating plate 404. This allows the accommodating space to match the structural dimensions of the lidar 200. The position and extent of the notch 420 can be configured to cover the range of motion of the second temperature regulating plate 406 relative to the first temperature regulating plate 404, reducing the risk of interference between the second temperature regulating plate 406 and the fixing plate 416 during movement. The adjusting plate 418 is movably disposed at the position of the notch 420, and the notch 420 can be blocked by the adjusting plate 418 to improve the sealing of the accommodating space.

[0055] In some embodiments, the fixing piece 416 may be provided with a slide rail, slot, or multiple mounting holes at the position of the notch 420. The adjusting piece 418 may slide along the slide rail or slot, or be installed at the position of multiple mounting holes to block the notch 420 and avoid the structure of the second temperature regulating plate 406.

[0056] In some embodiments, the second temperature regulating plate 406 and the fixing piece 416 can be snapped together at the notch 420. For example Figure 4 As shown, the second temperature regulating plate 406 includes a claw 422, which extends from the notch 420 of the fixing plate 416 to the side of the fixing plate 416 away from the second temperature regulating plate 406 and engages with the fixing plate 416. This engagement between the second temperature regulating plate 406 and the fixing plate 416 improves the structural stability of the testing fixture, simplifies the process of moving the second temperature regulating plate 406, enables quick assembly and disassembly of the second temperature regulating plate 406, and improves the efficiency of multiple tests performed by the testing fixture.

[0057] In some embodiments, the second temperature control plate 406 may include an interface. The interface can be connected to an external power supply or a temperature regulation medium pipeline. The interface may be located at the notch 420 to avoid the structure of the fixing plate 416, thus preventing excessive bending of cables or pipelines, which could affect service life and temperature regulation efficiency.

[0058] Referring to 4, in some embodiments, the adjusting piece 418 includes a connecting portion 424 that matches the interface on the second temperature regulating plate 406. The connecting portion 424 can move with the adjusting piece 418 relative to the fixed piece 416 and can be connected to an external power supply or a temperature regulating medium pipeline. In some embodiments, the position of the adjusting piece 418 can be adjusted according to the position of the second temperature regulating plate 406 so that the connecting portion 424 is aligned with the interface position of the second temperature regulating plate 406. This simplifies the assembly and disassembly process of the second temperature regulating plate 406. For example, the adjusting piece 418 and the second temperature regulating plate 406 can be connected as a whole through the connecting portion 424 and the interface, and connected as a whole to the fixed piece 416, without being limited by the small internal space of the housing, thus simplifying the operation difficulty of connecting the interface of the second temperature regulating plate 406.

[0059] In some embodiments, the first temperature regulating plate 404 may include an interface. The interface may be connected to an external power supply or a temperature regulating medium pipeline. The interface of the first temperature regulating plate 404 may be located away from the position where the fixing plate 416 and the first temperature regulating plate 404 are in contact, such as on the side of the first temperature regulating plate 404 or on the side away from the fixing plate 416.

[0060] In some embodiments, through holes may be provided on the housing, through which cables or temperature regulating medium pipes connected to the first and second temperature regulating plates extend to the outside of the housing and connect to an external power supply or heat pump. In some embodiments, an elastic material may be provided circumferentially on the through holes of the housing, which can be adhered to and pressed against the surface of the cables or temperature regulating medium pipes to improve the sealing degree inside the housing and reduce the influence of the external ambient temperature on the laser side testing process.

[0061] In some embodiments, the through-holes in the housing may be located on the surface of the housing closest to the first temperature regulating plate. For example, the through-holes may be located on the lower surface of the housing, which helps to reduce wiring difficulty and minimizes bending of cables or temperature regulating medium pipes.

[0062] Figure 5 A cross-sectional view of the housing in an exemplary test fixture consistent with some embodiments of this disclosure is shown. See also Figure 5 In some embodiments, housing 502 includes a viewing window 526. The viewing window 526 allows the detection light and echo of the lidar 200 to pass through. Figure 5 The housing 502 shown may be similar to or the same as the housing 102 in the foregoing embodiments; Figure 5 The first temperature regulating plate 504 shown may be similar to or the same as the first temperature regulating plate 104, first temperature regulating plate 204, first temperature regulating plate 304 or first temperature regulating plate 404 in the foregoing embodiments. Figure 5The second temperature regulating plate 506 shown may be similar to or the same as the second temperature regulating plate 106, second temperature regulating plate 206, second temperature regulating plate 306 or second temperature regulating plate 406 in the foregoing embodiments.

[0063] For example, the viewing window 202 of the lidar 200 corresponds to the viewing window 526. After the lidar 200 is placed in the accommodating space, the detection light emitted by the lidar 200 can pass through the viewing window 526 and be emitted to the outside of the housing 502. The detection light is reflected off the surface of the object and generates an echo, which can pass through the viewing window 526 and be received by the lidar 200.

[0064] The viewing window 526 can be made of a material that is transparent within the wavelength range of the detection light of the lidar 200. In some embodiments, the viewing window 526 can also be transparent within the visible light wavelength range to facilitate observation of the lidar 200 inside the housing 502, for example, to observe whether frost has formed on the viewing window 202 and to perform defrosting in a timely manner.

[0065] In some embodiments, the housing 502 may further include an insulation panel 528. The insulation panel 528 may be connected to a viewing window 526, or the viewing window 526 may be embedded within the insulation panel 528. See also Figure 5 The outer casing 502 includes multiple insulation plates 528, a portion of which is connected to the viewing window 526, forming a cavity. The lidar 200, the first temperature regulating plate 504, and the second temperature regulating plate 506 are all located within the cavity.

[0066] In some embodiments, the cavity formed by the insulation plate 528 and the viewing window 526 is a closed space. For example, gaskets or adhesive are provided between the insulation plates 528 and at the connection points between the insulation plates 528 and the viewing window 526. The closed cavity formed by the insulation plate 528 and the viewing window 526 helps to reduce the influence of the external environment on the internal temperature of the housing 502, thereby improving the accuracy and consistency of performance testing of the lidar 200.

[0067] See Figure 5 In some embodiments, the insulation board 528 may include an outer board 530 and an inner board 532. The outer board 530 and the inner board 532 are spaced apart, and a hollow structure 534 may be formed between the outer board 530 and the inner board 532. In some embodiments, the distance between the outer board 530 and the inner board 532 is, for example, 14 mm. This can improve the thermal insulation performance of the insulation board 528. Optionally, the hollow structure 534 may be filled with thermal insulation material. This is beneficial for further improving the thermal insulation performance of the insulation board 528 and reducing the influence of the external environment on the internal temperature of the outer shell 502. Optionally, the thermal insulation material may include rock wool, aerogel, polyurethane foam, etc.

[0068] In some embodiments, the outer panel 530 and the inner panel 532 may be arranged parallel to each other, and spacers may be provided around the outer panel 530 and the inner panel 532 to form a hollow structure 534 between the outer panel 530 and the inner panel 532. Alternatively, in some embodiments, the outer panel 530 and the inner panel 532 may be formed by hollowing out the center of the same sheet material, and the hollowed-out area is the hollow structure 534.

[0069] In some embodiments, the side of the housing 502 where the viewing window 526 is located, or a portion of the insulation panel 528, can be separated or rotated relative to other insulation panels 528 to open the housing 502. For example, when it is necessary to place or remove the lidar 200, the side of the housing 502 where the viewing window 526 is located, or a portion of the insulation panel 528, can be opened. In some embodiments, both the side of the housing 502 where the viewing window 526 is located and the insulation panel 528 near the second temperature regulating plate 506 can be separated or rotated relative to other insulation panels 528, facilitating operation by the operator.

[0070] like Figure 2 As shown, in some embodiments, the side of the second temperature-regulating plate 206 away from the lidar 200 includes a handle 236. When it is necessary to place or remove the lidar 200, the insulation plate in the housing near the second temperature-regulating plate 206 can be opened, and the lidar 200 can be placed on top of the first temperature-regulating plate 204. The second temperature-regulating plate 206 is then placed over the lidar 200, and the handle 236 facilitates operation by the operator.

[0071] In some embodiments, the position of the second temperature regulating plate 206 within the housing is determined according to the dimensions of the lidar 200. For example, the second temperature regulating plate 206 is located near or attached to the upper surface of the lidar 200. In some embodiments, the surface shape of the side of the second temperature regulating plate 206 near the lidar 200 may match the shape of the upper surface of the lidar 200. For lidars 200 of different specifications and models, the test fixture can provide a variety of mutually matching alternative second temperature regulating plates 206, which can be selected according to the lidar 200 for which performance testing is required.

[0072] refer to Figure 2In some embodiments, the test fixture may further include an adapter 238. The adapter 238 is detachably disposed on the side of the first temperature-regulating plate 204 facing the second temperature-regulating plate 206 for mounting the lidar 200. A mounting portion may be provided on the side of the first temperature-regulating plate 204 facing the second temperature-regulating plate 206. A mating portion matching the mounting portion may be provided on the side of the adapter 238 facing the first temperature-regulating plate 204. The adapter 238 can be connected to the first temperature-regulating plate 204 via the mating portion. A mounting structure matching the lidar 200 may be provided on the side of the adapter 238 away from the first temperature-regulating plate 204. The lidar 200 is fixedly disposed within the accommodating space 208 via the adapter 238. In some embodiments, the adapter 238 may be made of a material with high heat transfer efficiency, such as a metal, which facilitates the first temperature-regulating plate 204 in changing the ambient temperature of the lidar 200.

[0073] In some embodiments, the surface shape of the adapter 238 away from the first temperature regulating plate 204 matches the shape of the lidar 200 facing the first temperature regulating plate 204, and the adapter 238 can be attached to the surface of the lidar 200.

[0074] In some embodiments, the test fixture includes multiple adapters 238 for accommodating different lidars 200. The mating structures of the adapters 238 facing the first temperature-regulating plate 204 can be identical, all engaging with the mounting portion of the first temperature-regulating plate 204 facing the second temperature-regulating plate 206. The mounting structures of the adapters 238 facing the lidar 200 can be matched with the corresponding lidar 200 to accommodate different models and specifications of lidar 200. This improves the applicability of the test fixture.

[0075] In some embodiments, the dimensions of the plurality of adapters 238 in the direction perpendicular to the first temperature regulating plate 204 can be approximately equal, for example, all being 10 mm. When performing performance tests on different models and specifications of lidar 200, the heat transfer efficiency and heat transfer speed of the different adapters 238 are approximately the same, which helps to improve the consistency of the test fixture when testing the performance of different lidar 200s.

[0076] See Figure 2In some embodiments, the test fixture may further include a pad 240. The pad 240 may be positioned on the side of the first temperature-regulating plate 204 away from the second temperature-regulating plate 206, and can be used to adjust the height of the first temperature-regulating plate 204. For example, the height of the first temperature-regulating plate 204 can be changed by replacing the pad 240 with a different size or by adjusting the size of the pad 240 in the direction perpendicular to the first temperature-regulating plate 204. When testing different models and specifications of LiDAR 200 using the test fixture, the pad 240 can be adjusted to ensure that the detection range of different models and specifications of LiDAR 200 is approximately the same, for example, corresponding to the position of the viewing window on the housing, reducing the risk of obstructing the field of view of the LiDAR 200. Furthermore, it simplifies the steps of adjusting the test environment for the LiDAR 200, eliminating the need to repeatedly adjust the position of the object under test relative to the test fixture.

[0077] Finally, it should be noted that the above descriptions are merely embodiments of this disclosure and are not intended to limit this disclosure. Although this disclosure has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this disclosure should be included within the protection scope of this disclosure.

Claims

1. A testing fixture, characterized in that, For performance testing of lidar, the test fixture includes a housing, a first temperature-regulating plate, and a second temperature-regulating plate, wherein... The first temperature regulating plate is disposed inside the outer casing; The second temperature regulating plate is disposed inside the outer casing. At least one of the first temperature regulating plate or the second temperature regulating plate is configured to be movable within the housing; The first temperature regulating plate and the second temperature regulating plate are spaced apart, and there is an accommodating space between the first temperature regulating plate and the second temperature regulating plate. The size of the accommodating space is larger than the size of the lidar housing, and the accommodating space is used to house the lidar. The first and second temperature control plates are configured to change the ambient temperature of the lidar.

2. The test fixture according to claim 1, characterized in that, The test fixture also includes a blower configured to spray air toward the window of the lidar.

3. The testing fixture according to claim 2, characterized in that, The blowing device includes a blowing tube configured to be flexible such that at least one of the air jet direction or air jet position of the blowing tube corresponds to the viewing window.

4. The testing fixture according to claim 2, characterized in that, The test fixture also includes a partition, at least a portion of which is located between the first temperature regulating plate and the second temperature regulating plate.

5. The testing fixture according to claim 4, characterized in that, The partition includes a fixing plate and an adjusting plate, wherein, The fixing plate is attached to the first temperature regulating plate, and the fixing plate has a notch; The adjustment piece is movably disposed at the notch position and covers the notch.

6. The test fixture according to claim 5, characterized in that, The second temperature regulating plate and the fixing piece are engaged at the notch.

7. The test fixture according to claim 1, characterized in that, The housing includes a viewing window configured to allow the detection light and echo of the lidar to pass through.

8. The test fixture according to claim 7, characterized in that, The outer casing also includes an insulation board, which is connected to the viewing window, or the viewing window is embedded in the insulation board to form a cavity, and the lidar is located in the cavity.

9. The test fixture according to claim 8, characterized in that, The insulation board includes an outer panel and an inner panel, which are spaced apart and form a hollow structure, and the hollow structure is filled with insulation material.

10. The test fixture according to claim 1, characterized in that, The testing fixture also includes an adapter, which is detachably disposed on the side of the first temperature regulating plate facing the second temperature regulating plate, for mounting a lidar.

11. The test fixture according to claim 10, characterized in that, The test fixture includes multiple adapters for matching different lidars.

12. The test fixture according to claim 1, characterized in that, The test fixture also includes a pad, which is disposed on the side of the first temperature regulating plate away from the second temperature regulating plate and is configured to adjust the height of the first temperature regulating plate.

Images