CN218213418U - Radar testing device - Google Patents
Radar testing device Download PDFInfo
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- CN218213418U CN218213418U CN202222212678.9U CN202222212678U CN218213418U CN 218213418 U CN218213418 U CN 218213418U CN 202222212678 U CN202222212678 U CN 202222212678U CN 218213418 U CN218213418 U CN 218213418U
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Abstract
The utility model relates to a radar testing arrangement. The radar testing device comprises a wave-transparent incubator, wherein the wave-transparent incubator is provided with a radar to be tested, and the wave-transparent incubator comprises a wave-transparent layer corresponding to the transmitting surface of the radar, so that electromagnetic waves emitted by the radar can be transmitted to the outside through the wave-transparent layer; the test turntable is arranged on the test turntable and comprises a first rotating motor and a second rotating motor, and the transmitting direction of the radar is adjusted by the test turntable through the first rotating motor and the second rotating motor; and the temperature and humidity control box is communicated with the wave-transparent heat insulation box through a gas pipeline and is used for generating air which accords with the radar test conditions and sets the temperature and humidity and conveying the air into the wave-transparent heat insulation box through the gas pipeline. The utility model provides a radar testing arrangement can guarantee that the radar that awaits measuring carries out performance test in the humiture environment of settlement.
Description
Technical Field
The utility model relates to a radar test technical field especially relates to a radar testing arrangement suitable for millimeter wave radar wave penetration test.
Background
At present, millimeter wave radar is an important environmental perception sensor which is indispensable in automobile automatic driving research. The requirements of automobile manufacturers on millimeter wave radar manufacturers are gradually enriched from single radar radio frequency test and performance test requirements, and the requirements of electromagnetic environment and physicochemical environment test such as electromagnetic compatibility, vibration, high and low temperature are met, so that the millimeter wave radar meets the requirements of automobile specifications.
In general, there are two methods for radar performance test in a temperature and humidity environment, one is to directly operate a radar in an environmental chamber and evaluate the test capability. In the test process, because the inner wall of the environment bin is made of metal and the wave-absorbing material cannot be installed, the radar can generate multipath effect when directly working in the environment bin, so that the radar generates interference points, the performance of the radar cannot be correctly evaluated, and only whether the radar is in a working state or not can be judged.
The other method is to take out the radar for performance test after the environment chamber reaches the corresponding temperature and humidity, but in the method, the radar is separated from the environment, partial temperature and humidity are lost, and the test is inaccurate.
SUMMERY OF THE UTILITY MODEL
To the above-mentioned problem of prior art, the utility model provides a radar testing arrangement can guarantee that the radar carries out the capability test in the humiture environment of setting for.
Specifically, the utility model provides a radar testing arrangement, include:
the wave-transmitting incubator is provided with a radar to be tested, and comprises a wave-transmitting layer corresponding to the transmitting surface of the radar, so that electromagnetic waves emitted by the radar can be transmitted to the outside through the wave-transmitting layer;
the test turntable is provided with a first rotating motor and a second rotating motor, the first rotating motor is used for driving the wave-transparent heat-insulating box and the second rotating motor to rotate on a first axis, the second rotating motor is used for driving the wave-transparent heat-insulating box to rotate on a second axis, the first axis and the second axis are perpendicular to each other, and the test turntable adjusts the transmitting direction of the radar through the first rotating motor and the second rotating motor;
and the temperature and humidity control box is communicated with the wave-transparent heat insulation box through a gas pipeline and is used for generating air which accords with radar test conditions and sets temperature and humidity and conveying the air into the wave-transparent heat insulation box through the gas pipeline.
According to the utility model discloses an embodiment, temperature and humidity control box includes temperature and humidity generator and fan blade subassembly, temperature and humidity generator is used for generating the air of setting for the humiture, fan blade subassembly is used for controlling the air current direction to make generated air pass through gas pipeline carries in the ripples insulation can that passes through.
According to the utility model discloses an embodiment, the gas line includes the air supply pipeline and goes out the tuber pipe way, with humiture generator and ripples insulation can form the air cycle route that passes through, guarantee by the air of the settlement humiture that humiture generator generated passes through the air supply pipeline lasts and carries in the ripples insulation can that passes through.
According to the utility model discloses an embodiment, be equipped with the mounting groove in the ripples insulation can that passes through, the examination radar pass through anchor clamps with the mounting groove is inserted and is inserted the cooperation so that the test radar fixes in the ripples insulation can that passes through.
According to an embodiment of the present invention, the test turret further includes a first bracket and a second bracket, the first bracket is L-shaped, and the second bracket is n-shaped;
the upper part of one end of the first bracket is provided with the first rotating motor, the lower part of the end of the first bracket is provided with the second bracket, and the first rotating motor can drive the second bracket to rotate on a first axis;
the second rotating motor and the wave-transparent heat insulation box are arranged on the second support, and the second rotating motor can drive the wave-transparent heat insulation box to rotate on the second axis.
According to an embodiment of the invention, the first axis and the second axis intersect.
According to the utility model discloses an embodiment, the nodical coincidence with the central point of the transmitting surface of the radar of awaiting measuring of first axis and second axis.
According to the utility model discloses an embodiment, radar testing arrangement still includes the integrated control cabinet, with wave-transparent insulation can, test revolving stage and temperature and humidity control box electricity are connected, the integrated control cabinet is used for acquireing temperature and humidity data in the wave-transparent insulation can, the integrated control cabinet is used for control first rotation motor and second rotate the turned angle of motor, the integrated control cabinet is used for control temperature and humidity control box generates the air of setting for the humiture.
According to the utility model discloses an embodiment, wave-transparent insulation can is the cuboid, the size on wave-transparent layer should be greater than the visual field of radar transmission electromagnetic wave beam that awaits measuring at this projection size on wave-transparent layer surface, wave-transparent layer with the electromagnetic wave emission direction of radar that awaits measuring is perpendicular, except wave-transparent layer the rest of wave-transparent insulation can adopt non-metallic foam material to make.
According to the utility model discloses an embodiment, the wave-transparent layer adopts and pierces through the non-metallic wave-transparent material that the loss is not higher than 1dB to make.
The utility model provides a pair of radar testing arrangement adopts the atmospheric control case to be used for generating the air of the settlement humiture that accords with radar test condition to continuously carry the air that generates in the ripples insulation can that passes through that is equipped with the radar that awaits measuring, thereby guarantee that the radar can carry out performance test in the humiture environment of settlement.
It is to be understood that both the foregoing general description and the following detailed description of the present invention are exemplary and explanatory and are intended to provide further explanation of the invention as claimed.
Drawings
The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this application, illustrate embodiment(s) of the invention and together with the description serve to explain the principle of the invention. In the drawings:
fig. 1 shows a schematic structural diagram of a radar testing device according to an embodiment of the present invention.
Wherein the figures include the following reference numerals:
Wave-transparent thermal insulation box 101
Temperature and humidity control box 103
Wave-transparent layer 104
First rotating electric machine 105
Second rotating electric machine 106
Detailed Description
It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict.
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. It is to be understood that the embodiments described are only a few embodiments of the present application and not all embodiments. The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the application, its application, or uses. All other embodiments obtained by a person of ordinary skill in the art based on the embodiments in the present application without making any creative effort belong to the protection scope of the present application.
It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments according to the present application. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, and it should be understood that when the terms "comprises" and/or "comprising" are used in this specification, they specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof, unless the context clearly indicates otherwise.
The relative arrangement of the components and steps, the numerical expressions, and numerical values set forth in these embodiments do not limit the scope of the present application unless specifically stated otherwise. Meanwhile, it should be understood that the sizes of the respective portions shown in the drawings are not drawn in an actual proportional relationship for the convenience of description. Techniques, methods, and apparatus known to those of ordinary skill in the relevant art may not be discussed in detail but are intended to be part of the specification where appropriate. In all examples shown and discussed herein, any particular value should be construed as exemplary only and not as limiting. Thus, other examples of the exemplary embodiments may have different values. It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, further discussion thereof is not required in subsequent figures.
In the description of the present application, it is to be understood that the directions or positional relationships indicated by the directional terms such as "front, rear, upper, lower, left, right", "lateral, vertical, horizontal" and "top, bottom", etc., are generally based on the directions or positional relationships shown in the drawings, and are for convenience of description and simplicity of description only, and in the case of not making a reverse description, these directional terms do not indicate and imply that the device or element being referred to must have a particular orientation or be constructed and operated in a particular orientation, and therefore should not be construed as limiting the scope of the present application; the terms "inner and outer" refer to the inner and outer relative to the profile of the respective component itself.
For ease of description, spatially relative terms such as "over 8230 \ 8230;,"' over 8230;, \8230; upper surface "," above ", etc. may be used herein to describe the spatial relationship of one device or feature to another device or feature as shown in the figures. It will be understood that the spatially relative terms are intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the figures. For example, if a device in the figures is turned over, devices described as "above" or "on" other devices or configurations would then be oriented "below" or "under" the other devices or configurations. Thus, the exemplary terms "at 8230; \8230; 'above" may include both orientations "at 8230; \8230;' above 8230; 'at 8230;' below 8230;" above ". The device may be otherwise variously oriented (rotated 90 degrees or at other orientations) and the spatially relative descriptors used herein interpreted accordingly.
It should be noted that the terms "first", "second", and the like are used to define the components, and are only used for convenience of distinguishing the corresponding components, and the terms have no special meanings unless otherwise stated, and therefore, the scope of protection of the present application is not to be construed as being limited. Further, although the terms used in the present application are selected from publicly known and used terms, some of the terms mentioned in the specification of the present application may be selected by the applicant at his or her discretion, the detailed meanings of which are described in relevant parts of the description herein. Further, it is required that the present application is understood not only by the actual terms used but also by the meaning of each term lying within.
Fig. 1 shows a schematic structural diagram of a radar testing device according to an embodiment of the present invention. As shown in the figure, the utility model provides a radar testing arrangement 100 mainly includes wave-transparent insulation can 101, test revolving stage 102 and atmospheric control case 103.
Wherein, a radar to be tested is arranged in the wave-transparent incubator 101. The wave-transparent incubator 101 includes a wave-transparent layer 104 corresponding to the emitting surface of the radar, and the wave-transparent layer 104 is used for ensuring that the electromagnetic waves emitted by the radar to be measured can be emitted outwards through the wave-transparent layer 104.
The wave-transparent heat-insulating box 101 is arranged on the test turntable 102. The test turret 102 includes a first rotary motor 105 and a second rotary motor 106. The first rotating motor 105 is used for driving the wave-transparent heat-preserving box 101 and the second rotating motor 106 to rotate on the first axis. In this example, the first axis is a vertical axis extending in a vertical direction. It is easy to understand that the wave-transparent insulation can 101 rotates around the first axis, which is equivalent to that the radar to be measured arranged in the wave-transparent insulation can 101 rotates around the vertical axis, and the first rotating motor 105 is used for adjusting the horizontal angle of the radar to be measured. The second rotating motor 106 is used for driving the wave-transparent heat preservation box 101 to rotate on the second axis. In this embodiment, the second axis is a horizontal axis. The first axis and the second axis are perpendicular to each other. The wave-transparent heat insulation box 101 rotates around a second axis, which is equivalent to that the radar to be detected arranged in the wave-transparent heat insulation box 101 rotates around a horizontal axis, and the second rotating motor 106 is used for adjusting the pitching angle of the radar to be detected. In practice, the test turret 102 adjusts the level and the pitch angle (transmission direction) of the electromagnetic wave transmission of the radar to be measured by the first rotating motor 105 and the second rotating motor 106 so that the electromagnetic wave transmitted by the millimeter wave radar can accurately reach the target object to be measured.
The temperature and humidity control box 103 is communicated with the wave-transparent heat insulation box 101 through a gas pipeline 107. The temperature and humidity control box 103 is used for generating air with set temperature and humidity according with radar test conditions and conveying the air into the wave-transparent heat preservation box 101 through the gas pipeline 107, so that the radar to be tested can be always kept under the temperature and humidity condition required by the test.
The utility model provides a pair of radar testing arrangement 100 adopts atmospheric control case 103 to be used for generating the air of the settlement humiture that accords with radar test condition, and the air that will generate continuously carries the transparent ripples insulation can 101 that is equipped with the radar that awaits measuring in, adjusts the electromagnetic wave launch angle of the radar that awaits measuring through test revolving stage 102 to guarantee that the radar that awaits measuring can carry out the capability test in the humiture environment of settlement.
Preferably, the temperature and humidity control box 103 can create accurate and efficient temperature and humidity environmental conditions. The temperature and humidity control box 103 includes a temperature and humidity generator (not shown) and a fan assembly (not shown). The humiture generator is used for generating air with set humiture, and the fan blade assembly is used for controlling the airflow direction, so that the generated air is conveyed into the wave-transparent insulation can 101 through the air pipeline 107.
Preferably, the gas line 107 includes a supply line and an exhaust line. The air supply pipeline and the air outlet pipeline are communicated with the temperature and humidity generator and the wave-transparent heat preservation box 101 and form an air circulation passage together. The air with set temperature and humidity generated by the temperature and humidity generator is continuously conveyed into the wave-transparent heat insulation box 101 through the air supply pipeline, so that the radar to be tested is always kept in the environment required by the test.
Preferably, the wave-transparent heat insulation box 101 is provided with a mounting groove 108. The radar to be tested is inserted and matched with the mounting groove 108 through the clamp so that the radar to be tested is fixed in the wave-transparent heat insulation box 101. In an embodiment, anchor clamps are the cuboid handle of inserting that sets up at the radar back that awaits measuring, and this cuboid is inserted handle and mounting groove 108 and can be inserted the cooperation and can adjust its depth of insertion on mounting groove 108 through inserting the handle to guarantee that the transmitting surface of radar that awaits measuring is in the settlement position.
Preferably, the test turret 102 further includes a first support 109 and a second support 110. The first bracket 109 is L-shaped and the second bracket 110 is n-shaped. The first rotating motor 105 is disposed at an upper portion of one end of the first bracket 109, and the second bracket 110 is disposed at a lower portion of the one end, and the first rotating motor 105 can drive the second bracket 110 to rotate around a vertical axis. The second rotating motor 106 and the wave-transparent heat-insulating box 101 are arranged on the second bracket 110. Specifically, the second rotating motor 106 is disposed outside the tail end of the n-shaped structure, and the inside of the tail end of the n-shaped structure is connected to both sides of the wave-transparent heat-insulating box 101 in a rotating fit manner. The second rotating motor 106 can drive the wave-transparent heat-preservation box 101 to rotate around a horizontal axis. As will be readily understood, the second rotating motor 106 drives the wave-transparent thermal insulation box 101 and the radar to be measured to rotate around the horizontal axis, so as to adjust the pitch angle of the radar to be measured. The first rotating motor 105 rotates the wave-transparent heat-preserving box 101 and the radar to be measured around the vertical axis through the second bracket 110 to adjust the horizontal angle of the radar to be measured.
Preferably, the first axis and the second axis intersect. More preferably, the intersection of the first axis and the second axis coincides with a centre point of the emitting surface of the radar to be tested. As mentioned above, the rectangular plug handle arranged on the back of the radar to be detected is in plug fit with the mounting groove 108 in the wave-transparent heat insulation box 101, the plug depth of the plug handle is adjusted, and the transmitting surface of the radar to be detected is ensured to be at the set position. The set position refers to the coincidence of the center point of the transmitting surface of the radar to be measured and the intersection point of the first axis and the second axis. Due to the design, the test installation process is greatly accelerated, the adjusting angles of the horizontal direction and the pitching direction of the radar to be tested are consistent with the rotating angle set by the test rotary table 102, and the test precision of the radar to be tested is guaranteed.
Preferably, the radar testing apparatus 100 further includes an integrated control cabinet 111. The integrated control cabinet 111 is electrically connected with the wave-transparent heat-preserving box 101, the testing rotary table 102 and the temperature and humidity control box 103. The integrated control cabinet 111 is used for acquiring temperature and humidity data in the wave-transparent heat preservation box 101. Specifically, a plurality of patch type temperature and humidity sensors are further arranged in the wave-transparent heat preservation box 101 and used for collecting temperature and humidity environment data of the radar in the wave-transparent heat preservation box 101. The integrated control cabinet 111 can monitor the temperature and humidity in the wave-transparent heat preservation box 101 in time through the temperature and humidity sensor. The integrated control cabinet 111 is also used for controlling the temperature and humidity control box 103 to generate air with set temperature and humidity. The integrated control cabinet 111 can also be connected with an upper computer through a network cable. According to different test requirements, the upper computer sends out a control instruction, so that the temperature and humidity control box 103 generates air with temperature and humidity set by different test requirements. The integrated control cabinet 111 is also used for controlling the rotation angles of the first rotating motor 105 and the second rotating motor 106 so as to adjust the level and the pitch angle of the radar to be measured. It should be noted that the integrated control cabinet 111 may be in communication with the wave-transparent thermal insulation box 101, the test turntable 102, and the temperature and humidity control box 103 through a communication cable 112.
Preferably, the wave-transparent thermal insulation box 101 is rectangular. The size of the wave-transmitting layer is larger than the projection size of the view field of the electromagnetic wave beam emitted by the radar to be detected on the surface of the wave-transmitting layer. In other words, the overall design size of the wave-transparent thermal insulation box 101 should be determined according to the horizontal and vertical field angle range (FOV) of the electromagnetic waves emitted by the radar, so as to ensure that all the electromagnetic waves emitted by the radar to be detected are emitted to the external environment through the wave-transparent layer 104 of the box. The transmitting surface of the radar to be detected is opposite to the wave-transparent layer 104 at intervals, and the wave-transparent layer 104 is perpendicular to the electromagnetic wave transmitting direction of the radar to be detected. Furthermore, except the wave-transmitting layer 104, the other peripheral structural parts of the wave-transmitting incubator 101 are made of non-metal foaming materials. The nonmetal foaming material with good heat preservation performance and good electromagnetic wave absorbing property can ensure that the electromagnetic wave emitted by the radar to be tested can not be reflected for many times in the box body of the wave-transparent heat preservation box 101 to form a multipath effect, so that the accuracy of radar test is ensured.
Preferably, the wave-transparent layer 104 is made of a non-metal wave-transparent material with a penetration loss not higher than 1dB, so as to ensure that the detection environment of the radar at real high and low temperatures and different humidity is restored as much as possible.
When a wave-transparent test in a high-temperature and low-temperature environment is carried out, a radar to be tested and a clamp thereof are firstly inserted into a square mounting groove 108 in a box body of a wave-transparent heat preservation box 101, the coincidence of the center point of the emitting surface of the radar to be tested and the intersection point of a first axis and a second axis is confirmed, and a wave-transparent layer 104 is covered and fixed with the box body.
The temperature and humidity control box 103 and the integrated control cabinet 111 are opened, the temperature, humidity environment and corresponding change curves required by the test are preset through the integrated control cabinet 111, and after the wave-transparent heat preservation box 101 reaches the preset environment temperature and humidity conditions, a target object (generally a standard corner reflector or a radar target simulator and the like) is placed in the normal direction of the radar to be tested. The horizontal and pitching rotation angles of the radar to be detected are controlled through the first rotating motor 105 and the second rotating motor 106, and the detection capability and detection accuracy of the radar to be detected in different temperature and humidity environments and at different angles are tested.
The utility model provides a pair of radar testing arrangement adopts the atmospheric control case to be used for generating the air of the settlement humiture that accords with radar test condition, forms the air circulation route through gas piping and continuously carries the air that generates to be equipped with the radar that awaits measuring in the ripples insulation can that passes through, adjusts the electromagnetic wave launch angle of the radar that awaits measuring through the test revolving stage to guarantee that the radar that awaits measuring can carry out the capability test in the humiture environment of settlement. In addition, the peripheral structure part of the wave-transparent heat-preservation box is made of non-metal foaming materials except for the wave-transparent layer, so that the electromagnetic waves emitted by the radar to be tested can not be reflected for multiple times in the box body of the wave-transparent heat-preservation box to form a multipath effect, and the accuracy of radar testing is guaranteed.
It will be apparent to those skilled in the art that various modifications and variations can be made to the above-described exemplary embodiments of the present invention without departing from the spirit and scope of the invention. Thus, it is intended that the present invention cover the modifications and variations of this invention provided they come within the scope of the appended claims and their equivalents.
Claims (10)
1. A radar testing apparatus, comprising:
the wave-transparent heat preservation box is provided with a radar to be tested and comprises a wave-transparent layer corresponding to the emission surface of the radar, so that electromagnetic waves emitted by the radar can be transmitted outwards through the wave-transparent layer;
the test turntable is arranged on the test turntable and comprises a first rotating motor and a second rotating motor, the first rotating motor is used for driving the wave-transparent heat-insulating box and the second rotating motor to rotate on a first axis, the second rotating motor is used for driving the wave-transparent heat-insulating box to rotate on a second axis, the first axis and the second axis are perpendicular to each other, and the test turntable adjusts the transmitting direction of the radar through the first rotating motor and the second rotating motor;
and the temperature and humidity control box is communicated with the wave-transparent heat insulation box through a gas pipeline and is used for generating air which accords with radar test conditions and sets temperature and humidity and conveying the air into the wave-transparent heat insulation box through the gas pipeline.
2. The radar testing device of claim 1, wherein the temperature and humidity control box comprises a temperature and humidity generator and a fan assembly, the temperature and humidity generator is used for generating air with set temperature and humidity, and the fan assembly is used for controlling the direction of air flow so that the generated air is conveyed into the wave-transparent incubator through the air pipeline.
3. The radar testing device according to claim 2, wherein the gas pipeline includes an air supply pipeline and an air outlet pipeline, and forms an air circulation path with the temperature and humidity generator and the wave-transparent heat-preservation box, so as to ensure that the air with set temperature and humidity generated by the temperature and humidity generator is continuously conveyed into the wave-transparent heat-preservation box through the air supply pipeline.
4. The radar testing device of claim 1, wherein a mounting groove is formed in the wave-transparent heat-preservation box, and a radar to be tested is inserted and matched with the mounting groove through a clamp so that the radar to be tested is fixed in the wave-transparent heat-preservation box.
5. The radar testing device of claim 1, wherein the test turret further includes a first bracket and a second bracket, the first bracket having an L-shape and the second bracket having a chevron shape;
the upper part of one end of the first bracket is provided with the first rotating motor, the lower part of the end of the first bracket is provided with the second bracket, and the first rotating motor can drive the second bracket to rotate on a first axis;
the second rotating motor and the wave-transparent heat insulation box are arranged on the second support, and the second rotating motor can drive the wave-transparent heat insulation box to rotate on the second axis.
6. The radar testing apparatus of claim 5 wherein the first axis and the second axis intersect.
7. Radar testing apparatus according to claim 6, wherein the intersection of the first and second axes coincides with a centre point of the emitting surface of the radar to be tested.
8. The radar testing device according to claim 1, further comprising an integrated control cabinet electrically connected to the wave-transparent thermal insulation box, the testing turntable, and the temperature and humidity control box, wherein the integrated control cabinet is configured to obtain temperature and humidity data in the wave-transparent thermal insulation box, the integrated control cabinet is configured to control a rotation angle of the first rotating motor and the second rotating motor, and the integrated control cabinet is configured to control the temperature and humidity control box to generate air with a set temperature and humidity.
9. The radar testing device of claim 1, wherein the wave-transparent thermal insulation box is a cuboid, the size of the wave-transparent layer is larger than the projection size of the field of view of the electromagnetic wave beam emitted by the radar to be tested on the surface of the wave-transparent layer, the wave-transparent layer is perpendicular to the electromagnetic wave emission direction of the radar to be tested, and the rest of the wave-transparent thermal insulation box except the wave-transparent layer is made of non-metal foaming materials.
10. The radar testing device of claim 8, wherein the wave-transparent layer is made of a non-metallic wave-transparent material having a transmission loss of not more than 1 dB.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222212678.9U CN218213418U (en) | 2022-08-22 | 2022-08-22 | Radar testing device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222212678.9U CN218213418U (en) | 2022-08-22 | 2022-08-22 | Radar testing device |
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| Publication Number | Publication Date |
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| CN218213418U true CN218213418U (en) | 2023-01-03 |
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| CN202222212678.9U Active CN218213418U (en) | 2022-08-22 | 2022-08-22 | Radar testing device |
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