Millimeter wave radar test board with variable reflectivity

Abstract

The utility model discloses a millimeter wave radar test plate with variable reflectivity. The test plate comprises a base, a plurality of millimeter wave absorbing plates with different thicknesses, a plurality of millimeter wave reflecting plates with different reflecting duty ratios and a top plate, wherein the base and the top plate are connected through a connecting support, a plurality of first assembling grids corresponding to the millimeter wave absorbing plates and a plurality of second assembling grids corresponding to the millimeter wave reflecting plates are formed through the connecting support, and the millimeter wave absorbing plates are detachably placed in the corresponding first assembling grids. And the millimeter wave reflecting plates are detachably placed in the corresponding second assembly grids. According to the utility model, when the response of the millimeter wave radar to objects with different reflectivity needs to be tested, only the corresponding millimeter wave absorbing plate and the millimeter wave reflecting plate need to be selected according to actual needs and are placed into the corresponding assembly grids for combination, and the objects with different reflectivity do not need to be changed, so that the operation is greatly simplified, and the test efficiency is improved.

Description

Technical Field

[0001] The utility model relates to the field of millimeter-wave radars, and particularly to a millimeter-wave radar test board with variable reflectivity. Background Art

[0002] A millimeter-wave radar refers to a radar operating in the millimeter-wave frequency band. Due to the advantages of high detection accuracy and strong anti-interference ability of millimeter-wave radars, they are widely used in the field of intelligent driving.

[0003] In order to test the performance of millimeter-wave radars, it is necessary to test the performance parameters of millimeter-wave radars. For example, test the response to objects with different reflectivities. In the prior art, in order to test the response of millimeter-wave radars to objects with different reflectivities, it is often necessary to change objects with different reflectivities for testing. This method is not only time-consuming and laborious, but also has low test efficiency. Summary of the Utility Model

[0004] The purpose of the utility model is to provide a millimeter-wave radar test board with variable reflectivity to improve the above problems.

[0005] The utility model provides a millimeter-wave radar test board with variable reflectivity, which includes: a base, multiple millimeter-wave absorbing plates with different thicknesses, multiple millimeter-wave reflecting plates with different reflection duty cycles, and a top plate; wherein, the base and the top plate are connected by a connecting bracket, and multiple first assembly grids corresponding to the millimeter-wave absorbing plates and second assembly grids corresponding to the millimeter-wave reflecting plates are formed through the connecting bracket. The millimeter-wave absorbing plates are detachably placed in the first assembly grids corresponding to them, and the millimeter-wave reflecting plates are detachably placed in the second assembly grids corresponding to them.

[0006] Preferably, adjacent assembly grids are mutually attached.

[0007] Preferably, the top plate is a snap-fastener plate.

[0008] Preferably, the number of millimeter-wave absorbing plates is 4, and the thickness ratio is 1:2:2:5.

[0009] Preferably, the number of millimeter-wave reflecting plates is 5, and the reflection duty cycles are 10%, 20%, 30%, 30%, and 50% respectively.

[0010] Preferably, the millimeter-wave reflecting plate is composed of several millimeter-wave reflecting unit plates.

[0011] In this embodiment, by combining 0 to 4 millimeter-wave absorbing plates with different thicknesses, 11 kinds of absorbing plates with different thicknesses can be formed; by combining 1 to 5 millimeter-wave reflecting plates with different reflection duty cycles, 10 kinds of reflecting plates with different reflectivities can be formed; by combining absorbing plates with different thicknesses and reflecting plates with different reflectivities, 110 different millimeter-wave radar test plates can be formed, so that the reflectivity of the millimeter-wave radar can be conveniently tested.

[0012] Among them, when it is necessary to test the response of the millimeter-wave radar to objects with different reflectivities, only the corresponding millimeter-wave absorbing plate and millimeter-wave reflecting plate need to be selected according to the actual needs and placed in the corresponding assembly grid for combination, without changing the objects with different reflectivities, which greatly simplifies the operation and improves the test efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] In order to more clearly illustrate the technical solutions of the present invention, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, other drawings (such as changing the hollowing method of the reflection unit plate) can be obtained based on these drawings without creative efforts.

[0014] Figure 1 FIG. 1 is a schematic structural diagram of a millimeter-wave radar test plate with variable reflectivity provided by the first embodiment of the present invention.

[0015] Figure 2 FIG. 2 is a side view of a millimeter-wave radar test plate with variable reflectivity provided by the first embodiment of the present invention.

[0016] Figures 3(a)-3(e) FIG. 3 is a schematic diagram of a millimeter-wave reflection unit plate with different reflection duty cycles.

[0017] Figure 4 FIG. 4 is a schematic flow chart of a millimeter-wave radar test method provided by an embodiment of the present invention. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0018] The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0019] Please refer to Figure 1 and Figure 2, the first embodiment of the present utility model provides a millimeter-wave radar test board with variable reflectivity, which includes:

[0020] A base 10, multiple millimeter-wave absorbing plates with different thicknesses, multiple millimeter-wave reflecting plates with different reflection duty cycles, and a top plate 20; wherein, the base 10 and the top plate 20 are connected by a connecting bracket, and a plurality of first assembly grids corresponding to the millimeter-wave absorbing plates and second assembly grids corresponding to the millimeter-wave reflecting plates are formed through the connecting bracket. The millimeter-wave absorbing plates are detachably placed in the first assembly grids corresponding to them, and the millimeter-wave reflecting plates are detachably placed in the second assembly grids corresponding to them.

[0021] In this embodiment, the connecting bracket can be a hollow frame structure, and the frame forms individual assembly grids to accommodate the millimeter-wave absorbing plates and the millimeter-wave reflecting plates. It should be noted that the border of the frame structure should be as narrow as possible to avoid the millimeter waves being emitted to the border and affecting the test results.

[0022] In this embodiment, the top plate 20 is a snap plate, which can snap together a plurality of first assembly grids and a plurality of second assembly grids to ensure the overall stability of the structure.

[0023] In this embodiment, particularly, the number of the millimeter-wave absorbing plates is 4, and the thickness ratio is 1:2:2:5. In this way, through the combination of these 4 millimeter-wave absorbing plates with different thicknesses, 10 different thickness absorbing plates can be formed. As Figure 1 shown, it includes millimeter-wave absorbing plates 1-4, and each millimeter-wave absorbing plate is arranged in the first assembly grid corresponding to its thickness. Of course, it can be understood that the number and thickness of the millimeter-wave absorbing plates can be set according to actual needs, and these solutions are all within the protection scope of the present utility model.

[0024] In this embodiment, particularly, the number of the millimeter-wave reflecting plates is 5, and their reflection duty cycles are 10%, 20%, 30%, 30%, and 50% respectively. In this way, through the combination of 5 millimeter-wave reflecting plates with different reflection duty cycles, 10 different reflection duty cycles (reflectivities) of reflecting plates can be formed, as Figure 1 shown in and Figures 3(a)-3(e), it includes millimeter-wave reflection unit plates 5-9. Among them, the reflection duty cycles of the millimeter-wave reflection unit plates placed in Figures 3(c) and (d) are both 30%, but their placement positions are different, that is, they are placed in different second assembly grids. Of course, it can be understood that the number and reflection duty cycle ratio of the millimeter-wave reflecting plates can be set according to actual needs, and these solutions are all within the protection scope of the present utility model.

[0025] In addition, it should be noted that in some embodiments of the present utility model, the millimeter-wave reflector can be composed of several millimeter-wave reflection unit plates. For example, for a millimeter-wave reflector with a size of 40 cm * 40 cm and a reflection duty cycle of 10%, it can be composed of 16 millimeter-wave reflection unit plates with a size of 10 cm * 10 cm and a reflection duty cycle of 10%. In this way, the size of the millimeter-wave reflector can be set according to actual needs, so as to meet the test requirements in various scenarios.

[0026] Specifically, as Figure 4 shown, the test process of this embodiment is as follows:

[0027] S201, obtain the target reflection duty cycle and the target thickness of the microwave absorber to be tested;

[0028] S202, select the corresponding millimeter-wave absorber combination according to the target thickness of the microwave absorber, and place it in the corresponding first assembly grid;

[0029] S203, select the corresponding millimeter-wave reflector combination according to the target reflection duty cycle, and place it in the corresponding second assembly grid;

[0030] S204, control the millimeter-wave radar to send a millimeter-wave detection signal to the millimeter-wave radar test board, receive the corresponding echo, and test the performance of the millimeter-wave radar according to the echo.

[0031] In this embodiment, through the combination of 0 to 4 millimeter-wave absorbers with different thicknesses, 11 different thicknesses of microwave absorbers can be formed; through the combination of 1 to 5 millimeter-wave reflectors with different reflection duty cycles, 10 reflectors with different reflectivities can be formed; through the combination of microwave absorbers with different thicknesses and reflectors with different reflectivities, 110 different millimeter-wave radar test boards can be formed, so that the test of the reflectivity of the millimeter-wave radar can be conveniently carried out.

[0032] Among them, when it is necessary to test the response of the millimeter-wave radar to objects with different reflectivities, only the corresponding millimeter-wave absorber and millimeter-wave reflector need to be selected according to actual needs, placed in the corresponding assembly grid for combination, and there is no need to change objects with different reflectivities, which greatly simplifies the operation and improves the test efficiency.

[0033] The above is only a preferred specific embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any changes or substitutions that can be easily thought of by those skilled in the art within the technical scope disclosed by the present utility model should be covered by the protection scope of the present utility model. Therefore, the protection scope of the present utility model should be subject to the protection scope of the claims.

Claims

1. A millimeter wave radar test board with variable reflectivity, characterized in that: include: A base, a plurality of millimeter-wave absorbing plates of different thicknesses, a plurality of millimeter-wave reflecting plates with different reflection duty ratios, and a top plate; wherein the base and the top plate are connected via a connecting bracket, and a plurality of first assembly grids corresponding to the millimeter-wave absorbing plates and a second assembly grid corresponding to the millimeter-wave reflecting plates are formed via the connecting bracket, the millimeter-wave absorbing plates are detachably placed in the first assembly grids corresponding thereto, and the millimeter-wave reflecting plates are detachably placed in the second assembly grids corresponding thereto.

2. The variable reflectivity millimeter wave radar test board according to claim 1, characterized in that: Adjacent assembly grids fit into each other.

3. The variable reflectivity millimeter wave radar test board according to claim 1, characterized in that: The top plate is a gusset plate.

4. The variable reflectivity millimeter wave radar test board according to claim 1, characterized in that: The number of millimeter wave absorbing panels is 4, and the thickness ratio is 1:2:2:

5.

5. The variable reflectivity millimeter wave radar test board according to claim 1, characterized in that: There are 5 millimeter wave reflectors, and the reflection duty ratios are 10%, 20%, 30%, 30%, and 50% respectively.

6. The variable reflectivity millimeter wave radar test board according to claim 1, characterized in that: The millimeter wave reflection plate is composed of a plurality of millimeter wave reflection unit plates.

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