Millimeter wave radar directional radiation test system

Abstract

This utility model discloses a millimeter-wave radar directional radiation testing system, comprising at least one set of dark boxes, angle reflectors, and radars deployed in the same room. The cooperative structure of each set of dark boxes, angle reflectors, and radars is as follows: a dark box, an angle reflector, and a radar; a directional radiation aperture is formed on one wall of the dark box; the angle reflector is positioned outside the dark box on the side with the directional radiation aperture, with its signal transceiver surface facing the directional radiation aperture; the radar is positioned inside the dark box; the signal transceiver surface of the angle reflector and the plane containing the directional radiation aperture are parallel to each other; the center of the radar antenna, the center of the directional radiation aperture, and the center of the angle reflector are on the same straight line; a cone-shaped clearance space is provided from the center of the radar antenna towards the direction of the angle reflector, passing through the directional radiation aperture. This utility model places the angle reflector outside the dark box and achieves directional radiation and reflection reception of the radar beam through the directional radiation aperture, reducing the size of the dark box, enhancing anti-interference capabilities, and facilitating deployment on factory production lines.

Description

Technical Field

[0001] This utility model belongs to the field of radar testing technology, specifically relating to a millimeter-wave radar directional radiation testing system. Background Technology

[0002] When calibrating, testing, and evaluating the performance of millimeter-wave radar, angle correction, testing, and evaluation are generally performed using the radar echo from a corner reflector. However, if other highly reflective objects are present in the surrounding environment, they will generate strong clutter signals, affecting the radar test results and leading to inaccurate results.

[0003] To shield against clutter interference, existing technologies typically employ physical shielding methods, such as setting up microwave anechoic chambers or large shielded enclosures to house the millimeter-wave radar and testing equipment. However, these methods are costly, bulky, and space-consuming, making them inconvenient to deploy. Alternatively, existing technologies may use clearance zones (rooms) within a separate physical space to house the radar testing system (radar and angle reflector). At least 1.5–2 meters of physical clearance must be maintained around the testing system in all directions to ensure that clutter is kept at a low energy level, insufficient to affect the testing and angle correction results. However, this approach requires a large physical clearance space, which is difficult to achieve in the dense and compact environment of a factory production line. Furthermore, factory environments are difficult to completely isolate and clear, making them susceptible to interference.

[0004] Therefore, there is an urgent need for an efficient and low-cost radar directional radiation testing solution suitable for factory environments, which can enhance anti-interference capabilities while reducing environmental space requirements. Utility Model Content

[0005] This invention provides a millimeter-wave radar directional radiation testing system, which aims to reduce the manufacturing cost of radar radiation testing systems, reduce space occupation, enable the parallel testing of multiple radars in the same indoor space and mitigate mutual interference during parallel testing of multiple radars; and unify the standard position of radars during multi-angle testing.

[0006] This utility model provides a millimeter-wave radar directional radiation testing system, including at least one set of dark boxes, angle reflectors, and radars arranged in the same room. The cooperative structure of each set of dark boxes, angle reflectors, and radars is as follows: a directional radiation hole is opened on one wall of the dark box; the angle reflector is located outside the dark box on the side where the directional radiation hole is opened, and the signal transceiver surface of the angle reflector faces the directional radiation hole; the radar is located inside the dark box; the signal transceiver surface of the angle reflector and the plane where the directional radiation hole is located are parallel to each other; the center of the radar antenna, the center of the directional radiation hole, and the center of the angle reflector are located on the same straight line; a cone-shaped clearance space is provided from the center of the radar antenna towards the direction of the angle reflector, passing through the directional radiation hole.

[0007] As a preferred technical solution, the directional radiation hole is opened in the side wall of the dark box, the radar is set inside the dark box in a side-illuminating manner, and the corner reflector is set in a bottom-supported manner facing to the side; or, the directional radiation hole is opened in the top wall of the dark box, the radar is set inside the dark box in an upward-illuminating manner, and the corner reflector is set in a downward-hanging manner.

[0008] As a preferred technical solution, the millimeter-wave radar directional radiation testing system further includes an angle reflector fixing device, which is disposed on the outside of the dark box on the side where the directional radiation hole is opened; the angle reflector is disposed on the angle reflector fixing device.

[0009] As a preferred technical solution, the millimeter-wave radar directional radiation testing system further includes a test bracket, which is set inside the dark box; the radar is set on the test bracket in a multi-dimensionally adjustable orientation.

[0010] As a preferred technical solution, the millimeter-wave radar directional radiation testing system further includes a radar fixture, and the radar is fixedly mounted on the test bracket by the radar fixture.

[0011] As a preferred technical solution, the distance D3 between the center of the radar antenna and the inner side wall of the dark box is ≥10λ, the distance D4 between the center of the angular reflector and the center of the radar antenna is ≥3δ, and the diameter of the directional radiation aperture is d≥10λ; the distance D1 between the center of the radar antenna and the inner side of the top wall of the dark box is ≥10λ, and the distance D2 between the center of the radar antenna and the inner side of the bottom wall of the dark box is ≥10λ; where λ is the radar carrier wavelength and δ is the radar range resolution.

[0012] As a preferred technical solution, the cone-shaped clearance space is a cone-shaped clearance space with the center of the radar antenna as the center, a radius of D5≥6δ, and passing through the directional radiation aperture.

[0013] As a preferred technical solution, the corner fixing device is a fixing device made of non-metallic material or metal material wrapped with wave-absorbing material.

[0014] As a preferred technical solution, the radar tooling fixture is a tooling fixture made of non-metallic material.

[0015] As a preferred technical solution, the test bracket is a bracket made of non-metallic material.

[0016] The millimeter-wave radar directional radiation testing system provided by this utility model only requires placing the radar inside a small dark box and setting the angle reflector outside the dark box. By opening a directional radiation hole in one wall of the dark box, the directional radiation and reflection reception of the radar beam can be completed, thereby realizing millimeter-wave radar testing. The technical solution of this utility model adopts a small microwave dark box, which minimizes the size of the dark box and reduces costs. In addition, by narrowing the radar beam radiation range through the directional radiation hole, the anti-interference capability of the radar test system is effectively enhanced, reducing the interference requirements of the radar test system from the surrounding environment. Moreover, multiple dark boxes, angle reflectors and radars can be flexibly deployed in the same room (in the same factory building), which facilitates the parallel testing of multiple radars and can also alleviate mutual interference when multiple radars are tested in parallel. It is also not easily affected by interference from other personnel or equipment on the production line, making it easy to deploy on the factory production line. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1 This is a schematic diagram of the structure of the millimeter-wave radar directional radiation testing system provided in Embodiment 1 of this utility model.

[0019] Figure 2 This is a schematic diagram of the structure of the millimeter-wave radar directional radiation testing system provided in Embodiment 2 of this utility model. Detailed Implementation

[0020] To make the technical solution of the present invention clearer and its technical advantages more apparent, the technical solution of the present invention will be clearly and completely described below in conjunction with specific embodiments. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of the present invention.

[0021] It should be noted that, in this document, the terms “comprising,” “including,” or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus.

[0022] In the description of this invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "clockwise", "counterclockwise", "front", "back", etc., indicating the orientation or positional relationship, are all based on the orientation or relative positional relationship shown in the accompanying drawings, and are intended to facilitate a clear description of the structure of the product or device, and are not intended to limit the actual orientation of the product or device during production, use, sales, etc.

[0023] Furthermore, the terms "first" and "second" are used only for distinguishing purposes in the description 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 that feature. In the description of this invention, unless otherwise stated, "a plurality of" means two or more, unless otherwise expressly defined. The technical solutions of the embodiments of this invention will be explained and described below with reference to the accompanying drawings, but the following embodiments are only preferred embodiments of this invention and not all of them.

[0024] In this document, the term "embodiment" means that a particular feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of the present invention. The appearance of this phrase in various places throughout the specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment mutually exclusive with other embodiments. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.

[0025] See Figure 1 As shown, as a basic implementation method, Embodiment 1 provides a millimeter-wave radar directional radiation testing system, including at least one set of angle reflectors 1, angle reflector fixing devices 2, radar 3, test brackets 4 and dark boxes 6, all installed in the same room.

[0026] Among them, one side wall of the dark box 6 ( Figure 1A directional radiation hole 7 is provided on the right side wall of the dark box 6; an angle reflector fixing device 2 is set outside the dark box 6, and is located outside the directional radiation hole 7 on one side; an angle reflector 1 is set on the angle reflector fixing device 2, and the signal transmitting and receiving surface of the angle reflector faces the directional radiation hole 7; specifically, the angle reflector fixing device 2 is an inverted L-shaped bracket, and the angle reflector 1 is set on the upper side of the inverted L-shaped bracket; a test bracket 4 is set inside the dark box 6; a radar 3 is set on the test bracket 4; the signal transmitting and receiving surface of the angle reflector 1 and the plane where the directional radiation hole 7 is located ( Figure 1 The longitudinal plane where the directional radiation aperture 7 is located is parallel to each other; the center of the antenna of radar 3, the center of the directional radiation aperture 7 and the center of the angle reflector 1 are located on the same straight line L1; the center of the antenna of radar 3, the center of the directional radiation aperture 7 and the center of the angle reflector 1 are connected in a straight line; a cone-shaped clearance space C1 is provided through the directional radiation aperture 7 in the direction of the angle reflector 1 from the center of the antenna of radar 3.

[0027] The millimeter-wave radar directional radiation testing system provided in the above embodiment places the angle reflector 1 outside the dark box 6. By opening a directional radiation hole 7 on one wall of the dark box 6, the directional radiation and reflection reception of the radar beam are realized, thereby achieving millimeter-wave radar testing. Moreover, it can be implemented using a small microwave dark box, minimizing the size of the dark box and reducing costs. In this embodiment, the wall material of the dark box only needs to meet the requirement of preventing radar wave transmission, and there is no need to lay absorbing material on the inner wall. In addition, the directional radiation hole 7 narrows the radar beam radiation range, effectively enhancing the anti-interference capability in complex testing environments, reducing the high requirements of the radar testing system on the surrounding environment, and making it less susceptible to interference from other personnel or equipment on the production line, which is convenient for deployment on the factory production line. Multiple dark boxes, angle reflectors, and radars can be flexibly deployed in the same room (e.g., in the same factory building) as groups, which facilitates parallel testing of multiple radars, as long as the cooperation relationship of each component in the group is as described above, and there is no interference between groups. Moreover, the factory building does not require large-scale decoration according to the dark room standard. In addition, the angle reflection fixing device 2 and the test bracket 4 are fixed by the relative dark box 6 to ensure that the relative positions of the radar under test 3, the directional radiation hole 7 and the angle reflection 1 remain unchanged during each test.

[0028] To meet different testing needs, radar 3 is mounted on test bracket 4 with multi-dimensional adjustable orientation, such as horizontal rotation, vertical swing, or horizontal rotation combined with vertical swing. Of course, regardless of how the orientation of radar 3 is adjusted, it must always be ensured that the center of radar 3's antenna, the center of directional radiation aperture 7, and the center of angle reflector 1 are on the same straight line L1.

[0029] Furthermore, provided that the signal transmitting and receiving surfaces of the angle reflector 1 and the plane containing the directional radiation aperture 7 are parallel to each other, and that the antenna center of the radar 3, the center of the directional radiation aperture 7, and the center of the angle reflector 1 are located on the same straight line L1, the angle reflector 1 can be directly installed on the outside of the dark box 6 on the side where the directional radiation aperture 7 is located, and the radar 3 can also be directly installed inside the dark box 6. That is, the angle reflector fixing device 2 and the test bracket 4 are not necessary.

[0030] See also Figure 1 As an optimized implementation, the millimeter-wave radar directional radiation testing system provided in this embodiment also includes a dedicated radar fixture 5, on which the radar 3 is fixedly mounted on the test bracket 4. The dedicated radar fixture 5 has a dedicated connection and assembly mechanism adapted to various types of radar 3 and a universal connection mechanism applicable to the test bracket 4, which can more stably and conveniently fix the radar 3 on the test bracket 4.

[0031] See also Figure 1 As a more refined control implementation, the distance D3 between the antenna center of radar 3 and the inner side wall of the dark box 6 is ≥10λ, the distance D4 between the center of the angle reflector 1 and the antenna center of radar 3 is ≥3δ, and the diameter of the directional radiation aperture 7 is ≥10λ; the distance D1 between the antenna center of radar 3 and the inner top wall of the dark box 6 is ≥10λ, and the distance D2 between the antenna center of radar 3 and the inner bottom wall of the dark box 6 is ≥10λ; where λ is the radar carrier wavelength and δ is the radar range resolution. Through the above specific implementation settings, radar testing can be achieved more accurately, and its feasibility has been proven by simulation, with results meeting expectations.

[0032] See also Figure 1 As an optimized implementation, the cone-shaped clearance space C1 is a cone-shaped clearance space set in the direction of the antenna center of radar 3 towards the direction of angle 1, with the antenna center of radar 3 as the center, a radius of D5≥6δ, and passing through the directional radiation hole 7. Specifically, the clearance space C1 can be formed by a protective net of a specific shape, a partition cover, or by using a directional dust removal mechanism, as long as it is ensured that there are no other moving objects such as metals within the clearance space C1.

[0033] Furthermore, as a further optimized implementation, the angle-reflecting fixing device 2 is preferably a fixing device made of non-metallic material or metal material wrapped with absorbing material; the radar tooling fixture 5 is preferably a tooling fixture made of non-metallic material; and the test bracket 4 is preferably a bracket made of non-metallic material; thereby reducing the clutter effect caused by metal devices.

[0034] See Figure 2As shown, in another feasible embodiment, in the millimeter-wave radar directional radiation testing system provided in Embodiment 2, the basic cooperative relationship between the components such as the angle reflector 1, the angle reflector fixing device 2, the radar 3, the test bracket 4, and the dark box 6 remains unchanged. The main difference compared to Embodiment 1 is that the directional radiation hole 7 of the dark box 6 is opened on the top wall of the box, the radar 3 is set inside the dark box 6 in an upward irradiation manner, the angle reflector fixing device 2 in Embodiment 2 is a linear hoisting mechanism, and the angle reflector 1 is set by hanging down from the ceiling through this linear hoisting mechanism.

[0035] The above-disclosed embodiments are merely preferred embodiments of the present utility model and should not be construed as limiting the scope of the present utility model. Therefore, any equivalent variations made in accordance with the claims of the present utility model shall still fall within the scope of the present utility model.

Claims

1. A millimeter-wave radar directional radiation testing system, characterized in that: The system includes at least one set of dark boxes, angle reflectors, and radars deployed in the same room. The cooperative structure of each set of dark boxes, angle reflectors, and radars is as follows: a directional radiation hole is opened on one wall of the dark box; the angle reflector is located outside the dark box on the side where the directional radiation hole is opened, and the signal transmitting and receiving surface of the angle reflector faces the directional radiation hole; the radar is located inside the dark box; the signal transmitting and receiving surface of the angle reflector and the plane where the directional radiation hole is located are parallel to each other; the center of the radar antenna, the center of the directional radiation hole, and the center of the angle reflector are located on the same straight line; a cone-shaped clearance space is provided from the center of the radar antenna towards the direction of the angle reflector, passing through the directional radiation hole.

2. The millimeter-wave radar directional radiation testing system according to claim 1, characterized in that: The directional radiation hole is opened in the side wall of the dark box, the radar is set inside the dark box in a side-illuminating manner, and the corner reflector is set in a bottom-supported manner facing to the side; or, the directional radiation hole is opened in the top wall of the dark box, the radar is set inside the dark box in an upward-illuminating manner, and the corner reflector is set in a downward-hanging manner.

3. The millimeter-wave radar directional radiation testing system according to claim 1, characterized in that: It also includes a corner reflector fixing device, which is disposed on the outside of the dark box on the side where the directional radiation hole is opened; the corner reflector is disposed on the corner reflector fixing device.

4. The millimeter-wave radar directional radiation testing system according to claim 1, characterized in that: It also includes a test bracket, which is set inside the dark box; the radar is set on the test bracket in a multi-dimensionally adjustable orientation.

5. The millimeter-wave radar directional radiation testing system according to claim 4, characterized in that: It also includes a radar fixture, through which the radar is fixedly mounted on the test bracket.

6. The millimeter-wave radar directional radiation testing system according to claim 1, characterized in that: The distance D3 between the center of the radar antenna and the inner side wall of the dark box is ≥10λ; the distance D4 between the center of the angular reflector and the center of the radar antenna is ≥3δ; the diameter d of the directional radiation aperture is ≥10λ; the distance D1 between the center of the radar antenna and the inner side of the top wall of the dark box is ≥10λ; the directional radiation aperture is opened on one side wall of the dark box; the distance D2 between the center of the radar antenna and the inner side of the bottom wall of the dark box is ≥10λ; where λ is the carrier wavelength of the radar, and δ is the range resolution of the radar.

7. The millimeter-wave radar directional radiation testing system according to claim 6, characterized in that: The cone-shaped clearance space is a cone-shaped clearance space with the center of the radar antenna as the center, a radius of D5≥6δ, and passing through the directional radiation aperture.

8. The millimeter-wave radar directional radiation testing system according to claim 3, characterized in that: The corner fixing device is a fixing device made of non-metallic material or metal material wrapped with wave-absorbing material.

9. The millimeter-wave radar directional radiation testing system according to claim 5, characterized in that: The radar tooling fixture is made of non-metallic material.

10. The millimeter-wave radar directional radiation testing system according to claim 4, characterized in that: The test bracket is made of non-metallic material.

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