Radar test system
Through the design of suspended angle reflector, the problem of millimeter-wave radar's angle measurement accuracy in dense production lines is solved, and efficient and low-cost radar testing is achieved, which is suitable for automotive electronic production lines and industrial radar assembly lines.
Patent Information
- Application Number
- CN202521195474.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-06-12
- Publication Date
- 2025-07-18
- Estimated Expiration
- 2035-06-12
AI Technical Summary
In the prior art, the angle measurement accuracy of millimeter-wave radar in the fields of industrial detection and autonomous driving is affected by environmental clutter interference, and the traditional methods cover a large area and are costly, making it difficult to deploy in dense production lines.
A radar testing system is designed to suspend the angle reflector vertically in the air through a suspension connection device. The radar to be tested is fixed on the operating table. The radiation plane is parallel to the opening plane of the angle reflector, forming a clearance area, reducing clutter interference, and avoiding setting clearance areas and dark rooms on the ground.
It realizes radar testing without occupying ground space, reduces production costs, improves testing efficiency, and is suitable for intensive production line environments.
Smart Images
Figure CN223123224U_ABST
Abstract
Description
Technical Field
[0001] This application relates to the field of radar technology, and particularly to a radar test system. Background Art
[0002] At present, millimeter-wave radars are widely used in fields such as industrial inspection and autonomous driving, and their angle measurement accuracy directly affects the system performance. To ensure the accuracy of radar angle measurement, it is necessary to regularly perform angle calibration through the echo signal of a corner reflector. However, environmental clutter interference during the calibration process has become a core technical difficulty.
[0003] In the prior art, clutter interference is generally suppressed by building an anechoic chamber or setting up a ground clearance area. However, constructing a closed environment with electromagnetic wave absorbing materials has a high construction cost, and the method of setting up a ground clearance area occupies a large area and is difficult to deploy in a dense production line. Therefore, there is an urgent need for an efficient and low-cost calibration solution suitable for factory environments, which can avoid clutter interference while breaking through the ground space limitation. Summary of the Utility Model
[0004] In view of this, this application provides a radar test system, which can perform radar tests without setting up a clearance area on the ground and an anechoic chamber, reducing the floor area and facilitating layout, while improving the test efficiency and reducing the production cost.
[0005] This application provides a radar test system, which includes an operating table, a fixture, and a radar under test, and also includes a corner reflector and a suspension connection device. The corner reflector is vertically suspended in the air through the suspension connection device, the radar under test is fixed on the operating table through the fixture, the radiation plane of the radar under test is parallel to the opening plane of the corner reflector, and the center point of the corner reflector, the suspension point of the suspension connection device, and the center point of the radar under test are collinear.
[0006] In some embodiments, the distance between the suspension point of the suspension connection device and the center point of the corner reflector is a first distance, and the distance between the center point of the radar under test and the center point of the corner reflector is a second distance, and the first distance is greater than the second distance.
[0007] In some embodiments, the suspension connection device is fixed to the ceiling.
[0008] In some embodiments, the operating table further includes a bracket, and the bracket includes a support portion perpendicular to the plane of the operating table and an extension portion parallel to the plane of the operating table, and the suspension connection device is fixed to the extension portion.
[0009] In some embodiments, a slide rail and a locking structure are provided on the surface of the operating table. One end of the fixture is arranged in the slide rail, and the other end fixes the radar under test. The slide rail is used to adjust the position of the fixture and fix it through the locking structure.
[0010] In some embodiments, the corner reflector includes a first reflector, a second reflector, and a third reflector that are perpendicular to each other. The materials of the first reflector, the second reflector, and the third reflector are metal. The shape of the corner reflector includes a cone or a cube with at least one open surface.
[0011] In some embodiments, a hemispherical space with a radius of a second distance centered on the center point of the corner reflector is kept clear. The hemispherical space extends in the direction of the radar under test, and there are no metal objects and moving interference objects in the clear area.
[0012] In some embodiments, a cylindrical space with a radius of a second distance and a height of a first distance centered on the axis center of the corner reflector is kept clear, and there are no metal objects and moving interference objects in the clear area.
[0013] In some embodiments, the suspension connection device is integrated with a length adjustment mechanism for controlling the suspension height of the corner reflector. The material of the suspension connection device is nylon wire or high molecular polymer fiber.
[0014] In some embodiments, the fixture is an adjustable non-metallic fixture and includes a positioning structure. The positioning structure is used to fix the radar under test and ensure that the radiation plane of the radar under test is parallel to the open plane of the corner reflector.
[0015] The present application provides a radar test system, including a corner reflector, a suspension connection device, an operating table, a fixture, and a radar under test. The corner reflector is vertically suspended in the air through the suspension connection device. The radar under test is fixed on the operating table through the fixture. The radiation plane of the radar under test is parallel to the open plane of the corner reflector. The center point of the corner reflector, the suspension point of the suspension connection device, and the center point of the radar under test are collinear. In this embodiment, by suspending the corner reflector in the air to form a clear area, the clutter interference to the radar signal is reduced. Radar testing can be carried out without setting a clear area on the ground and setting up an anechoic chamber, reducing the floor area and facilitating the layout. While improving the test efficiency, the production cost can also be reduced. Description of the Drawings
[0016] To more clearly illustrate the technical solutions in the embodiments of the present application, the following will briefly introduce the accompanying drawings required for the description of the embodiments. Obviously, the accompanying drawings in the following description are only some embodiments of the present application. For those skilled in the art, without creative efforts, other accompanying drawings can be obtained based on these drawings.
[0017] Figure 1 It is a schematic structural diagram of a radar test system provided by the present application.
[0018] Figure 2 It is another schematic structural diagram of a radar test system provided by the present application.
[0019] Figure 3 It is a three-dimensional schematic structural diagram of a corner reflector provided by the present application. Detailed implementation manners
[0020] The following will clearly and completely describe the technical solutions in the embodiments of the present application in conjunction with the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present application, rather than all embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative efforts belong to the scope of protection of the present application. Without conflict, the following various embodiments and their technical features can be combined with each other.
[0021] In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include at least one of such features. In the description of the present application, the meaning of "a plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined. In the description of the present application, the meaning of "several" is at least one, such as one, two, etc., unless otherwise clearly and specifically defined.
[0022] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the technical field to which the present application belongs. The terms used herein are only for the purpose of describing specific implementation manners and are not intended to limit the present application. The term "and / or" used herein includes any and all combinations of one or more of the related listed items. The terms "connection", "electrical connection", and "fixation" used herein include any direct and indirect electrical or structural connection means. Therefore, if it is described in the text that the first device is fixed / connected / electrically connected to the second device, it means that the first device can be directly electrically / structurally connected to the second device, or indirectly electrically / structurally connected to the second device through other devices or connection means.
[0023] The present application provides a radar test system, including a corner reflector, a suspension connection device, an operating table, a fixture, and a radar under test. The corner reflector is vertically suspended in the air through the suspension connection device, the radar under test is fixed on the operating table through the fixture, the radiation plane of the radar under test is parallel to the opening plane of the corner reflector, and the center point of the corner reflector, the suspension point of the suspension connection device, and the center point of the radar under test are collinear.
[0024] Please refer to Figure 1 , Figure 1 FIG. is a schematic structural diagram of a radar test system provided by the present application. The radar test system in the present application includes a corner reflector 11, a suspension connection device 12, an operating table 13, a fixture 14, and a radar under test 15. The corner reflector 11 is vertically suspended in the air through the suspension connection device 12, the radar under test 15 is fixed on the operating table 13 through the fixture 14, the radiation plane of the radar under test 15 is parallel to the opening plane of the corner reflector 11, and the center point of the corner reflector 11, the suspension point of the suspension connection device 12, and the center point of the radar under test 15 are collinear. Among them, the radiation plane of the radar under test 15 is the front side where the radar emits or receives signals, and is completely parallel to the opening plane of the corner reflector 11, which can ensure the accuracy of the signal reflection path. This solution is different from the traditional solution of placing the corner reflector on the ground. The suspension design utilizes the vertical idle space of the factory production line and does not need to occupy the ground area, especially suitable for intensive production line environments (such as automotive electronics production lines, industrial radar assembly lines, etc.).
[0025] In an embodiment, please continue to refer to Figure 1 , the distance between the suspension point of the suspension connection device 12 and the center point of the corner reflector 11 is the first distance D1, and the distance between the center point of the radar under test 15 and the center point of the corner reflector 11 is the second distance D2. The first distance is greater than the second distance. For example: if the second distance D2 = 2 meters, then the first distance D1 needs to satisfy D1 ≥ 2 meters to ensure that there is enough clearance space above the corner reflector 11 to avoid interference to the millimeter wave signal caused by the ceiling structure or the suspension device. If the first distance D1 is less than the second distance D2, the radius of the cylindrical clearance area above the corner reflector may exceed the height range of D1, resulting in unisolated reflection sources near the ceiling. At the same time, a larger first distance D1 can make the corner reflector 11 hang higher, reducing the interference of ground personnel and equipment to the signal path.
[0026] In one embodiment, the suspension connection device 12 can be fixed to the ceiling or top structural member of the factory production line, and the top structural member can include steel beams, load-bearing brackets, etc. The suspension connection device 12 can be rigidly fixed to avoid the wobbling of the corner reflector during the test, which may affect the radar angle measurement accuracy. In addition, it is necessary to ensure that the center point of the corner reflector 11, the suspension point of the suspension connection device 12, and the center point of the radar under test 15 are collinear. During installation, the geometric alignment of the three points can be ensured by means of laser calibration, etc.
[0027] In one embodiment, please refer to Figure 2 , the operating table 13 can further include a bracket, which is composed of a supporting portion 131 perpendicular to the plane of the operating table and an extending portion 132 parallel to the plane of the operating table. The suspension connection device 12 can be fixed to the extending portion 132. In this embodiment, the extending portion 132 provides an installation position for the suspension connection device 12, and the suspension connection device 12 is connected to the corner reflector 11 downward from the extending portion 132, thereby realizing the suspended setting of the corner reflector 11. This structure enables the corner reflector 11 to be suspended at a suitable position above the operating table 13, reasonably utilizing the space above the operating table 13, making the layout of the test system more convenient and facilitating the adjustment of the position of the corner reflector 11. Moreover, the supporting portion 131 and the extending portion 132 of the bracket cooperate with each other to provide stable support for the suspension connection device 12, ensuring the stable position of the corner reflector 11 during the test.
[0028] In one embodiment, a slide rail 133 and a locking structure are provided on the surface of the operating table 13. One end of the fixture 14 is arranged in the slide rail 133, and the other end is fixed to the radar under test 15. The slide rail 133 is used to adjust the position of the fixture 14 and fix it through the locking structure. Specifically, the slide rail 133 provided on the surface of the operating table 13 can be a track, allowing the fixture 14 to slide thereon. The locking structure is similar to the "brake" on the track. When the fixture 14 slides to the appropriate position, it can firmly fix it to prevent displacement during the test. One end of the fixture 14 is embedded in the slide rail 133 and can move in the direction defined by the slide rail; the other end firmly fixes the radar under test 15 to ensure the stable posture of the radar during the test. In actual use, according to the test requirements, such as when changing the relative distance or angle between the radar under test 15 and the corner reflector 11, the locking structure is loosened, and the fixture 14 is pushed to slide on the slide rail 133 to move the radar under test 15 to the target position. When the radar under test 15 reaches the target position, the locking structure can be operated to firmly clamp the fixture 14, so that the fixture and the radar under test stay stably at this position, providing a stable hardware foundation for accurate testing. The above-mentioned slide rail 133 can conveniently adjust the position of the radar under test 15 to adapt to different test scenarios and parameter requirements, increasing the versatility of the test system.
[0029] In one embodiment, please continue to refer to Figure 3, the corner reflector 11 includes a first reflector 111, a second reflector 112, and a third reflector 113 that are perpendicular to each other. The first reflector 111 extends along the x-z plane, the second reflector 112 extends along the y-z plane, and the third reflector 113 extends along the x-y plane. The three intersect at the edges and jointly enclose a corner reflection structure with a three-dimensional spatial form. The materials of the first reflector 111, the second reflector 112, and the third reflector 113 are all metal. The shape of the corner reflector 11 includes a cone or a cube with at least one open face. Specifically, this vertical structure can reflect the incident radar wave back along the original direction. The principle is based on the law of reflection of light. When the radar wave is reflected successively on the mutually perpendicular plates, the final reflected wave is parallel to the incident wave. For example Figure 3 the corner reflector 11 in
[0030] is in the shape of a cone, and this shape can effectively receive and reflect radar waves from different angles in space. The open face is to allow the radar wave to enter the interior of the corner reflector 11 to achieve multiple reflections, thereby enhancing the intensity of the reflected signal. The first reflector 111, the second reflector 112, and the third reflector 113 are made of metal because metal has good reflection performance for radar waves. The metal surface can efficiently reflect radar waves, reduce signal absorption and scattering losses, ensure that the reflected signal is strong enough, so that the radar under test can clearly receive the echo signal, which is convenient for testing and data acquisition.
[0031] In one embodiment, a cylindrical space with the center point of the corner reflector 11 as the axis center, a radius of the second distance, and a height of the first distance is kept clear, and there are no metal objects and moving interfering objects in the clear area. This area mainly avoids interference to the signal caused by objects above and around the corner reflector 11. For example, it prevents metal objects such as the ceiling and structural members near the suspension connection device 12 from reflecting radar signals, or avoids moving objects above (such as other equipment components in the production line) interfering with signal propagation, ensuring the purity and stability of the signals reflected by the corner reflector 11, and thus ensuring the accuracy of radar testing.
[0032] In one embodiment, the suspension connection device 12 can be integrated with a length adjustment mechanism for controlling the suspension height of the corner reflector 11, and the material of the suspension connection device 12 is nylon thread or high molecular polymer fiber. Specifically, the length adjustment mechanism integrated in the suspension connection device 12 can change its own length as needed, and thus flexibly control the suspension height of the corner reflector 11. In radar testing, under different test scenarios and parameter requirements, it may be necessary to adjust the vertical distance between the corner reflector 11 and the radar under test 15. For example, when testing radars of different types and different performance indicators, by adjusting the suspension height of the corner reflector 11, the signal propagation path and reflection angle between the two can be changed, etc., to obtain more comprehensive and accurate test data. In addition, nylon thread or high molecular polymer fiber has the characteristics of good flexibility and light weight, which is convenient for integrating the length adjustment mechanism and operating, and can easily achieve a change in the suspension length. At the same time, the additional load on the corner reflector is small, and it will not affect the suspension stability of the corner reflector due to its own weight. And nylon or high molecular polymer fiber belongs to non-metallic materials, with extremely small reflection and absorption of radar waves, and will not interfere with the radar test signal, ensuring the accuracy of the test results.
[0033] In one embodiment, the fixture 14 is an adjustable non-metallic fixture, which includes a positioning structure for fixing the radar under test 15 and ensuring that the radiation plane of the radar under test 15 is parallel to the opening plane of the corner reflector 11. In radar testing, the sizes and shapes of different models of radars under test 15 may vary. The adjustable feature enables the fixture 14 to adapt to a variety of radars, and it can firmly hold different specifications of radars through adjustment to meet diverse testing requirements. The use of non-metallic materials is mainly to avoid interfering with radar signals. Metals will strongly reflect radar waves, affecting the accuracy of test results. Non-metallic materials (such as engineering plastics, nylon, etc.) have extremely low reflection and absorption of radar waves, allowing radar signals to be normally transmitted and received, ensuring the authenticity and reliability of test data. The positioning structure can accurately determine the position of the radar under test 15 in the fixture 14. Specifically, the radar under test 15 can be firmly fixed through specific card slots, clamping jaws, magnetic absorption, etc., preventing the displacement of the radar under test 15 due to factors such as vibration and collision during the test, which may affect the test results. In addition, while fixing the radar under test 15, the positioning structure can also calibrate the attitude. For example, it can use auxiliary calibration devices (such as a level, an angle sensor, etc.) to ensure that the radiation plane of the radar under test 15 is parallel to the opening plane of the corner reflector 11. Only when the two are parallel can the signal emitted by the radar under test 15 reach the corner reflector 11 along an ideal path and be effectively reflected back to the radar under test 15, enabling the radar under test 15 to receive accurate reflected signals, thereby achieving accurate testing of radar performance.
[0034] The radar testing system provided by the embodiment of the present application includes a corner reflector, a suspension connection device, an operation console, a fixture, and a radar under test. The corner reflector is vertically suspended in the air through the suspension connection device, the radar under test is fixed on the operation console through the fixture, the radiation plane of the radar under test is parallel to the opening plane of the corner reflector, and the center point of the corner reflector, the suspension point of the suspension connection device, and the center point of the radar under test are collinear. In this embodiment, by suspending the corner reflector in the air to form a clear space area, the clutter interference to radar signals is reduced, and radar testing can be carried out without setting a clear space area on the ground and without setting up an anechoic chamber, reducing the floor area and facilitating layout. While improving the testing efficiency, the production cost can also be reduced.
[0035] The above are only the embodiments of the present application, and do not limit the patent scope of the present application accordingly. Any equivalent structure or equivalent process transformation made using the content of the specification and drawings of the present application, such as the mutual combination of technical features between various embodiments, or direct or indirect application in other related technical fields, shall be equally included in the patent protection scope of the present application.
Claims
1. A radar test system, comprising an operating console, a fixture, and a radar to be tested, characterized in that It also includes a corner reflector and a suspension connection device. The corner reflector is vertically suspended in the air through the suspension connection device. The radar under test is fixed on the operating table through the fixture. The radiation plane of the radar under test is parallel to the opening plane of the corner reflector. The center point of the corner reflector, the suspension point of the suspension connection device, and the center point of the radar under test are collinear.
2. The radar test system according to claim 1, wherein The distance between the suspension point of the suspension connection device and the center point of the corner reflector is the first distance, and the distance between the center point of the radar under test and the center point of the corner reflector is the second distance. The first distance is greater than the second distance.
3. The radar test system according to claim 1, wherein, The suspension connection device is fixed on the ceiling.
4. The radar test system according to claim 1, wherein The operating table further includes a bracket, and the bracket includes a support portion perpendicular to the plane of the operating table and an extension portion parallel to the plane of the operating table. The suspension connection device is fixed on the extension portion.
5. The radar test system according to claim 1, wherein Sliding rails and locking structures are provided on the surface of the operating table. One end of the fixture is arranged in the sliding rails, and the other end fixes the radar under test. The sliding rails are used to adjust the position of the fixture and fix it through the locking structure.
6. The radar test system according to claim 1, characterized in that, The corner reflector includes a first reflector, a second reflector, and a third reflector that are perpendicular to each other. The materials of the first reflector, the second reflector, and the third reflector are metals. The shape of the corner reflector includes a cone or a cube with at least one opening surface.
7. The radar test system according to claim 2, wherein A hemispherical space with a radius of the second distance centered on the center point of the corner reflector is kept clear. The hemispherical space extends in the direction of the radar under test, and there are no metal objects and moving interference objects in the clear area.
8. The radar test system according to claim 2, characterized in that, A cylindrical space with a radius of the second distance and a height of the first distance centered on the center axis of the corner reflector is kept clear, and there are no metal objects and moving interference objects in the clear area.
9. The radar test system according to any one of claims 1-6, characterized in that, The suspension connection device is integrated with a length adjustment mechanism for controlling the suspension height of the corner reflector. The material of the suspension connection device is nylon thread or polymer fiber.
10. The radar test system according to any one of claims 1-6, characterized in that, The fixture is an adjustable non-metallic fixture and includes a positioning structure. The positioning structure is used to fix the radar under test and ensure that the radiation plane of the radar under test is parallel to the opening plane of the corner reflector.