Millimeter wave radar radio frequency performance evaluation test device

Abstract

The utility model relates to the technical field of millimeter-wave radars, in particular to a millimeter-wave radar radio frequency performance evaluation testing device which comprises a box body, a tester is arranged on one side of the box body, the box body is further provided with a clamp used for fixing a millimeter-wave radar to be tested, and the clamp comprises a movable seat and a fixed panel. And the movable seat is arranged in the box body and can reciprocate along the length and / or width direction of the box body. According to the utility model, the clamp which can be moved out of / in the box body is arranged in the box body, so that radars can be fixed and sent into the box body for high and low temperature signal transmitting and receiving tests at a time, and the problem of same frequency interference between the radars can be reduced with the minimum cost; through the fixed panel which can be rapidly separated from the movable seat, a new to-be-tested radar can be rapidly replaced when the movable seat slides out of the box body.

Description

Technical Field

[0001] The utility model relates to the technical field of millimeter wave radars, and in particular to a millimeter wave radar radio frequency performance evaluation and testing device. Background Art

[0002] 4D imaging radar has the characteristics of long detection distance, high detection accuracy and high resolution, and has become one of the hot spots in autonomous driving sensor research. The performance under high and low temperature conditions plays a vital role in the overall performance of the radar. Therefore, how to effectively evaluate the high and low temperature performance of radar RF front-end devices is a problem that needs to be solved.

[0003] The prior art discloses an invention patent with a publication number of CN217181207U and a patent name of a radar high and low temperature aging tester. The invention patent specifically discloses a box body provided with a furnace cavity providing a high and low temperature environment. A plurality of drawer units are provided on the front side wall of the box body into the furnace cavity. The drawer units are pull-out arranged. A detachable fixture is provided in the inner cavity of the drawer unit. The fixture has at least one positioning structure for positioning the radar. An electrical connector electrically connected to the positioning structure is installed on the fixture.

[0004] The radar high and low temperature aging tester in the above scheme can perform high and low temperature tests on the radar in the same device, and the radar high and low temperature aging tester has the advantage of high compatibility.

[0005] However, in the actual test process, since it is necessary to test the performance of the radar in receiving spectrum under high and low temperature environments, although the above solution can test multiple radars at the same time, it is also necessary to set up multiple spectrum analyzers to test the radar signal reception and transmission. In the compact temperature box structure design, it is also difficult to eliminate the interference of signals between radars, which will cause large errors in the experimental data. Utility Model Content

[0006] Technical issues solved

[0007] In view of the above-mentioned shortcomings of the prior art, the utility model provides a millimeter-wave radar radio frequency performance evaluation test device, which can solve the problem in the prior art that signal interference may cause test data errors during high and low temperature testing of the radar.

[0008] Technical Solution

[0009] In order to achieve the above objectives, the present invention is implemented through the following technical solutions:

[0010] The utility model provides a millimeter-wave radar radio frequency performance evaluation test device, comprising a box body, a tester is arranged on one side of the box body, and the box body is also provided with a fixture for fixing the millimeter-wave radar to be tested, the fixture comprises a movable seat and a fixed panel, the movable seat is arranged in the box body and can reciprocate along the length and / or width direction of the box body; the fixed panel can slide along the longitudinal axis direction of the movable seat, and a fixing hole corresponding to the screw hole on the millimeter-wave radar to be tested is opened on the end surface of the fixed panel on one side facing the tester; wherein, an elastically retractable card block is respectively provided on both sides of the fixed panel, and a plurality of card holes matching with the card block are opened on the movable seat along its height direction.

[0011] Furthermore, the tester is a spectrum analyzer.

[0012] Furthermore, the box body is provided with a bottom plate which can reciprocate along the length direction of the box body, and the movable seat is arranged on the bottom plate.

[0013] Furthermore, a slide rail is laid on the upper end of the bottom plate along the width direction of the box body, and the movable seat is guided to slide on the slide rail.

[0014] Furthermore, the movable seat includes two vertical plates perpendicular to the fixed panel, and a plurality of clamping holes are arranged on the two vertical plates. The clamping holes on each vertical plate are arranged at equal intervals along the height direction of the movable seat.

[0015] Furthermore, two shifting blocks which can be elastically moved along the length direction of the fixed panel are arranged on the end surface of one side away from the tester, and the two clamping blocks are respectively fixed on the shifting blocks.

[0016] Furthermore, the fixing holes are provided in plurality, and the plurality of fixing holes are arranged in a matrix.

[0017] Furthermore, a first scale mark is provided on the bottom plate.

[0018] Furthermore, the box body is provided with a second scale mark, and the second scale mark is arranged along the moving direction of the bottom plate.

[0019] Furthermore, a wave-absorbing material is disposed in the box, and the wave-absorbing material is disposed between the movable seat and the tester.

[0020] Beneficial Effects

[0021] Compared with the known public technology, the technical solution provided by the utility model has the following beneficial effects:

[0022] The utility model provides a fixture that can be moved out of / into the box body, so that the radar can be fixed and sent into the box body for high and low temperature signal transmission and reception testing at a single time, thereby reducing the problem of co-frequency interference between radars at the minimum cost;

[0023] By using a fixed panel that can be quickly detached from the movable seat, a new radar to be tested can be quickly replaced when the movable seat slides out of the box;

[0024] The elastically movable card block can quickly realize the disassembly and assembly between the radar and the fixed panel, further improving the radar test efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the prior art descriptions are briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model, and for ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0026] Figure 1 It is a schematic diagram of a partial cross-sectional structure of the overall structure of the box body in the embodiment of the utility model;

[0027] Figure 2 This is a schematic diagram of the front view structure of the box body in the embodiment of the utility model;

[0028] Figure 3 This is a schematic diagram of the rear structure of the clamp in the embodiment of the utility model;

[0029] Figure 4 This is a schematic diagram of the decomposition of the clamp structure in the embodiment of the utility model;

[0030] Figure 5 This is a schematic diagram of a radar in an embodiment of the utility model in a state of waiting for testing;

[0031] Figure 6 This is a schematic diagram of a radar in an embodiment of the utility model in a testing state;

[0032] Figure 7 It is a schematic diagram of the assembly state of the fixed panel in the embodiment of the utility model.

[0033] The numbers in the figure represent: 1. Box body; 10. Tester; 101. Mixing probe; 11. Bottom plate; 111. First scale mark; 12. Second scale mark; 13. Absorbing material; 14. Transparent material; 2. Clamp; 21. Movable seat; 211. Card hole; 22. Fixed panel; 221. Fixed hole; 222. Card block; 223. Dial block. DETAILED DESCRIPTION

[0034] The present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It is to be understood that the specific embodiments described herein are only used to explain the present invention, rather than to limit the present invention. It should also be noted that, for ease of description, only the parts related to the present invention, rather than all structures, are shown in the accompanying drawings.

[0035] In the description of the present invention, unless otherwise clearly specified and limited, the terms "connected", "connected", and "fixed" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0036] In the present utility model, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0037] In the description of this embodiment, the terms "upper", "lower", "left", "right", etc., and the orientation or position relationship are based on the orientation or position relationship shown in the drawings, and are only for the convenience of description and simplified operation, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore cannot be understood as a limitation of the present invention. In addition, the terms "first" and "second" are only used to distinguish in the description and have no special meaning.

[0038] The utility model is further described below in conjunction with embodiments.

[0039] Example:

[0040] There are several methods for high and low temperature testing of millimeter wave radar in the existing technology. The first method usually uses a waveguide structure to connect the MM IC RF port through a microstrip to waveguide method, but it requires the development of a new experimental version, and the 77GHz millimeter wave band has a short wavelength, which requires high processing requirements for the waveguide size. New errors may be introduced. The second method uses a step-type temperature chamber to place millimeter wave radars in batches in the temperature chamber, but this method not only requires the interior of the temperature chamber to be modified, but also easily causes the problem of co-frequency interference, so the overall cost is high and the test accuracy is not accurate enough.

[0041] Based on this, refer to the attached Figure 1-7 As shown, this scheme proposes a millimeter wave radar radio frequency performance evaluation test device, which mainly includes a box 1, a tester 10 is arranged on one side of the box 1, the high and low temperature box 1 is used to provide the ambient temperature for the radar to work, and a wave-transparent material 14 is arranged on one side wall of the box. The wave-transparent material 14 used in this case is PBT+30GF, and the material size is 300*300*5mm. The wave-transparent material 14 is fixed to one side of the box 1 by screws.

[0042] In practice, the influence of the wave-transparent material 14 needs to be calibrated. The upper computer software can be used to control the radar to transmit a single-frequency signal, and the radar signal is received by the tester 10. The radar signal size is tested with and without the wave-transparent material 14, and the difference between the two is the insertion loss of the wave-transparent material 14.

[0043] For example, when testing 5mm, the insertion loss of PBT+30GF material is 0.5dB. When using the tester 10 to test the radar transmission power, it is necessary to compensate for this 0.5dB insertion loss value. The specific details are well-known technologies and will not be described in detail here.

[0044] A wave absorbing material 13 is also disposed in the box body 1 , and the wave absorbing material 13 is disposed between the movable seat 21 and the tester 10 .

[0045] The box 1 is also provided with a fixture 2 for fixing the millimeter-wave radar to be tested. The fixture 2 includes a movable seat 21 and a fixed panel 22. The movable seat 21 is arranged in the box 1 and can reciprocate along the length and / or width direction of the box 1.

[0046] Specifically, the box body 1 in this case is provided with a bottom plate 11 which can reciprocate along the length direction of the box body 1, the movable seat 21 is arranged on the bottom plate 11, and the fixed panel 22 is guided to slide on the movable seat 21 and can slide along the longitudinal axis direction of the movable seat 21.

[0047] Furthermore, a slide rail is laid on the upper end of the bottom plate 11 along the width direction of the box body 1, and the movable seat 21 is guided to slide on the slide rail.

[0048] The fixed panel 22 and the movable seat 21 can be quickly disassembled and separated, and can be reloaded after a single millimeter-wave radar test, thereby speeding up the efficiency of the radar entering the box 1 for high and low temperature testing.

[0049] Specifically, in this solution, a fixing hole 221 corresponding to the screw hole on the millimeter-wave radar to be tested is provided on the end surface of the fixing panel 22 facing the tester 10. Usually, screw holes are provided on all sides of the millimeter-wave radar, so that the millimeter-wave radar can be fixed to the fixing panel 22 by screws. In this case, in order to adapt to millimeter-wave radars of different sizes, a plurality of fixing holes 221 are provided on the end surface of the fixing panel 22, and the plurality of fixing holes 221 are arranged in a matrix.

[0050] In actual test operations, when the current millimeter-wave radar is performing a test operation, another fixed panel 22 and the radar to be tested can be fixed, so that after the previous radar is tested, the fixed panel 22 fixed on the movable seat 21 can be quickly removed and a new fixed panel 22 can be installed on the movable seat 21, and then the movable seat 21 can be moved back to the test position in the box 1.

[0051] To ensure that the front and rear test positions of the radar in the box 1 are the same, in this case, a first scale mark 111 is provided on the bottom plate 11 to ensure that the front and rear positions of the movable seat 21 in the width direction of the box 1 remain consistent.

[0052] A second scale mark 12 is provided on the box body 1 , and the second scale mark 12 is arranged along the moving direction of the bottom plate 11 to ensure that the position of the movable seat 21 in the length direction of the box body 1 remains consistent front to back.

[0053] Furthermore, an elastically retractable clamping block 222 is respectively provided on both sides of the fixed panel 22, and a plurality of clamping holes 211 cooperating with the clamping block 222 are opened on the movable seat 21 along its height direction. The elastic activity mode of the clamping block 222 is not specifically limited.

[0054] In the present case, the two clamping blocks 222 are symmetrically arranged, and two shifting blocks 223 which can elastically move along the length direction of the fixed panel 22 are provided on the end face of the fixed panel 22 away from the tester 10. The two clamping blocks 222 are respectively fixed on the shifting blocks 223, and a sliding groove for the sliding of the shifting blocks 223 is provided on the fixed panel 22, and a spring is provided between the end of each shifting block 223 away from each other and the sliding groove.

[0055] Specifically, the movable seat 21 includes two vertical plates perpendicular to the fixed panel 22, and a plurality of clamping holes 221 are arranged on the two vertical plates. The clamping holes 221 on each vertical plate are arranged at equal intervals along the height direction of the movable seat 21, and the fixed panel 22 is arranged between the two vertical plates, and the clamping holes 221 on the vertical plates are used to cooperate and fix with the clamping blocks 222 on both sides of the fixed panel 22.

[0056] In this case, the tester 10 can be a spectrum analyzer, which is used to test the radar single-tone signal phase noise, radar transmission power and chirp signal. The test radar can be controlled by the host computer software to send a single-tone signal. The transmitted signal passes through the wave-transparent material 14, passes through the shielding device, and reaches the receiving end of the tester 10. The radar phase noise and transmission power can be tested through the spectrum analyzer.

[0057] The tester 10 can also be a target simulator, used to test and simulate target signals with different RCS, different positions, and different speeds, and to test the radar receiving spectrum performance. The host computer software can be used to control the test radar to send a frequency modulated continuous wave signal, turn on the target simulator device, set the simulated target distance R = 50m, RCS = 30dBsm, V = 2m / s, and when the tester 10 receives the radar signal, it processes the data and then returns it to the radar through the transmitting antenna. After the radar receives the signal, it transmits it to the host computer software for processing, and the host computer software parses the reflected target signal, distance, RCS and speed information. Compare with the set value to confirm whether the radar performance meets the requirements.

[0058] The end of the tester 10 facing the radar to be tested is a mixing probe 101. When in use, it is necessary to ensure that the center plane of the radar to be tested is aligned with the center position of the front end of the mixing probe 101 and is located at the center of the wave-transparent material 14. Combined with the temperature-controllable box 1, the radar performance at different temperatures can be tested.

[0059] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some of the technical features therein by equivalents. These modifications or replacements will not cause the essence of the corresponding technical solutions to deviate from the protection scope of the technical solutions of the embodiments of the present invention.

Claims

1. A millimeter wave radar radio frequency performance evaluation test device, comprising a box (1), a tester (10) is arranged on one side of the box (1), characterized in that: The box (1) is also provided with a fixture (2) for fixing the millimeter-wave radar to be tested, and the fixture (2) comprises: A movable seat (21), wherein the movable seat (21) is arranged in the box body (1) and can reciprocate along the length and / or width direction of the box body (1); A fixed panel (22), the fixed panel (22) being slidable along the longitudinal axis direction of the movable seat (21), and having a fixing hole (221) corresponding to the screw hole on the millimeter wave radar to be tested, on an end surface of the fixed panel (22) facing the tester (10); Wherein, an elastically retractable clamping block (222) is respectively provided on both sides of the fixed panel (22), and a plurality of clamping holes (211) matching with the clamping block (222) are provided on the movable seat (21) along its height direction.

2. A millimeter wave radar radio frequency performance evaluation test device according to claim 1, characterized in that: The tester (10) is a spectrum analyzer.

3. A millimeter wave radar radio frequency performance evaluation test device according to claim 2, characterized in that: The box body (1) is provided with a bottom plate (11) which can reciprocate along the length direction of the box body (1), and the movable seat (21) is arranged on the bottom plate (11).

4. A millimeter wave radar radio frequency performance evaluation test device according to claim 3, characterized in that: The upper end of the bottom plate (11) is provided with a slide rail along the width direction of the box body (1), and the movable seat (21) is guided and slid on the slide rail.

5. A millimeter wave radar radio frequency performance evaluation test device according to claim 4, characterized in that: The movable seat (21) comprises two vertical plates perpendicular to the fixed panel (22), and a plurality of clamping holes (211) are arranged on the two vertical plates. The clamping holes (211) on each vertical plate are arranged at equal intervals along the height direction of the movable seat (21).

6. A millimeter wave radar radio frequency performance evaluation test device according to claim 5, characterized in that: Two shifting blocks (223) that can be elastically moved along the length direction of the fixed panel (22) are provided on the end surface of one side of the fixed panel (22) away from the tester (10), and the two clamping blocks (222) are respectively fixed on the shifting blocks (223).

7. A millimeter wave radar radio frequency performance evaluation test device according to claim 6, characterized in that: A plurality of the fixing holes (221) are provided, and the plurality of fixing holes (221) are arranged in a matrix.

8. A millimeter wave radar radio frequency performance evaluation test device according to claim 7, characterized in that: The bottom plate (11) is provided with a first scale mark (111).

9. A millimeter wave radar radio frequency performance evaluation test device according to claim 8, characterized in that: The box body (1) is provided with a second scale mark (12), and the second scale mark (12) is arranged along the moving direction of the bottom plate (11).

10. A millimeter wave radar radio frequency performance evaluation test device according to any one of claims 1 to 9, characterized in that: A wave absorbing material (13) is also provided in the box body (1), and the wave absorbing material (13) is provided between the movable seat (21) and the tester (10).

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