Radar test system

Abstract

A radar testing system comprises a camera obscura, a target simulator, and a rotating mechanism, a linear driving mechanism and an angle reflection assembly which are installed in the camera obscura, the rotating mechanism is used for fixing a radar and driving the radar to move for radar testing, and the angle reflection assembly is connected to the linear driving mechanism. The linear driving mechanism is used for driving the angle reflecting assembly to move in the direction close to or away from the rotating mechanism so as to adapt to different types of radar tests, and the radio frequency part of the target simulator is arranged in the camera obscura. The radar test system is used for meeting test requirements of radars of various models, and resource waste is avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of radar testing, and particularly relates to a radar testing system. Background Art

[0002] In the initial stage of research and development, for the testing of millimeter-wave radars, a scientific and stable testing environment needs to be provided. Currently, for the testing of millimeter-wave radars in the research and development stage, the main testing methods are: a) outdoor site testing; b) outdoor public road testing; c) dark box & dark room testing. For methods a and b, there is a possibility that the noisy environment will affect the test results; for method c, it is difficult for many dark boxes to achieve compatibility with diverse radar tests. For example, it is difficult to achieve compatibility tests for common ordinary corner radars, 4D radars, and in-cabin radars. Content of the Utility Model

[0003] In view of this, the utility model provides a radar testing system to meet the testing requirements of various types of radars and avoid waste of resources.

[0004] A radar testing system includes a dark box, a target simulator, and a rotating mechanism, a linear driving mechanism, and a corner reflector assembly installed in the dark box. The rotating mechanism is used to fix the radar and drive the radar to move for radar testing. The corner reflector assembly is connected to the linear driving mechanism, and the linear driving mechanism is used to drive the corner reflector assembly to move towards or away from the rotating mechanism to adapt to different types of radar tests. The RF part of the target simulator is arranged in the dark box.

[0005] In an embodiment of the utility model, the above-mentioned rotating mechanism includes a horizontal driving part, a polarization driving part, and a clamping part for clamping the radar. The driving end of the horizontal driving part is connected to the polarization driving part, and the driving end of the polarization driving part is connected to the clamping part. The horizontal driving part is used to drive the polarization driving part and the clamping part to deflect in the horizontal plane for radar horizontal angle and vertical angle testing. The polarization driving part is used to drive the clamping part to rotate;

[0006] When conducting the radar test, after the polarization driving part drives the clamping part and the radar clamped by it to be polarized, the horizontal driving part drives the polarization driving part and the clamping part to deflect in the horizontal plane for the radar test.

[0007] In an embodiment of the utility model, the above-mentioned radar testing system further includes a point light source laser. The point light source laser is fixed on the clamping part during central alignment calibration. The laser point emitted by the point light source laser hits the corner reflection center of the corner reflector assembly or the center of the RF part, so that the center of the radar to be tested is aligned with the corner reflection center or the center of the RF part.

[0008] In an embodiment of the present utility model, the above-mentioned radar test system further includes a first horizontal wire bonder and a second horizontal wire bonder. The first horizontal wire bonder is arranged in the dark box and is used for calibrating the vertical direction between the corner reflector of the corner reflector assembly and the radar to be tested. The second horizontal wire bonder is arranged outside the dark box and is used for calibrating the pitching direction of the corner reflector of the corner reflector assembly.

[0009] In an embodiment of the present utility model, the above-mentioned linear drive mechanism includes a linear drive rail and a movable seat. The movable seat is movably connected to the linear drive rail, and the corner reflector assembly is mounted on the movable seat. The linear drive rail is used to drive the movable seat to move linearly.

[0010] In an embodiment of the present utility model, the above-mentioned corner reflector assembly includes a first base, a first corner reflector and a telescopic driver connected to the first base. The first base is connected to the movable seat, and the telescopic driver is connected to the first corner reflector. The telescopic driver is used to drive the first corner reflector to move telescopically in a direction close to or away from the rotary drive mechanism, so as to simulate the breathing action of a human.

[0011] In an embodiment of the present utility model, the above-mentioned corner reflector assembly further includes a second base and a second corner reflector connected to the second base. The second base is connected to the movable seat. The linear drive mechanism further includes a translation driver, and the translation driver is used to drive the first base and / or the second base to move closer to or away from each other, so as to test the angular resolution of the radar.

[0012] In an embodiment of the present utility model, the above-mentioned corner reflector assembly further includes a third corner reflector. The third corner reflector is connected to the second base. The second corner reflector and the third corner reflector are arranged vertically opposite to each other in the vertical direction. The protruding lengths of the second corner reflector and the third corner reflector facing the rotary mechanism are different. The second corner reflector and the third corner reflector cooperate to test the range resolution of the radar.

[0013] In an embodiment of the present utility model, the above-mentioned radar test system further includes a main acquisition line. At least part of the main acquisition line is arranged in the dark box, and at least two connectors are connected to the main acquisition line. Each connector is used to dock different models of the radar.

[0014] In an embodiment of the present utility model, the above-mentioned radar test system further includes a control system. The control system is electrically connected to the main acquisition line, and the control system obtains the signal of the radar to be tested through the main acquisition line.

[0015] In an embodiment of the present utility model, the above-mentioned dark box includes a plurality of body segments, and the plurality of body segments are sequentially spliced in the horizontal direction to form the dark box.

[0016] In an embodiment of the present utility model, the inner wall of the dark box is provided with domestic microwave absorbing cotton.

[0017] In an embodiment of the present utility model, at least one of the body segments is provided with an openable side door.

[0018] The radar test system of the present utility model drives the corner reflector assembly to move towards the direction close to the rotating mechanism through a linear drive mechanism, so as to meet the radar test requirements of various models, effectively avoid waste of resources, and greatly reduce the test cost. Moreover, the radar to be tested is arranged in the dark box, with low environmental noise and good test environment. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 is a top view structural schematic diagram of the interior of the dark box of the present application.

[0020] Figure 2 is a three-dimensional structural schematic diagram of the dark box of the present application.

[0021] Figure 3 is a structural schematic diagram of the radar test system of the present application.

[0022] Figure 4 is a side view structural schematic diagram of the interior of the dark box of the present application. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0023] The following specific embodiments illustrate the implementation manners of the present application. Those skilled in the art can easily understand other advantages and effects of the present application from the content disclosed in this specification.

[0024] In the following description, reference is made to the accompanying drawings, which describe several embodiments of the present application. It should be understood that other embodiments may also be used, and mechanical composition, structure, electrical, and operational changes may be made without departing from the spirit and scope of the present application. The following detailed description should not be considered restrictive. The terms used herein are only for describing specific embodiments and are not intended to limit the present application.

[0025] Although in some instances the terms first, second, etc. are used herein to describe various elements, these elements should not be limited by these terms. These terms are only used to distinguish one element from another.

[0026] Furthermore, as used herein, the singular forms "a", "an", and "the" are intended to also include the plural forms unless the context clearly dictates otherwise. It should be further understood that the terms "comprises" and "comprising" specify the presence of the stated features, steps, operations, elements, components, items, kinds, and / or groups, but do not preclude the presence, occurrence, or addition of one or more other features, steps, operations, elements, components, items, kinds, and / or groups. The terms "or" and "and / or" as used herein are to be construed as inclusive, meaning either or any combination. Thus, "A, B, or C" or "A, B, and / or C" means "any of the following: A; B; C; A and B; A and C; B and C; A, B, and C". Exceptions to this definition occur only when the combination of elements, functions, steps, or operations are mutually exclusive in some manner.

[0027] Figure 1 is a top view structural schematic diagram of the inside of the black box of this application, Figure 2 is a three-dimensional structural schematic diagram of the black box of this application, Figure 3 is a structural schematic diagram of the radar test system of this application, as Figure 1 、 Figure 2 and Figure 3 shown. The radar test system includes a black box 11, a target simulator 12, and a rotating mechanism 13, a linear drive mechanism 14, and a corner reflector assembly 15 installed inside the black box 11. The rotating mechanism 13 is used to fix the radar 20 and drive the radar 20 to move for radar 20 testing. The corner reflector assembly 15 is connected to the linear drive mechanism 14, and the linear drive mechanism 14 is used to drive the corner reflector assembly 15 to move in a direction closer to or farther from the rotating mechanism 13 to adapt to different types of radar 20 testing. The RF part 121 of the target simulator 12 is arranged in the black box 11.

[0028] When conducting radar 20 testing, the rotating mechanism 13 is used to fix the radar 20 to be tested, and the linear drive mechanism 14 controls the corner reflector assembly 15 to move in a direction closer to or farther from the rotating mechanism 13 to a suitable position so that the corner reflector assembly 15 can match the radar 20 to be tested. For example, the corner reflector assembly 15 is driven to move in a direction closer to the rotating mechanism 13 to a suitable position (the vertical distance between the two is less than 1 meter, and the minimum distance is 0.5 meter) to cover the ultra-short-range in-cabin radar 20, or the corner reflector assembly 15 is driven to move in a direction farther from the rotating mechanism 13 to a suitable position to cover the full-range testing of the 4D radar 20. Then, the rotating mechanism 13 drives the radar 20 to rotate by a set angle, such as ±70°, in the horizontal plane. During this process, the radar 20 emits electromagnetic waves, and the target simulator 12 receives the electromagnetic waves through the RF part 121 and emits corresponding electromagnetic waves according to the target to be simulated.

[0029] The radar test system of the present application drives the corner reflector assembly 15 to move towards the rotating mechanism 13 through the linear drive mechanism 14, so as to meet the test requirements of various models of radars 20, effectively avoid waste of resources, and greatly reduce the test cost. Moreover, the radar 20 to be tested is arranged in the dark box 11, with low environmental noise and good test environment.

[0030] Optionally, the target simulator 12 uses a 5G bandwidth and supports radar 20 frequency bands of 60 GHz and 77 GHz, and can be used for in-cabin radar 20 testing, ordinary front radar 20 and corner radar 20 testing, and 4D radar 20 testing.

[0031] Optionally, a first direction X and a second direction Y perpendicular to each other in the horizontal plane are defined, and a third direction Z along the vertical direction is defined. The third direction Z is perpendicular to the first direction X and the second direction. In this embodiment, the length direction of the dark box 11 is parallel to the first direction X, the width direction of the dark box 11 is parallel to the second direction Y, and the height direction of the dark box 11 is parallel to the third direction Z; the linear drive mechanism 14 is used to drive the corner reflector assembly 15 to reciprocate along the first direction X.

[0032] Optionally, as Figure 1 shown, the rotating mechanism 13 includes a horizontal drive part 131, a polarization drive part 132, and a clamping part 133 for clamping the radar 20. The drive end of the horizontal drive part 131 is connected to the polarization drive part 132, and the drive end of the polarization drive part 132 is connected to the clamping part 133. The horizontal drive part 131 is used to drive the polarization drive part 132 and the clamping part 133 to deflect in the horizontal plane for radar 20 horizontal angle (azimuth) and vertical angle (elevation) testing. The polarization drive part 132 is used to drive the clamping part 133 to rotate for radar 20 field of view (FOV) testing;

[0033] When performing radar 20 field of view testing, after the polarization drive part 132 drives the clamping part 133 and the radar 20 clamped by it to be polarized, the horizontal drive part 131 drives the polarization drive part 132 and the clamping part 133 to deflect in the horizontal plane for radar 20 testing. In this embodiment, the horizontal drive part 131 drives the polarization drive part 132 and the clamping part 133 to deflect with the third direction Z as the axis to realize the deflection action of the radar 20 to be tested in the horizontal plane; the polarization drive part 132 drives the clamping part 133 to rotate with the first direction X as the axis to perform field of view (FOV) testing after polarizing the radar 20 to be tested.

[0034] It is worth mentioning that when the radar 20 to be tested is subjected to the field of view angle test (FOV) in this application, first, the polarization driving part 132 is controlled to drive the radar 20 to be tested to rotate ±90° (to complete the polarization action of the radar 20), and then the horizontal driving part 131 drives the polarization driving part 132 and the radar 20 to be tested on the clamping part 133 to deflect for testing. This test method takes into account that the FOV in both the azimuth (the first direction X or the second direction Y) and elevation (the third direction Z) of some radars 20 is relatively large. If the radar 20 is directly rotated around the elevation, the radar 20 will see the metal at the bottom of the dark box 11, resulting in misjudgment of the radar 20. Therefore, the test method of this application can effectively avoid the problem of misjudgment of the radar 20.

[0035] Optionally, the radar test system further includes a point light source laser (not shown in the figure). When performing the center alignment calibration, the point light source laser is fixed on the clamping part 133, and the laser point emitted by the point light source laser hits the corner cube center of the corner cube assembly 15 or the center of the RF part, so that the center of the radar 20 to be tested is aligned with the corner cube center or the center of the RF part.

[0036] Optionally, the radar test system further includes a first horizontal wire aligner (not shown in the figure) and a second horizontal wire aligner (not shown in the figure). The first horizontal wire aligner is arranged in the dark box 11 and is used for calibrating the vertical direction (the third direction Z) between the corner cube of the corner cube assembly 15 and the radar 20 to be tested. At this time, mainly observe the vertical light emitted by the first horizontal wire aligner, and adjust the corner cube to move left and right along the second direction Y or rotate along the third direction Z, which can ensure the position and angle of the corner cube in the third direction Z; the second horizontal wire aligner is arranged outside the dark box 11 and is used for calibrating the pitching direction of the corner cube of the corner cube assembly 15. In this embodiment, marks are designed on the dark box 11 and the linear drive mechanism 14. When adjusting the corner cube of the corner cube assembly 15, ensure that the marks on the dark box 11 and the linear drive mechanism 14 coincide with the corner cube surface to ensure that the pitching direction angle of the corner cube is calibrated to zero.

[0037] This application uses a point light source laser, a first horizontal wire aligner, and a second horizontal wire aligner to calibrate the radar 20 respectively and reduce the installation error.

[0038] Optionally, as Figure 1 shown, the linear drive mechanism 14 includes a linear drive guide rail 141 and a movable seat 142. The movable seat 142 is movably connected to the linear drive guide rail 141, and the corner cube assembly 15 is installed on the movable seat 142. The linear drive guide rail 141 is used to drive the movable seat 142 to move linearly. In this embodiment, the linear drive guide rail 141 is arranged along the first direction X, and its length is 5 meters, 6 meters, 7 meters, or 8 meters, which can be freely designed according to actual needs.

[0039] Optionally, as Figure 1 shown, the corner cube assembly 15 includes a first base 151, a first corner cube 152 and a telescopic driver 153 connected to the first base 151. The first base 151 is connected to the movable seat 142. The telescopic driver 153 is connected to the first corner cube 152. The telescopic driver 153 is configured to drive the first corner cube 152 to telescopically move in a direction close to or away from the rotating mechanism 13, so as to simulate the breathing motion of a human. The first corner cube 152 and the telescopic driver 153 of the present application cooperate to simulate the chest rising and falling frequency and amplitude of human breathing, and provide a scientific verification method for the radar 20 in the R & D period.

[0040] Optionally, the corner cube assembly 15 further includes a second base 154 and a second corner cube 155 connected to the second base 154. The second base 154 is connected to the movable seat 142. The linear drive mechanism 14 further includes a translation driver 143. The translation driver 143 is configured to drive the first base 151 and / or the second base 154 to move closer to or away from each other, so as to test the angular resolution of the radar 20. In this embodiment, the movable seat 142 is arranged along the second direction Y, and the translation driver 143 can drive the first base 151 and the second base 154 to move along the second direction Y.

[0041] Optionally, Figure 4 is a schematic side view structure diagram inside the dark box of the present application. As Figure 4 shown, the corner cube assembly 15 further includes a third corner cube 157. The third corner cube 157 is connected to the second base 154. The second corner cube 155 and the third corner cube 157 are arranged vertically opposite to each other. The protruding lengths of the second corner cube 155 and the third corner cube 157 towards the rotating mechanism 13 are different. The second corner cube 155 and the third corner cube 157 cooperate to test the range resolution of the radar 20. In this embodiment, the second base 154 is arranged along the third direction Z, the second corner cube 155 and the third corner cube 157 are arranged vertically opposite to each other along the third direction Z, and the protruding length of the second corner cube 155 towards the rotating mechanism 13 is greater than the protruding length of the third corner cube 157 towards the rotating mechanism 13.

[0042] Optionally, the radar test system further includes a collection main line 16. At least part of the collection main line 16 is arranged in the dark box 11. At least two connectors are connected to the collection main line 16, and each connector is used to dock different models of radars 20. In this embodiment, the collection main line 16 is formed by combining multiple wire harnesses corresponding to different models, and the wire harnesses are arranged in parallel with each other.

[0043] Optionally, as Figure 3 shown, the radar test system further includes a control system 17. The control system 17 is electrically connected to the collection main line 16. The control system 17 obtains the signals of the radar 20 to be tested through the collection main line 16.

[0044] Optionally, as Figure 3 shown, the control system 17 includes an industrial control computer 171, a USB hub 172, a switch 173, a programmable power supply 174, a CAN module 175, an RS485 module 176, a linear controller 177, and in-vehicle Ethernet 178, where:

[0045] For the industrial control computer 171 to implement data acquisition of the 200G Ethernet port of the 4D radar 20, the industrial control computer 171 is configured with an i9 of the 13th generation and a solid-state drive with an M.2 interface. The industrial control computer 171 is equipped with two peripheral PCI and PCI-E network cards. The PCI network card is for expanding the gigabit network and serving as a gigabit standby network port, and the PCI-E is a 10G fiber optic network card for data acquisition of the 4D radar 20; the industrial control computer 171 is electrically connected to the USB hub 172 and the switch 173 through two wire harnesses respectively;

[0046] The USB hub 172 provides multiple interfaces to support the operation of multiple instruments. The USB hub 172 is electrically connected to the power control, the CAN module 175, and the RS485 module 176 respectively. The USB hub 172 is used for the control of the programmable power supply 174 and the data reading of the CAN module 175 and the RS485 module 176;

[0047] The switch 173 is electrically connected to the linear controller 177, the in-vehicle Ethernet 178, and the target simulator 12 respectively;

[0048] The programmable power supply 174 is electrically connected to the radar 20 to be tested through the acquisition main line 16 to supply power to the radar 20 to be tested. Its output power is 150W, which can cover the power supply of all radar 20 products;

[0049] The CAN module 175 is used for the test of the CAN communication of the radar 20. At least two CAN channels can realize the test of the multi-channel CAN communication of the radar 20;

[0050] The linear controller 177 is used to control the start and stop of the linear drive mechanism 14;

[0051] The in-vehicle Ethernet 178 is mainly used for the communication of the 4D radar 20 and supports the communication of 100M Ethernet.

[0052] Optionally, as Figure 2 shown, the dark box 11 includes multiple body segments 112, and the multiple body segments 112 are sequentially spliced along the horizontal direction to form the dark box 11. In this embodiment, the dark box 11 includes 9 body segments 112, and the length of each body segment 112 along the first direction X is less than or equal to 1 meter, which can meet the test requirements of a laboratory with limited space; the number of body segments 112 can be freely increased or decreased according to actual needs and is not limited to the above.

[0053] Optionally, the overall length of the camera obscura 11 is, for example, 9 meters, but is not limited thereto.

[0054] Optionally, the inner wall of the camera obscura 11 is provided with domestic absorbing cotton. In this application, domestic absorbing cotton is used for wave absorption. Although its wave absorption performance is 2 db worse than that of imported absorbing cotton from abroad, it has high cost performance. It can not only meet the test requirements, but also has the advantages of low price, being quickly available, and no technology blockade.

[0055] Optionally, as Figure 2 shown, at least one body segment 112 is provided with an openable side door 113.

[0056] The above embodiments are only illustrative of the principles and effects of the present application, rather than limiting the present application. Any person familiar with this technology can modify or change the above embodiments without departing from the spirit and scope of the present application. Therefore, all equivalent modifications or changes made by those with ordinary knowledge in the technical field without departing from the spirit and technical idea disclosed in the present application should still be covered by the claims of the present application.

Claims

1. A radar test system, characterized in that, It includes a dark box, a target simulator, a rotating mechanism, a linear drive mechanism and a corner cube assembly installed in the dark box. The rotating mechanism is used to fix the radar and drive the radar to move for radar testing. The corner cube assembly is connected to the linear drive mechanism. The linear drive mechanism is used to drive the corner cube assembly to move towards or away from the rotating mechanism, so as to adapt to different types of radar testing. The RF part of the target simulator is arranged in the dark box.

2. The radar test system according to claim 1, wherein The rotating mechanism includes a horizontal drive part, a polarization drive part and a clamping part for clamping the radar. The drive end of the horizontal drive part is connected to the polarization drive part, and the drive end of the polarization drive part is connected to the clamping part. The horizontal drive part is used to drive the polarization drive part and the clamping part to deflect in the horizontal plane for radar horizontal angle and vertical angle testing. The polarization drive part is used to drive the clamping part to rotate to realize radar polarization. When performing radar field of view angle testing, after the polarization drive part drives the clamping part and the radar clamped by it to be polarized, the horizontal drive part drives the polarization drive part and the clamping part to deflect in the horizontal plane for radar testing.

3. The radar test system according to claim 2, wherein The radar test system further includes a point source laser. The point source laser is fixed on the clamping part during central alignment calibration. The laser point emitted by the point source laser hits the corner center of the corner cube assembly or the center of the RF part, so that the center of the radar to be tested is aligned with the corner center or the center of the RF part.

4. The radar test system according to claim 3, characterized in that The radar test system further includes a first horizontal alignment instrument and a second horizontal alignment instrument. The first horizontal alignment instrument is arranged in the dark box and is used for calibration in the vertical direction between the corner of the corner cube assembly and the radar to be tested. The second horizontal alignment instrument is arranged outside the dark box and is used for calibrating the pitching direction of the corner of the corner cube assembly.

5. The radar test system according to claim 1, characterized in that, The linear drive mechanism includes a linear drive guide rail and a movable seat. The movable seat is movably connected to the linear drive guide rail. The corner cube assembly is installed on the movable seat. The linear drive guide rail is used to drive the movable seat to move linearly.

6. The radar test system according to claim 5, wherein, The corner cube assembly includes a first base, a first corner cube and a telescopic driver connected to the first base. The first base is connected to the movable seat. The telescopic driver is connected to the first corner cube. The telescopic driver is used to drive the first corner cube to telescopically move towards or away from the rotating mechanism to simulate the breathing action of a human.

7. The radar test system according to claim 6, characterized in that, The corner cube assembly further includes a second base and a second corner cube connected to the second base. The second base is connected to the movable seat. The linear drive mechanism further includes a translation driver. The translation driver is used to drive the first base and / or the second base to move closer or farther away from each other to test the angular resolution of the radar.

8. The radar test system according to claim 7, characterized in that, The corner cube assembly further includes a third corner cube, which is connected to the second base. The second corner cube and the third corner cube are arranged vertically opposite to each other. The protruding lengths of the second corner cube and the third corner cube facing the rotating mechanism are different. The second corner cube and the third corner cube cooperate to test the range resolution of the radar.

9. The radar test system according to any one of claims 1 to 8, characterized in that including at least one of the following: The radar test system further includes a collection main line, at least part of which is arranged in the dark box. At least two connectors are connected to the collection main line, and each connector is used to dock different models of the radar. The radar test system further includes a control system, which is electrically connected to the collection main line. The control system obtains the signals of the radar to be tested through the collection main line.

10. The radar test system according to any one of claims 1 to 8, characterized in that, including at least one of the following: The dark box includes a plurality of body segments, and the plurality of body segments are sequentially spliced along the horizontal direction to form the dark box. The inner wall of the dark box is provided with domestic absorbing cotton. At least one of the body segments is provided with an openable side door.

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