System for evaluating influence of vehicle bumper on target detection performance of millimeter wave radar

Abstract

The utility model provides a system for evaluating the influence of a vehicle bumper on the target detection performance of a millimeter-wave radar, and the system comprises the millimeter-wave radar which is disposed at the rear part of the vehicle bumper; the slidable mechanism can do circular arc motion; the corner reflector is arranged on the slidable mechanism, and the corner reflector and the millimeter wave radar are located at the same height; the plurality of plate bodies can be assembled and disassembled, the surfaces of the plurality of plate bodies are provided with wave absorbing materials, and the plurality of plate bodies are assembled to at least surround the millimeter wave radar, the slidable mechanism and the corner reflector; and the upper computer is used for controlling the movement of the slidable mechanism and is also used for evaluating the influence of the vehicle bumper on the target detection performance of the millimeter-wave radar according to the echo signal received by the millimeter-wave radar in each sampling period.

Description

Technical Field

[0001] This utility model relates to the field of radar technology, and in particular to an evaluation system for the impact of vehicle bumpers on the target detection performance of millimeter-wave radar. Background Technology

[0002] With the development and popularization of autonomous vehicles, they are becoming increasingly intelligent and widely used. Both driver assistance and autonomous driving functions require various onboard radars for detection and perception to achieve their respective functions. Therefore, to ensure safe driving, precise measurement of the various performance characteristics of millimeter-wave radar is necessary.

[0003] Forward-facing millimeter-wave radars are typically mounted behind the vehicle bumper. An unsuitable bumper may affect the target detection performance of the millimeter-wave radar, or even render it inoperable. Therefore, it is necessary to verify the impact of the vehicle bumper on the target detection performance of the millimeter-wave radar.

[0004] Currently, the following method is commonly used to verify the impact of vehicle bumpers on the target detection performance of millimeter-wave radar: A slice of the bumper corresponding to the area through which the receiving / transmitting signal penetrates in front of the vehicle-mounted millimeter-wave radar is placed. According to the relative positions of the bumper and the vehicle-mounted millimeter-wave radar in the vehicle, the bumper slice and the vehicle-mounted millimeter-wave radar are mounted on a rotating table in an electromagnetically shielded darkroom. By driving the rotating table to rotate, the vehicle-mounted millimeter-wave radar detects the target (corner reflector) in front through the bumper slice. In this way, the impact of the bumper on the target detection performance of the millimeter-wave radar is evaluated.

[0005] However, due to the size limitations of the rotating stage inside the electromagnetic shielding darkroom, only the bumper can be sliced ​​for testing. Therefore, the test area of ​​the bumper is limited. The internal structures of the bumper and the accessories around the millimeter-wave radar cannot be tested together with the slice. Only the impact of the bumper slice area can be evaluated, and the overall impact of the bumper and the surrounding environment formed by the radar on the millimeter-wave radar target detection cannot be evaluated. Utility Model Content

[0006] This invention was developed to solve the aforementioned problems. Its purpose is to provide an evaluation system for the impact of vehicle bumpers on the target detection performance of millimeter-wave radar. This system can fully reflect the environment surrounding the entire vehicle bumper and the millimeter-wave radar, and the evaluation results are more reliable and accurate.

[0007] According to one aspect of the present invention, an evaluation system for assessing the impact of a vehicle bumper on the target detection performance of a millimeter-wave radar is provided, comprising: a millimeter-wave radar disposed behind the vehicle bumper; a sliding mechanism capable of circular motion; a corner reflector disposed on the sliding mechanism and at the same height as the millimeter-wave radar; multiple detachable plates, the surfaces of which are provided with a radar-absorbing material, and the plates are assembled to at least surround the millimeter-wave radar, the sliding mechanism, and the corner reflector; and a host computer for controlling the movement of the sliding mechanism, and further for evaluating the impact of the vehicle bumper on the target detection performance of the millimeter-wave radar based on the echo signal received by the millimeter-wave radar in each sampling cycle.

[0008] Preferably, the sliding mechanism includes an arc-shaped slide rail, a first driving unit, and a first upright rod. The first driving unit is used to drive the first upright rod to move on the arc-shaped slide rail, and the corner reflector is disposed on the first upright rod.

[0009] Preferably, the first driving unit includes a slider and a first motor, the first motor driving the slider to move on the arc-shaped slide rail, and the first upright is fixed to the slider.

[0010] Preferably, the corner reflector is movably mounted on the first upright.

[0011] Preferably, the sliding mechanism includes a second drive unit, a sliding table, a second upright and a connecting rod. The second drive unit is placed on the ground directly in front of the millimeter-wave radar, and the second drive unit is connected to the sliding table via the connecting rod. The second drive unit can drive the sliding table to move in an arc with the length of the connecting rod as the radius. The second upright is fixed to the sliding table, and the corner reflector is disposed on the second upright.

[0012] Preferably, the second drive unit includes a base plate and a second motor disposed on the base plate, and the connecting rod connects the second motor and the sliding table.

[0013] Preferably, the sliding table includes a base and at least one pulley, the second upright is fixed to a first surface of the base, and the at least one pulley is disposed on a second surface of the base.

[0014] Preferably, the second drive unit is placed close to the ground projection position of the millimeter-wave radar.

[0015] Preferably, the corner reflector is movably mounted on the second upright.

[0016] Preferably, the connecting rod is a telescopic rod.

[0017] Preferably, the multiple boards are made of wood.

[0018] Preferably, in evaluating the impact of the vehicle bumper on the target detection performance of the millimeter-wave radar based on the echo signal received by the millimeter-wave radar, the test curve of the millimeter-wave radar is obtained based on the echo signal received by the millimeter-wave radar, and compared with the preset curve of the millimeter-wave radar to evaluate the impact of the vehicle bumper on the target detection performance of the millimeter-wave radar. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of an evaluation system for assessing the impact of a vehicle bumper on the target detection performance of a millimeter-wave radar, provided in the first embodiment of this utility model.

[0020] Figure 2 This is a schematic diagram of an evaluation system for assessing the impact of a vehicle bumper on the target detection performance of a millimeter-wave radar, provided in the second embodiment of this utility model. Detailed Implementation

[0021] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the relevant utility model and not intended to limit the scope of the utility model. Furthermore, it should be noted that, for ease of description, only the parts relevant to the utility model are shown in the accompanying drawings.

[0022] The terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit this disclosure. As used herein, the singular forms “a” and “the” are also intended to include the plural forms unless the context clearly indicates otherwise. It will also be understood that when the terms “comprising” and / or “made of” are used in this specification, the presence of the said feature, integral, step, operation, element, and / or component is specified, but the presence or addition of one or more other features, integrals, steps, operations, elements, components, and / or groups thereof is not excluded.

[0023] The embodiments described herein can be described with reference to plan views and / or cross-sectional views using the ideal schematic diagrams of this disclosure. Therefore, the example illustrations can be modified according to manufacturing techniques and / or tolerances. Therefore, the embodiments are not limited to those shown in the drawings, but include modifications to configurations formed based on manufacturing processes. Therefore, the areas illustrated in the drawings are schematic in nature, and the shapes of the areas shown in the figures illustrate specific shapes of areas of an element, but are not intended to be limiting.

[0024] Unless otherwise specified, all terms used herein (including technical and scientific terms) have the same meaning as commonly understood by one of ordinary skill in the art. It will also be understood that terms such as those defined in commonly used dictionaries should be interpreted as having a meaning consistent with their meaning in the context of the relevant art and this disclosure, and will not be interpreted as having an idealized or overly formal meaning, unless expressly so defined herein.

[0025] Figure 1 This is a schematic diagram of an evaluation system for the impact of a vehicle bumper on the target detection performance of millimeter-wave radar, provided in the first embodiment of this utility model. The following is based on... Figure 1 This invention provides a description of the evaluation system 100 for assessing the impact of vehicle bumpers on millimeter-wave radar target detection performance. For example... Figure 1 As shown, the evaluation system for assessing the impact of a vehicle bumper on the target detection performance of a millimeter-wave radar provided by this utility model includes: a millimeter-wave radar 100, a sliding mechanism 120, a corner reflector 130, multiple detachable plates 110, and a host computer 140. The millimeter-wave radar 100 is located behind the bumper 11 of the vehicle 10. The sliding mechanism 120 can move in an arc. The corner reflector 130 is located on the sliding mechanism 120 and at the same height as the millimeter-wave radar 100. The surfaces of the multiple detachable plates 110 are provided with a wave-absorbing material 111, and the multiple plates are assembled to at least surround the millimeter-wave radar 100, the sliding mechanism 120, and the corner reflector 130. The host computer 140 is used to control the movement of the sliding mechanism 120, and the host computer 140 is also used to assess the impact of the vehicle bumper 11 on the target detection performance of the millimeter-wave radar 100 based on the echo signal received by the millimeter-wave radar 100 in each sampling cycle.

[0026] exist Figure 1 In the first embodiment shown, the sliding mechanism 120 includes an arc-shaped slide rail 121, a first drive unit 122, and a first upright 123. The first drive unit 122 drives the first upright 123 to move on the arc-shaped slide rail 121, and a corner reflector 130 is disposed on the first upright 123. In the first embodiment, the ground projection position of the millimeter-wave radar 100 is approximately located at the center of the arc-shaped slide rail 121.

[0027] Specifically, the first driving unit 122 includes a slider and a first motor (not shown). The first motor drives the slider to move on the arc-shaped slide rail 121, and the first upright 123 is fixed to the slider. When the first motor drives the slider to move on the arc-shaped slide rail 121, since the first upright 123 is fixed to the slider, the first upright 123 also moves on the arc-shaped slide rail 121. The direction of movement of the slider is as follows: Figure 1 As shown by the dashed arrow, it can move left and right.

[0028] The corner reflector 130 is mounted on the first upright 123. To ensure that the corner reflector 130 and the millimeter-wave radar 100 are at the same height, the corner reflector 130 can be movably mounted on the first upright 123. Therefore, in practical applications, the height of the corner reflector 130 can be adjusted to ensure that the corner reflector 130 and the millimeter-wave radar 100 are at the same height. The specific mounting method is not limited here.

[0029] The host computer 140 is connected to the first motor, so that the host computer 140 can control the first motor, thereby controlling the slider to move on the arc-shaped slide rail 121. Thus, the angle of the corner reflector 130 relative to the millimeter-wave radar 100 can also be controlled by the host computer 140.

[0030] In some embodiments, the multiple plates 110 are made of wood, and there may be at least three plates assembled in pairs at right angles to at least surround the millimeter-wave radar 100, the sliding mechanism 120, and the corner reflector 130. The height of the plates 110 needs to be much greater than the height of the corner reflector 130. The surfaces of the multiple plates 110 are provided with a radar-absorbing material 111. This radar-absorbing material effectively absorbs the electromagnetic waves emitted by the millimeter-wave radar, reduces reflection and multipath effects, and prevents the presence of metallic objects other than the reflecting target in the test device or test area from reflecting radar waves, i.e., prevents interference from metallic objects, thereby providing a more accurate test environment.

[0031] Specifically, when using this system to evaluate the impact of vehicle bumpers on millimeter-wave radar target detection performance, please refer to [the relevant documentation / reference]. Figure 1 The millimeter-wave radar 100 can be positioned at the center behind the bumper 11 of the vehicle 10. During testing, the host computer 140 controls the first motor, thereby controlling the slider to move on the arc-shaped slide rail 121, causing the corner reflector 130 to move in an arc on the arc-shaped slide rail 121. The echo signal reflected back from the corner reflector 130 at each angle within the detection range of the millimeter-wave radar 100 is acquired. Then, the echo signal is processed to obtain the test curve of the millimeter-wave radar 100. Then, it is compared with a preset curve, which is the test curve of the millimeter-wave radar under ideal conditions. It is determined whether the test curve is less than or equal to a certain preset range. If it is, the bumper under test is qualified; if not, the bumper under test is unqualified. This allows for the evaluation of the impact of the bumper on the performance of the millimeter-wave radar.

[0032] Figure 2 This is a schematic diagram of an evaluation system for assessing the impact of a vehicle bumper on the target detection performance of a millimeter-wave radar, provided in the second embodiment of this utility model.

[0033] Here, only the differences between the second embodiment and the first embodiment will be described.

[0034] The sliding mechanism 120' in the second embodiment differs from that in the first embodiment. The sliding mechanism 120' includes a second drive unit 121', a sliding table 122', a second upright 123', and a connecting rod 124'. The second drive unit 121' is placed on the ground directly in front of the millimeter-wave radar 100, and the second drive unit 121' is connected to the sliding table 122' via the connecting rod 124'. The second drive unit 121' can drive the sliding table 122' to move in an arc with the length of the connecting rod 124' as the radius. The second upright 123' is fixed to the sliding table 122', and the corner reflector 130 is placed on the second upright 123'.

[0035] The second drive unit 121' includes a base plate 1211' and a second motor 1212' disposed on the base plate 121', and the connecting rod 124' connects the second motor 1212' and the sliding table 122'.

[0036] The sliding table 122' includes a base 1221' and at least one pulley 1222'. A second upright 123' is fixed to the first surface (upper surface) of the base, and the at least one pulley 1222' is disposed on the second surface (lower surface) of the base 1221'. A second motor 1212' drives a connecting rod 124' to rotate around the second motor 1212'. Under the force of the connecting rod 124', the sliding table 122' moves in an arc with the length of the connecting rod 124' as the radius. When sliding, the direction of movement of the pulley 1222' is perpendicular to the connecting rod 124'.

[0037] In some embodiments, the second drive unit 121' is placed close to the ground projection position of the millimeter-wave radar 100.

[0038] To ensure that the corner reflector 130 and the millimeter-wave radar 100 are at the same height, the corner reflector 130 can be movably mounted on the second upright 123'. Therefore, in practical applications, the height of the corner reflector 130 can be adjusted to ensure that it is at the same height as the millimeter-wave radar 100; the specific mounting method is not limited here.

[0039] In some embodiments, the length of the connecting rod 124' is 2-4 meters. To facilitate adjustment of the length of the connecting rod 124', in some embodiments, the connecting rod 124' is a telescopic rod, whose length can be freely adjusted within a certain range, thereby adjusting the return of the electromagnetic waves from the millimeter-wave radar.

[0040] Specifically, when using this system to evaluate the impact of vehicle bumpers on millimeter-wave radar target detection performance, please refer to [the relevant documentation / reference]. Figure 2The millimeter-wave radar 100 can be positioned in the center behind the bumper 11 of the vehicle 10. During testing, the host computer 140 controls the second motor 1212' to drive the connecting rod 124' to rotate around the second motor 1212'. Under the force of the connecting rod 124', the sliding table 122' moves in an arc around the second motor 1212' with the length of the connecting rod 124' as the radius, thereby causing the corner reflector 130 to move in an arc around the second motor 1212'. The echo signals reflected from the corner reflector 130 at each angle within the detection range of the millimeter-wave radar 100 are acquired. The echo signals are then processed to obtain the test curve of the millimeter-wave radar 100. The test curve is then compared with a preset curve, which is the test curve of the millimeter-wave radar under ideal conditions. It is determined whether the test curve and the preset curve are less than or equal to a certain preset range. If they are, the bumper under test is qualified; otherwise, it is unqualified. This allows for the evaluation of the impact of the bumper on the performance of the millimeter-wave radar.

[0041] According to this application, the impact of a vehicle bumper on the target detection performance of a millimeter-wave radar can be assessed, and the assessment can fully reflect the environment around the entire vehicle bumper and the millimeter-wave radar, making the assessment results more reliable and accurate.

[0042] Those skilled in the art will recognize that the modules, units, and method steps of the various examples described in conjunction with the embodiments disclosed herein can be implemented in electronic hardware, computer software, or a combination of both. To clearly illustrate the interchangeability of electronic hardware and software, the components and steps of each example have been generally described in terms of functionality in the foregoing description. Whether these functions are implemented in electronic hardware or software depends on the specific application and design constraints of the technical solution. Those skilled in the art can implement the described functions using different methods for each specific application, but such implementation should not be considered beyond the scope of this invention.

[0043] Although this utility model has been described with reference to specific embodiments, those skilled in the art should recognize that the scope of this utility model is not limited to the specific combination of the above-described technical features, but also includes other technical solutions formed by any combination of the above-described technical features or their equivalents without departing from the inventive concept. For example, technical solutions formed by substituting the above-described features with (but not limited to) technical features with similar functions disclosed in this utility model.

Claims

1. An evaluation system for the influence of a vehicle bumper on the target detection performance of a millimeter wave radar, characterized by The system comprises: a millimeter wave radar arranged behind a vehicle bumper; a slidable mechanism capable of circular motion; an angle reflector arranged on the slidable mechanism and at the same height as the millimeter wave radar; a plurality of detachable plate bodies arranged with wave-absorbing material and assembled to at least surround the millimeter wave radar, the slidable mechanism and the angle reflector; and a host computer for controlling the motion of the slidable mechanism and evaluating the influence of the vehicle bumper on the target detection performance of the millimeter wave radar according to the echo signals received by the millimeter wave radar in each sampling period.

2. The system for evaluating the influence of a vehicle bumper on the target detection performance of a millimeter wave radar according to claim 1, wherein the slidable mechanism comprises a circular arc-shaped slide rail, a first driving unit and a first vertical rod, the first driving unit is used to drive the first vertical rod to move on the circular arc-shaped slide rail, and the angle reflector is arranged on the first vertical rod.

3. The system for evaluating the influence of a vehicle bumper on the target detection performance of a millimeter wave radar according to claim 2, wherein the first driving unit comprises a slider and a first motor, the first motor drives the slider to move on the circular arc-shaped slide rail, and the first vertical rod is fixed to the slider.

4. The system for evaluating the influence of a vehicle bumper on the target detection performance of a millimeter wave radar according to claim 2, wherein the angle reflector is movably arranged on the first vertical rod.

5. The system for evaluating the influence of a vehicle bumper on the target detection performance of a millimeter wave radar according to claim 1, wherein the slidable mechanism comprises a second driving unit, a sliding table, a second vertical rod and a connecting rod, the second driving unit is placed on the ground in front of the millimeter wave radar, the second driving unit is connected to the sliding table through the connecting rod, the second driving unit can drive the sliding table to make circular motion with the length of the connecting rod as the radius, the second vertical rod is fixed to the sliding table, and the angle reflector is arranged on the second vertical rod.

6. The system for evaluating the influence of a vehicle bumper on the target detection performance of a millimeter wave radar according to claim 5, wherein the second driving unit comprises a base plate and a second motor arranged on the base plate, and the connecting rod connects the second motor and the sliding table.

7. The system for evaluating the influence of a vehicle bumper on the target detection performance of a millimeter wave radar according to claim 5 or 6, wherein the sliding table comprises a base and at least one pulley, the second vertical rod is fixed to a first surface of the base, and the at least one pulley is arranged on a second surface of the base.

8. The system for evaluating the influence of a vehicle bumper on the target detection performance of a millimeter wave radar according to claim 5 or 6, wherein the placement position of the second driving unit is close to the ground projection position of the millimeter wave radar.

9. The system for evaluating the influence of a vehicle bumper on the target detection performance of a millimeter wave radar according to claim 5 or 6, wherein ​ ​ ​ ​ ​ ​ ​ ​ The corner reflector is movably arranged on the second vertical rod. 10.The system for evaluating the influence of a vehicle bumper on millimeter-wave radar target detection performance according to claim 5 or 6, wherein, The connecting rod is a telescopic rod. 11.The system for evaluating the influence of a vehicle bumper on millimeter-wave radar target detection performance according to any one of claims 1 to 6, wherein, The plurality of plate bodies are made of wood.

Images