Testing method, device and system for the impact of bumper on millimeter wave radar performance

Abstract

The present invention provides a method and a device and system for testing the impact of a bumper on millimeter-wave radar performance. The device for testing the impact of a bumper on millimeter-wave radar performance includes: a turntable; a base, the base is slidably disposed on the turntable, and can move horizontally or vertically on the turntable; a tooling, which is mounted on the base through a rotating shaft and can rotate axially driven by the rotating shaft; the tooling is used to set a bumper for testing; a driving module, which is respectively connected to the base and the rotating shaft, and is used to drive the movement of the base and the rotation of the rotating shaft. The testing device of the present invention is simple to operate, has a low testing cost, and can efficiently implement the test of the impact of a bumper on millimeter-wave radar performance.

Description

Technical Field

[0001] The present invention relates to the technical field of vehicle testing, and in particular to a testing method and a device and system for testing the influence of a bumper on the performance of a millimeter-wave radar. Background Art

[0002] With the popularity of millimeter-wave radars on vehicles, evaluating and analyzing the impact of bumpers on millimeter-wave radar performance is an essential key link. The existing technology is to directly use the entire bumper for test analysis. First, this method is difficult to set up the test environment, the operation is relatively complicated, and a larger test site is required; second, due to the various shapes of bumpers, it is impossible to test each one, and the test effect is not good; third, more and more OEMs are starting to evaluate during the vehicle design process, and there is no actual bumper for test analysis at this time.

[0003] Therefore, it is particularly important to find a universal method that can quickly analyze the impact of the bumper on the performance of the millimeter-wave radar and provide guidance for the early installation and verification of the millimeter-wave radar on the bumper. Summary of the invention

[0004] In view of the above-mentioned shortcomings of the prior art, an object of the present invention is to provide a test method and device and system for the impact of a bumper on millimeter-wave radar performance, so as to solve the deficiency of directly using a whole bumper for test analysis in the prior art.

[0005] To achieve the above-mentioned purpose and other related purposes, the present invention provides a device for testing the influence of a bumper on the performance of a millimeter-wave radar, comprising: a turntable; a base, the base being slidably disposed on the turntable and being capable of moving laterally or longitudinally on the turntable; a tooling, mounted on the base via a rotating shaft and being capable of axially rotating driven by the rotating shaft; the tooling is used to set a bumper for testing; and a driving module, respectively connected to the base and the rotating shaft, for driving the movement of the base and the rotation of the rotating shaft.

[0006] In one embodiment of the present invention, the tooling has an arc-shaped groove with at least one curvature, so as to make the bumper material into the test bumper with at least one curvature.

[0007] In one embodiment of the present invention, the device further includes: an angle sensor, disposed on the base, for measuring the rotation angle of the rotating shaft.

[0008] In one embodiment of the present invention, the device further includes: a first bracket for setting the millimeter wave radar and being able to adjust the height of the millimeter wave radar; and a second bracket for setting the target reflector and being able to adjust the height of the target reflector.

[0009] To achieve the above-mentioned purpose and other related purposes, the present invention provides a system for testing the influence of a bumper on the performance of a millimeter-wave radar, comprising: the device for testing the influence of a bumper on the performance of a millimeter-wave radar; an electronic device connected to the driving module and used to control the driving module to adjust the relative position of the tested bumper and the millimeter-wave radar; and a device for recording the detection data of the millimeter-wave radar at each relative position, so as to analyze the influence of the bumper on the performance of the millimeter-wave radar.

[0010] To achieve the above-mentioned object and other related objects, the present invention provides a method for testing the influence of a bumper on the performance of a millimeter-wave radar, comprising: relatively arranging a millimeter-wave radar and a target reflector at the same height and at a preset distance; arranging a test bumper laterally between the millimeter-wave radar and the target reflector, and adjusting the relative position of the test bumper and the millimeter-wave radar; recording the detection data of the millimeter-wave radar at each relative position, and analyzing the influence of the test bumper on the performance of the millimeter-wave radar accordingly.

[0011] In one embodiment of the present invention, adjusting the relative position of the test bumper and the millimeter-wave radar includes: adjusting one or more combinations of the front-rear position, left-right position and pitch position of the test bumper and the millimeter-wave radar.

[0012] In one embodiment of the present invention, the method further includes: placing the test bumper in arc-shaped slots of different curvatures in a tooling to adjust the curvature of the test bumper; for the test bumper of each curvature, adjusting its relative position with the millimeter-wave radar; recording the detection data of the millimeter-wave radar at each relative position between the test bumper of each curvature and the millimeter-wave radar, and analyzing the influence of the test bumper on the performance of the millimeter-wave radar based on the data.

[0013] In one embodiment of the present invention, only the left and right positions of the test bumper and the millimeter-wave radar are adjusted and the detection data is recorded to analyze the performance impact, including: setting the test bumper and the millimeter-wave radar perpendicular to the ground respectively; keeping the vertical distance between the center of the millimeter-wave radar and the test bumper unchanged; adjusting the millimeter-wave radar to move in a direction perpendicular to the central axis of the test bumper; calculating the equivalent horizontal angle after each movement and the detection data of the millimeter-wave radar at the equivalent horizontal angle, so as to analyze the impact on the performance of the millimeter-wave radar at each equivalent horizontal angle; wherein the equivalent horizontal angle is the difference in the vertical distance between the left and right edges of the millimeter-wave radar and the millimeter-wave radar.

[0014] In one embodiment of the present invention, the formula for calculating the equivalent horizontal angle includes:

[0015]

[0016]

[0017]

[0018] Among them, d1 is the vertical distance between the left edge of the millimeter-wave radar and the millimeter-wave radar, d2 is the vertical distance between the center of the millimeter-wave radar and the millimeter-wave radar, and d3 is the vertical distance between the right edge of the millimeter-wave radar and the millimeter-wave radar; R is the curvature of the test bumper, sd is the vertical distance between the central axis of the millimeter-wave radar and the central axis of the test bumper; py is the distance between the center of the millimeter-wave radar and its left and right edges; △d is the equivalent horizontal angle.

[0019] As described above, the method and device and system for testing the impact of a bumper on millimeter-wave radar performance of the present invention have the following beneficial effects:

[0020] First, the present invention overcomes the shortcomings of the prior art. It does not require testing the bumper of a specific vehicle model. The impact of the bumper on the radar performance can be analyzed in the early stage of the test. The test environment is easy to build and the operation is simple.

[0021] Second, the present invention does not require field testing, and can quickly test and analyze the impact of the bumper on radar performance in a darkroom, greatly reducing the impact of the field environment on the test results;

[0022] Thirdly, the present invention is carried out in a darkroom, so there is no need to open up a separate test site, and only corresponding test tools need to be made, which effectively utilizes existing resources and greatly saves test costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 Shown is a schematic structural diagram of a device for testing the influence of a bumper on millimeter-wave radar performance according to the present invention.

[0024] Figure 2 Display as Figure 1 A schematic structural diagram of the device shown in another viewing angle.

[0025] Figure 3 Display as Figure 1 A schematic diagram of the structure of the tooling in the device shown in the top view.

[0026] Figure 4 Display as Figure 1 A schematic diagram of the structure in which the tooling in the device is arranged on a base via a rotating shaft.

[0027] Figure 5 Shown is a schematic diagram of the placement of the radar, bumper, and target reflector during testing.

[0028] Figure 6 Shown is a flow chart of a method for testing the impact of a bumper on millimeter-wave radar performance according to the present invention.

[0029] Figure 7a-7b The diagrams respectively show the position relationship between the millimeter wave radar and the test bumper in each example of the present invention. DETAILED DESCRIPTION

[0030] The following describes the embodiments of the present invention by specific examples, and those skilled in the art can easily understand other advantages and effects of the present invention from the contents disclosed in this specification. The present invention can also be implemented or applied through other different specific embodiments, and the details in this specification can also be modified or changed in various ways based on different viewpoints and applications without departing from the spirit of the present invention. It should be noted that the following embodiments and features in the embodiments can be combined with each other without conflict.

[0031] It should be noted that the illustrations provided in the following embodiments are only used to illustrate the basic concept of the present invention in a schematic manner, and thus the illustrations only show components related to the present invention rather than being drawn according to the number, shape and size of components in actual implementation. In actual implementation, the type, quantity and proportion of each component may be changed arbitrarily, and the component layout may also be more complicated.

[0032] like Figure 1 As shown, this embodiment provides a device for testing the impact of a bumper on millimeter wave radar performance, which at least includes: a turntable 1, a base 2, a tool 3, and a drive module. A pulley can be provided at the bottom of the turntable 1 to facilitate the movement of the entire device and facilitate the operation of the tester.

[0033] The base 2 is slidably disposed on the turntable 1 and can move horizontally or vertically on the turntable 1. Specifically, the base 2 is slidably disposed on the turntable 1 through a slide rail bracket 4. Figure 1 As shown, the turntable 1 is provided with a slide groove 101 along the X-axis direction (i.e., the horizontal direction), and the lower end of the slide rail bracket 4 is connected to the slide groove 101 and can move back and forth in the slide groove 101 along the X-axis direction. The upper end of the slide groove 101 is provided with a slide groove 401, and the lower part of the base 2 is connected to the slide groove 401 and can move back and forth in the slide groove 401 along the Y-axis direction (i.e., the longitudinal direction).

[0034] like Figure 2 and Figure 3As shown, the tooling 3 has a plurality of arc-shaped slots 301 with different curvature radii. The tester places a bumper material, such as a rectangular flat bumper of suitable size and the same process as the actual vehicle bumper, into different arc-shaped slots 301, and the rectangular flat bumper can be bent into an arc-shaped bumper with a corresponding curvature radius by the arc-shaped slots 301, so as to facilitate testing the influence of bumpers with different curvatures on the performance of the millimeter-wave radar.

[0035] The driving module includes: a power mechanism for controlling the slide rail bracket 4 to move along the X-axis, a power mechanism for controlling the base 2 to move along the Y-axis, and a power mechanism for controlling the base 2 to generate a pitch angle.

[0036] like Figure 2 As shown, the power mechanism for controlling the base 2 to generate a pitch angle includes a stepper motor 5 disposed at one end of the base 2, and a worm gear 6 connected to the stepper motor 5. A rotating shaft 7 is mounted on the base 2, see Figure 4 , both ends of the rotating shaft 7 are fixed on the base 2 by the bracket 701, one end of the rotating shaft 7 passes through the bracket 701 and is connected to the worm gear 6, the middle part of the rotating shaft 7 is used to carry the tooling 3, and this part is suspended relative to the surface of the base 2. In this way, the stepping motor 5 drives the worm gear 6 to rotate, and the worm gear 6 drives the rotating shaft 7 to rotate, thereby realizing the pitch angle change of the tooling 3. In addition, if Figure 2 As shown, in order to obtain the pitch angle of the tooling 3 , an angle sensor 8 is further provided at one end of the base 2 .

[0037] like Figure 1 As shown, in one embodiment, the device for testing the impact of a bumper on the performance of a millimeter-wave radar of the present application further includes a first bracket 9, which is used to set the millimeter-wave radar 10 and adjust the height of the millimeter-wave radar 10. In addition, in one embodiment, the device for testing the impact of a bumper on the performance of a millimeter-wave radar of the present application further includes a second bracket (not shown) for setting a target reflector (such as a corner reflector) and adjusting the height of the target reflector.

[0038] like Figure 5As shown, when the device of this embodiment is in use, the placement positions of the millimeter-wave radar 10, the bumper 11, and the target reflector 12 should be adjusted to the same horizontal height. The drive module including the stepper motor 5, the angle sensor 8, the millimeter-wave radar 10 and other components are connected to the external electronic device in communication, thereby forming a system for testing the impact of the bumper on the performance of the millimeter-wave radar. The electronic device 10 can be a desktop computer, a portable computer, a tablet computer, a smart phone, etc., which is used to control the drive module to adjust the relative position of the bumper used for the test and the millimeter-wave radar, such as: front and rear position, left and right position, pitch position, etc., and is also used to record the detection data of the millimeter-wave radar at each relative position, so as to analyze the impact of the bumper on the performance of the millimeter-wave radar.

[0039] It should be noted that the device for testing the impact of bumpers on millimeter wave radar performance in this application is not limited to Figure 1 to Figure 4 The structure shown, reasonable modifications or changes made to the above embodiments by those skilled in the art under the spirit of the present invention should be regarded as within the protection scope of this application.

[0040] like Figure 6 As shown, the present application also provides a method for testing the impact of a bumper on millimeter-wave radar performance. The method can be implemented by means of the system for testing the impact of a bumper on millimeter-wave radar performance introduced in the above embodiment or similar systems, and mainly includes the following steps:

[0041] S61: The millimeter wave radar and the target reflector are relatively arranged at the same height and separated by a preset distance;

[0042] S62: placing a test bumper transversely between the millimeter-wave radar and the target reflector, and adjusting the relative position of the test bumper and the millimeter-wave radar, such as one or more combinations of a front-to-back position, a left-to-right position, and a pitch position of the test bumper and the millimeter-wave radar;

[0043] S63: Recording the detection data of the millimeter-wave radar at each relative position, and analyzing the influence of the test bumper on the performance of the millimeter-wave radar based on the data.

[0044] In one embodiment, before step S61, the method further includes: placing the test bumper in an arc-shaped slot of a curvature in the tooling to adjust the curvature of the test bumper; for the test bumper of the curvature, executing step S62 to adjust its relative position with the millimeter-wave radar. Subsequently, the test bumper is placed in an arc-shaped slot of another curvature in the tooling, and step S62 is executed again. In this way, step S63 will record the detection data of the millimeter-wave radar at each relative position between the test bumper of each curvature and the millimeter-wave radar, so as to analyze the influence of the test bumper on the performance of the millimeter-wave radar.

[0045] The following will be combined Figure 7a-7b The implementation principle of this method is explained in detail through four specific examples.

[0046] Example 1: Test and analyze the impact of different distances from the radar to the bumper on radar performance

[0047] Step a: Bend a flat rectangular bumper of appropriate size with a length of L and a width of W along the long side L into an arc with a curvature radius of R using a test fixture. The fixture has multiple arc-shaped slots with different curvature radii. Since the structure of the fixture has been described in detail in the previous embodiment, it will not be repeated here. Adjust the rotating shaft of the above-mentioned test device so that the wide side W of the bumper is perpendicular to the ground. At this time, the pitch angle of the bumper is 0°, and the angle between the millimeter-wave radar and the bumper in the pitch direction is also 0°. The height H1 of the millimeter-wave radar is adjusted by the first bracket so that it is at the same height as the bumper and the corner reflector.

[0048] Step b: By adjusting the movement of the base of the test device on the slide rail bracket, the horizontal center of the millimeter-wave radar is aligned with the horizontal center of the arc-shaped bumper, that is, the horizontal offset distance sd of the horizontal center of the millimeter-wave radar from the horizontal center of the arc-shaped bumper is 0. At this time, the horizontal distances from the horizontal center of the radar on the surface of the millimeter-wave radar cover are the left and right points of Py, and the distances d1 and d3 to the bumper are equal, such as Figure 7a shown.

[0049] Step c: by adjusting the movement of the slide rail support of the test device on the turntable, the vertical distance d2 from the horizontal center of the millimeter-wave radar to the bumper is adjusted, and the impact on the performance of the millimeter-wave radar at different distances d2 is analyzed by computer testing;

[0050] Step d: by adjusting the movement of the base of the test device on the slide rail bracket, the difference between d1 and d3 is Δd, and the influence on the radar performance at different distances d2 is tested and analyzed;

[0051] Example 2: Test and analyze the impact of different angles between the radar and the bumper on radar performance

[0052] Step e: Keep the pitch angle FY between the radar and the bumper at 0°, fix the distance d2 from the horizontal center of the radar to the bumper and the curvature radius R of the bumper, keep the height H1 of the millimeter-wave radar at the same height as the bumper and the corner reflector, adjust the horizontal offset distance sd between the radar and the bumper by adjusting the movement of the base of the test device on the slide rail bracket, and easily calculate d1 and d3 and their difference Δd by the following formula, and test and analyze the impact on the radar performance at different equivalent horizontal angles, i.e., different differences Δd;

[0053]

[0054]

[0055]

[0056] Wherein, d1 is the vertical distance between the left edge of the millimeter-wave radar and the millimeter-wave radar, d2 is the vertical distance between the center of the millimeter-wave radar and the millimeter-wave radar, and d3 is the vertical distance between the right edge of the millimeter-wave radar and the millimeter-wave radar; R is the curvature of the test bumper, sd is the vertical distance between the central axis of the millimeter-wave radar and the central axis of the test bumper; py is the distance between the center of the millimeter-wave radar and its left and right edges; △d is the equivalent horizontal angle;

[0057] Step f: The pitch angle of the tooling is adjusted by adjusting the rotating shaft of the test device, thereby adjusting the pitch angle FY between the radar and the bumper to be not 0°, and testing and analyzing the impact on the radar performance at different equivalent horizontal angles, i.e., different difference values ​​Δd;

[0058] Example 3: Test and analysis of the impact of different bumper curvatures on radar performance

[0059] Step g: Keep the pitch angle FY between the radar and the bumper at 0°, keep the distance d2 from the horizontal center of the radar to the bumper unchanged, and the horizontal offset distance sd at 0, keep the height H1 of the millimeter-wave radar at the same height as the bumper and the corner reflector, and test and analyze the impact of different curvature radii R on the radar performance;

[0060] Step h: adjust the horizontal offset distance sd, keep the pitch angle FY at 0°, keep the distance d2 unchanged, and test and analyze the influence of different curvature radii R on radar performance;

[0061] Step i: Keep the horizontal offset distance sd at 0, adjust the pitch angle FY so that it is not 0°, keep the distance d2 unchanged, and test and analyze the impact of different curvature radii R on radar performance;

[0062] Step j: adjust the horizontal offset distance sd to the distance in step h, adjust the pitch angle FY to the angle in step i, and test and analyze the influence of different curvature radii R on radar performance;

[0063] Example 4: Test and analysis of the impact of different pitch angles between the bumper and the radar on radar performance

[0064] Step k: fix the distance d2 and the curvature radius R from the horizontal center of the radar to the bumper unchanged, and the horizontal offset distance sd is 0, keep the height H1 of the millimeter-wave radar at the same height as the bumper and the corner reflector, and test and analyze the impact of different pitch angles FY between the bumper and the radar on the radar performance;

[0065] Step 1: Adjust the horizontal offset distance sd, and test and analyze the impact of different pitch angles FY between the bumper and the radar on the radar performance.

[0066] It should be noted that the above four examples should not be regarded as limiting the scope of protection of the present application. Those skilled in the art can select one of the four variables of the vertical distance between the millimeter-wave radar and the test bumper, the horizontal offset distance, the pitch angle, and the curvature of the test bumper through the control variable method to remain unchanged, and study the performance impact of changes in the other three aspects; or, select two of them to remain unchanged through the control variable method, and study the performance impact of changes in the other two aspects; or, select three of them to remain unchanged through the control variable method, and study the performance impact of changes in the other one aspect; or, control all four aspects to change, and study the performance impact of each change in the combination, etc.

[0067] In summary, the test method and device and system of the bumper impact on millimeter-wave radar performance of the present invention are simple to operate and have low testing costs. They can efficiently realize the test of the bumper impact on millimeter-wave radar performance, effectively overcome the various shortcomings of the prior art and have high industrial utilization value.

[0068] The above embodiments are merely illustrative of the principles and effects of the present invention, and are not intended to limit the present invention. Anyone familiar with the art may modify or alter the above embodiments without departing from the spirit and scope of the present invention. Therefore, all equivalent modifications or alterations made by a person of ordinary skill in the art without departing from the spirit and technical concept disclosed by the present invention shall still be covered by the claims of the present invention.

Claims

1. A device for testing the impact of a bumper on millimeter wave radar performance, characterized in that: At least used to test and analyze the impact of different bumper curvatures on radar performance, including: Turntable; A base, the base is slidably disposed on the turntable and can move horizontally or vertically on the turntable; The tooling is mounted on the base through a rotating shaft and can rotate axially under the drive of the rotating shaft; the tooling is used to set a bumper for testing, and the bumper for testing is made of a rectangular flat bumper with the same process and matching size as the physical bumper; the tooling has an arc-shaped slot with at least one curvature, and the arc-shaped slot is used to adjust the bumper for testing to a corresponding curvature; The driving module is respectively connected to the base and the rotating shaft to drive the base to move and the rotating shaft to rotate.

2. The device according to claim 1, characterized in that Also includes: The angle sensor is arranged on the base and is used to measure the rotation angle of the rotating shaft.

3. The device according to claim 1, characterized in that Also includes: A first bracket, used to set the millimeter wave radar and to adjust the height of the millimeter wave radar; The second bracket is used to set the target reflector and can adjust the height of the target reflector.

4. A system for testing the impact of a bumper on millimeter wave radar performance, characterized in that: include: The device for testing the effect of a bumper on millimeter-wave radar performance as claimed in any one of claims 1 to 3; An electronic device, connected to the driving module, and used to control the driving module to adjust the relative position of the test bumper and the millimeter wave radar; And used to record the detection data of the millimeter-wave radar at each relative position, so as to analyze the influence of the bumper on the performance of the millimeter-wave radar.

5. A method for testing the impact of a bumper on millimeter wave radar performance, characterized in that: The device for testing the influence of a bumper on millimeter wave radar performance according to any one of claims 1 to 3, wherein the method is at least used to test and analyze the influence of different curvatures of the bumper on the radar performance, comprising: The millimeter wave radar and the target reflector are relatively arranged at the same height and separated by a preset distance; The bumper for testing is sequentially placed in arc-shaped slots with different curvatures in the tooling to adjust the curvature of the bumper for testing, wherein the bumper for testing is made of a rectangular flat bumper with the same process and matching size as the physical bumper; For each of the test bumpers of each curvature, the test bumper is disposed transversely between the millimeter-wave radar and the target reflector, and the relative position of the test bumper and the millimeter-wave radar is adjusted; The detection data of the millimeter-wave radar at each relative position between the test bumper of each curvature and the millimeter-wave radar are recorded, so as to analyze the influence of the test bumpers of different curvatures on the performance of the millimeter-wave radar.

6. The method according to claim 5, characterized in that Adjusting the relative position of the test bumper and the millimeter-wave radar includes: adjusting one or more combinations of the front-rear position, the left-right position, and the pitch position of the test bumper and the millimeter-wave radar.

7. The method according to claim 6, characterized in that Only the left and right positions of the test bumper and the millimeter wave radar are adjusted and the detection data is recorded to analyze the performance impact, including: The test bumper and the millimeter-wave radar are respectively arranged perpendicular to the ground; Maintaining a vertical distance between the center of the millimeter-wave radar and the test bumper unchanged; Adjusting the millimeter-wave radar to move in a direction perpendicular to the central axis of the test bumper; The equivalent horizontal angle after each movement and the detection data of the millimeter-wave radar at the equivalent horizontal angle are calculated to analyze the impact on the performance of the millimeter-wave radar at each equivalent horizontal angle; wherein the equivalent horizontal angle is the difference between the left and right edges of the millimeter-wave radar and the vertical distance of the millimeter-wave radar.

8. The method according to claim 7, characterized in that The formula for calculating the equivalent horizontal angle includes: Among them, d1 is the vertical distance between the left edge of the millimeter-wave radar and the millimeter-wave radar, d2 is the vertical distance between the center of the millimeter-wave radar and the millimeter-wave radar, and d3 is the vertical distance between the right edge of the millimeter-wave radar and the millimeter-wave radar; R is the curvature of the test bumper, sd is the vertical distance between the central axis of the millimeter-wave radar and the central axis of the test bumper; py is the distance between the center of the millimeter-wave radar and its left and right edges; △d is the equivalent horizontal angle.

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