High-precision radar static calibration adjustable test bench
By designing a multi-directional fixing frame and a multi-degree-of-freedom adjustment reflector test bench, the problem of low reflector test accuracy is solved, and high-precision solution verification and performance index testing are achieved to meet the requirements of lightweight and portability.
Patent Information
- Application Number
- CN202510377120.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-03-28
- Publication Date
- 2025-08-12
AI Technical Summary
In the prior art, the performance testing method of reflector plates is single, and it is impossible to simulate multiple pitch and horizontal angles, resulting in low testing accuracy.
A high-precision radar static calibration adjustable test bench is designed, including multi-directional fixing frame, support frame, transverse rotating frame and longitudinal moving frame, which can realize multi-directional adjustment of the reflector plate, including pitch, orientation and lifting, and multi-degree of freedom adjustment of the reflector plate is achieved through multi-directional fixing frame.
It improves the accuracy and efficiency of program verification and performance indicator testing, and the device structure is simple, lightweight and miniaturized, making it easier to carry out on-site calibration.
Smart Images
Figure CN120466548A_ABST
Abstract
Description
Technical Field
[0001] The present invention relates to the technical field of radar calibration equipment, and in particular to a high-precision radar static calibration adjustable test bench. Background Art
[0002] Millimeter-wave imaging radar has become the mainstream of next-generation millimeter-wave radar due to its long detection range, high detection accuracy, and strong pitch and horizontal angle resolution. As an on-board sensor component, millimeter-wave radar and other sensor components require static calibration during the R&D and testing phases. Without precise measurement and adjustment, the accuracy and reliability of the radar's measurement results cannot be guaranteed. Calibration is the necessary adjustment and testing of the radar to eliminate errors and deviations in the system, thereby obtaining more accurate and reliable measurement results.
[0003] Static calibration measures the horizontal and vertical angles of a reflector and calculates the radar's installation angle. Since static calibration solution verification and performance testing require precise adjustment of the reflector, a high-precision, adjustable test device is needed to improve accuracy and efficiency. However, existing technology for reflector performance testing relies solely on simple factory calibration and adjustment using laser reflections. This is unable to simulate a variety of pitch and horizontal angle scenarios, resulting in low test accuracy.
[0004] Therefore, a high-precision radar static calibration adjustable test bench is proposed to solve the above problems. Summary of the Invention
[0005] Technical problems solved In view of the above-mentioned shortcomings of the prior art, the present invention provides a high-precision radar static calibration adjustable test bench, which can effectively solve the problem of the single precision testing method and poor effect of the reflector in the prior art. Technical Solution
[0006] To achieve the above objectives, the present invention is implemented through the following technical solutions: The present invention provides an adjustable test bench for static calibration of a high-precision radar, comprising a base, wherein a multidirectional fixing frame is provided on the base; the multidirectional fixing frame comprises a supporting frame rotatably mounted on the base, a transverse rotating frame is provided on the supporting frame, the rotation axis of the transverse rotating frame is parallel to the base, a longitudinal movable frame is provided on the transverse rotating frame and can move linearly along the width direction of the transverse rotating frame, and a reflector is detachably connected to the front end of the longitudinal movable frame.
[0007] Furthermore, the bottom end of the base is provided with a height-adjustable support foot.
[0008] Furthermore, the longitudinal movable frame is slidably mounted on the transverse rotating frame through a guide screw installed on the transverse rotating frame.
[0009] Furthermore, a counterweight structure is provided on the support frame.
[0010] Furthermore, the counterweight structure is arranged on a side of the support frame away from the reflective plate.
[0011] Furthermore, a guide rail with an upward opening is provided on the bottom side of the front end of the longitudinal movable frame, and the opening of the guide rail faces upward and is in clearance fit with the reflective plate.
[0012] Furthermore, a guide rail is provided on both sides of the front end of the longitudinal movable frame, and the two guide rails are symmetrically distributed and have openings facing each other.
[0013] Furthermore, a scale is provided on one end of the transverse rotating frame facing the longitudinal movable frame. Beneficial effects
[0014] Compared with the known public technologies, the technical solution provided by the present invention has the following beneficial effects: The present invention provides a multi-directional fixed frame, utilizes a support frame capable of self-rotation on the multi-directional fixed frame and a transverse bogie that rotates laterally on the support frame, thereby realizing rotation simulation in two directions. A longitudinal movable frame capable of linear movement along the width direction of the transverse rotating frame is provided on the transverse bogie. The reflector can be adjusted in multiple directions / degrees of freedom such as azimuth, pitch, and lifting in one device, which is convenient for adjustment at any time and improves the accuracy and efficiency of solution verification and performance index testing. BRIEF DESCRIPTION OF THE DRAWINGS
[0015] To more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. Those skilled in the art can also derive other drawings based on these drawings without inventive effort.
[0016] Figure 1 This is a schematic diagram of the test bench structure in an embodiment of the present invention; Figure 2 This is a schematic diagram of the assembly structure of the reflector in an embodiment of the present invention; Figure 3 This is a schematic diagram of the rear structure of the test bench in an embodiment of the present invention; Figure 4 Schematic diagram of the pitch state (clockwise) of the lateral rotating frame in an embodiment of the present invention; Figure 5 Schematic diagram of the pitch state (counterclockwise) of the lateral rotating frame in an embodiment of the present invention.
[0017] The numbers in the figure represent: 1. base; 11. support leg; 2. multi-directional fixing frame; 21. support frame; 211. counterweight structure; 22. horizontal rotation frame; 221. screw rod; 222. scale; 23. longitudinal moving frame; 231. guide rail; 24. reflector. DETAILED DESCRIPTION
[0018] To make the purpose, technical solutions, and advantages of the embodiments of the present invention more clear, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.
[0019] The present invention will be further described below with reference to the embodiments. Example
[0020] This embodiment proposes a high-precision radar static calibration adjustable test bench, see the attached Figure 1-5 The calibration turntable in this embodiment mainly includes a base 1, which is rectangular in shape as a whole. A height-adjustable support leg 11 is provided at the bottom end of the base 1. The support leg 11 in this solution can be set to a universal roller shape. In addition, the universal roller in this embodiment can be height-adjusted. The adjustment method is not specifically limited. It is an existing technology and can be achieved by setting a screw above the support leg 11 and setting a screw groove at the bottom end of the base 1 to cooperate with the screw thread.
[0021] A multi-directional fixing frame 2 is provided on the base 1. The reflective plate to be measured in this embodiment can be detachably mounted on the multi-directional fixing frame 2. The multi-directional fixing frame 2 can realize simulation in multiple directions, thereby allowing the reflective plate to complete simulation in different directions and achieve the purpose of simulating multiple application scenarios.
[0022] The multi-directional fixing frame 2 includes a support frame 21 rotatably mounted on the base 1 . The support frame 21 is rotatably mounted on the base 1 via a rotating shaft and a bearing structure. The rotating shaft of the support frame 21 is perpendicular to the base 1 .
[0023] A transverse rotating frame 22 is provided on the support frame 21, and a motor is vertically fixed at the side end of the support frame 21. The transverse rotating frame 22 is fixed on the output shaft of the motor, and the rotation axis of the output shaft of the motor is parallel to the base. A longitudinal movable frame 23 that can move linearly along the width direction of the transverse rotating frame 22 is provided on the transverse rotating frame 22, and a reflective plate 24 is detachably connected to the front end of the longitudinal movable frame 23.
[0024] Specifically, a screw rod 221 is inserted into the transverse rotating frame 22, and one side of the longitudinal movable frame 23 is sleeved on the screw rod 221, and the sleeved portion is provided with an internal screw groove that cooperates with the thread of the screw rod 221. At the same time, a guide rail is provided between the longitudinal movable frame 23 and the transverse rotating frame 22, so that when the screw rod 221 is rotated, the longitudinal movable frame 23 will be driven to move linearly.
[0025] It should be noted that a turntable handle is provided at the top of the screw rod 221. In addition, it can be adjusted to electric drive rotation according to actual needs. The reflector 24 can be adjusted in multiple directions / degrees of freedom such as pitch, azimuth, lifting, etc., which can meet the static calibration solution verification and performance index testing under high precision.
[0026] Since the longitudinal movable frame 23 realizes the rotation of the pitch angle of the reflector 24, and the existing technology cannot concentrate the multi-degree-of-freedom adjustment on one device and the device accuracy is insufficient, it is often necessary to assemble and splice multiple devices, which will cause excessive redundancy and complex structure, resulting in the device being too large, not meeting the requirements of lightweight and miniaturization, and not convenient to carry and calibrate outside. This embodiment is based on this consideration. The volume and weight of the entire device are relatively light, and the reflector 24 has a certain weight due to its own material. When the longitudinal movable frame 23 rotates, it will cause the weight of the entire device to be unbalanced. Therefore, a counterweight structure 211 is provided on the support frame 21.
[0027] The counterweight structure 211 includes a number of stacked metal round blocks, each of which has a mass of 1 kg. The specific number of stacked metal round blocks depends on the actual required pitch angle. The larger the pitch angle, the more metal round blocks need to be stacked.
[0028] In order to achieve a better counterweight effect, a rectangular platform extends outward from one side of the support frame 21 in this embodiment, and the counterweight structure 211 is arranged on the side of the support frame 21 away from the reflector 24, that is, on the rectangular platform.
[0029] By manually controlling the pitch and yaw turntables with joysticks, horizontal and pitch angles can be adjusted with a reference accuracy of 0.05-0.1°. Therefore, the device of this embodiment can meet the requirements of multi-degree-of-freedom adjustment, satisfying the verification of different static calibration schemes and performance index testing. The integration of multiple degrees of freedom adjustment into a simple, lightweight, and compact structure makes it easy to carry out on-site calibration without being restricted by the site.
[0030] In order to improve the test efficiency, in this embodiment, the reflector 24 is fixed to the entire stand in a detachable manner. A guide rail 231 with an upward opening is provided on the bottom side of the front end of the longitudinal movable frame 23 for fixing the reflector 24. The cross-section of the guide rail 231 can be U-shaped or concave. The opening of the guide rail 231 faces upward and is gap-fitted with the reflector 24. During assembly, the reflector 24 is inserted into the guide rail 231 for fixation.
[0031] In this embodiment, the guide rail 231 is provided with two sections, and is symmetrically distributed on both sides of the lower end of the front end of the longitudinal movable frame 23 .
[0032] Furthermore, a guide rail 231 is provided on the left and right sides of the front end of the longitudinal movable frame 23, and the two guide rails 231 are symmetrically distributed and the openings are opposite to each other. During assembly, the guide rails 231 on the left and right sides of the front end are inserted from top to bottom until the bottom of the reflective plate 24 is embedded in the guide rail 231 set on the bottom side of the front end, thereby improving the fixed limiting effect.
[0033] Since the longitudinal movable frame 23 in this embodiment is manually adjusted, in order to precisely control the adjustment range, a scale 222 is provided on one end of the transverse rotating frame 22 facing the longitudinal movable frame 23 .
[0034] Based on the above, the test bench in this embodiment provides a high-precision radar static calibration adjustable test bench. By measuring the horizontal angle and pitch angle of a reflector 24, the installation angle of the radar is calculated. In addition, the multi-directional / degree-of-freedom adjustment of the reflector 24 in azimuth, pitch, lifting, etc. is concentrated in one device, which is convenient for adjustment at any time, thereby improving the accuracy and efficiency of solution verification and performance index testing. Finally, the device has a simple structure, is lightweight, and is miniaturized, making it easy to carry out for field calibration.
[0035] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit the same. 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 make equivalent replacements for some of the technical features therein. However, 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 various embodiments of the present invention.
Claims
1. A high-precision radar static calibration test bench, characterized in that: It comprises a base (1), wherein a multi-directional fixing frame (2) is provided on the base (1); The multi-directional fixed frame (2) comprises a support frame (21) rotatably mounted on a base (1); a transverse rotating frame (22) is provided on the support frame (21); the rotation axis of the transverse rotating frame (22) is parallel to the base; a longitudinal movable frame (23) is provided on the transverse rotating frame (22) and can be linearly moved along the width direction of the transverse rotating frame (22); and a reflective plate (24) is detachably connected to the front end of the longitudinal movable frame (23).
2. A high-precision radar static calibration test bench according to claim 1, characterized in that: The bottom end of the base (1) is provided with a height-adjustable support foot (11).
3. The high-precision radar static calibration test bench according to claim 1, characterized in that: The longitudinal moving frame (23) is slidably mounted on the transverse rotating frame (22) via a screw rod (221) mounted on the transverse rotating frame (22).
4. A high-precision radar static calibration test bench according to claim 1 or 3, characterized in that: A counterweight structure (211) is provided on the support frame (21).
5. A high-precision radar static calibration test bench according to claim 4, characterized in that: The counterweight structure (211) is arranged on a side of the support frame (21) away from the reflective plate (24).
6. The high-precision radar static calibration test bench according to claim 1, characterized in that: A guide rail (231) with an upward opening is provided on the bottom side of the front end of the longitudinal moving frame (23), and the opening of the guide rail (231) faces upward and is in clearance fit with the reflective plate (24).
7. The high-precision radar static calibration test bench according to claim 6, characterized in that: A guide rail (231) is provided on both sides of the front end of the longitudinal movable frame (23), and the two guide rails (231) are symmetrically distributed and have openings facing each other.
8. The high-precision radar static calibration test bench according to claim 1, characterized in that: A scale (222) is provided on one end of the transverse rotating frame (22) facing the longitudinal moving frame (23).