High-precision radar static calibration adjustable test bench

Abstract

The utility model relates to the technical field of radar calibration equipment, in particular to a high-precision radar static calibration adjustable test bench which comprises a base, and a multidirectional fixing frame is arranged on the base. The multidirectional fixing frame comprises a supporting frame rotationally installed on the base, a transverse rotating frame is arranged on the supporting frame, the rotating axis of the transverse rotating frame is parallel to the base, and a longitudinal moving frame capable of linearly moving in the width direction of the transverse rotating frame is arranged on the transverse rotating frame. According to the utility model, the multidirectional fixing frame is arranged, the supporting frame capable of realizing autorotation on the multidirectional fixing frame and the transverse steering frame transversely rotating on the supporting frame are utilized, so that rotation simulation in two directions can be realized, and the longitudinal moving frame capable of linearly moving along the width direction of the transverse steering frame is arranged on the transverse steering frame; the reflecting plate is fixed on the longitudinal moving frame, so that the reflecting plate can simulate application scenes of various pitching and horizontal angles, and the test precision is improved.

Description

Technical Field

[0001] This utility model relates to the field of radar calibration equipment technology, specifically to a high-precision radar static calibration adjustable test bench. Background Technology

[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 elevation and horizontal angular resolution. As a sensor component in vehicles, millimeter-wave radar and other sensor components need to be statically calibrated during the research and development and testing phase. Without precise measurement and adjustment, the accuracy and reliability of the measurement results cannot be guaranteed. Calibration or calibration is a necessary adjustment and test for the radar to eliminate errors and deviations in the system, thereby obtaining more accurate and reliable measurement results.

[0003] Static calibration involves measuring the horizontal and elevation angles of a reflector and then calculating the radar's installation angle. Since static calibration scheme verification and performance testing require precise adjustments to the reflector, a high-precision, adjustable testing device needs to be designed to improve the accuracy and efficiency of these processes. However, current technology for reflector performance testing merely involves simple calibration and adjustment of the testing device using laser reflection at the factory, which cannot simulate various application scenarios involving elevation and horizontal angles, resulting in low testing accuracy.

[0004] Therefore, a high-precision radar static calibration adjustable test bench is proposed to solve the problems mentioned above. Utility Model Content

[0005] Technical problems to be solved

[0006] In view of the above-mentioned shortcomings of the existing technology, the present invention provides a high-precision radar static calibration adjustable test bench, which can effectively solve the problem of the single and unsatisfactory accuracy testing method for reflectors in the existing technology.

[0007] Technical solution

[0008] To achieve the above objectives, this utility model provides the following technical solution:

[0009] This utility model provides a high-precision radar static calibration adjustable test bench, including a base, on which a multi-directional fixed frame is provided; the multi-directional fixed frame includes a support frame rotatably mounted on the base, a transverse rotating frame located on the support frame, the rotation axis of the transverse rotating frame being parallel to the base, and a longitudinal moving frame located on the transverse rotating frame that can move linearly along the width direction of the transverse rotating frame, and a reflector plate being detachably connected to the front end of the longitudinal moving frame.

[0010] Furthermore, the base is provided with height-adjustable support legs at its bottom end.

[0011] Furthermore, the longitudinal moving frame is slidably mounted on the transverse rotating frame via a lead screw mounted on the transverse rotating frame.

[0012] Furthermore, a counterweight structure is provided on the support frame.

[0013] Furthermore, the counterweight structure is located on the side of the support frame away from the reflector.

[0014] Furthermore, the front bottom side of the longitudinal moving frame is provided with an upward-facing guide rail, the opening of which is in clearance fit with the reflector.

[0015] Furthermore, a guide rail is provided on each of the two front sides of the longitudinal moving frame, and the two guide rails are symmetrically distributed with their openings facing each other.

[0016] Furthermore, a scale is provided at one end of the transverse rotating frame facing the longitudinal moving frame. Beneficial effects

[0017] The technical solution provided by this utility model has the following advantages compared with the known public technology:

[0018] This invention, by setting up 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, to achieve rotation simulation in two directions. A longitudinal moving frame capable of linearly moving along the width direction of the transverse bogie is set on the transverse bogie, which can centralize the adjustment of the reflector in multiple directions / degrees of freedom such as azimuth, pitch, and height into one device, making it convenient to adjust at any time and improving the accuracy and efficiency of scheme verification and performance index testing. Attached Figure Description

[0019] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0020] Figure 1 This is a schematic diagram of the test bench structure in an embodiment of the present invention;

[0021] Figure 2 This is a schematic diagram of the reflector assembly structure in an embodiment of this utility model;

[0022] Figure 3 This is a schematic diagram of the rear structure of the test bench in an embodiment of this utility model;

[0023] Figure 4 This is a schematic diagram of the horizontal rotating frame in the pitch (clockwise) state in an embodiment of this utility model;

[0024] Figure 5 This is a schematic diagram of the horizontal rotating frame in the pitch (counterclockwise) state in an embodiment of this utility model.

[0025] The labels in the diagram represent: 1. Base; 11. Support leg; 2. Multi-directional fixed frame; 21. Support frame; 211. Counterweight structure; 22. Lateral rotating frame; 221. Lead screw; 222. Scale; 23. Longitudinal moving frame; 231. Guide rail; 24. Reflector. Detailed Implementation

[0026] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. All other embodiments obtained by those skilled in the art based on the embodiments of this utility model without creative effort are within the scope of protection of this utility model.

[0027] The present invention will be further described below with reference to the embodiments. Example

[0028] This embodiment proposes a high-precision adjustable test bench for radar static calibration. (See attached document.) Figure 1-5 The calibration turntable in this embodiment mainly includes a base 1, which is rectangular in shape. The bottom of the base 1 is provided with a height-adjustable support leg 11. The support leg 11 in this solution can be set as a universal roller. In addition, the universal roller in this embodiment can be height-adjusted. The adjustment method is not specifically limited and is existing technology. It can be achieved by setting a screw above the support leg 11 and setting a threaded groove at the bottom of the base 1 that is threaded with the screw.

[0029] The base 1 is equipped with a multi-directional fixing frame 2. In this embodiment, the reflector that needs to be measured can be detached and installed on the multi-directional fixing frame 2. The multi-directional fixing frame 2 can realize the simulation of multiple directions, so that the reflector can complete the simulation of different directions and achieve the purpose of simulating multiple application scenarios.

[0030] 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.

[0031] The support frame 21 is provided with a horizontal rotating frame 22. A motor is vertically fixed at the side end of the support frame 21, and the horizontal rotating frame 22 is fixed on the output shaft of the motor. The rotation axis of the output shaft of the motor is parallel to the base. A longitudinal moving frame 23 is provided on the horizontal rotating frame 22, which can move linearly along the width direction of the horizontal rotating frame 22. A reflector 24 is detachably connected to the front end of the longitudinal moving frame 23.

[0032] Specifically, a lead screw 221 is inserted into the transverse rotating frame 22, and one side of the longitudinal moving frame 23 is sleeved on the lead screw 221. The sleeved part is provided with an internal thread groove that is threaded to the lead screw 221. At the same time, a guide rail is provided between the longitudinal moving frame 23 and the transverse rotating frame 22, so that when the lead screw 221 is rotated, it will drive the longitudinal moving frame 23 to move linearly.

[0033] It should be noted that the top of the lead screw 221 is equipped with a turntable handle. In addition, it can be adjusted to be electrically driven to rotate as needed. The reflector 24 can be adjusted in multiple directions / degrees of freedom, such as pitch, azimuth, and height. This can meet the requirements for static calibration scheme verification and performance index testing under high precision conditions.

[0034] Since the longitudinal moving frame 23 realizes the rotation of the pitch angle of the reflector 24, the existing technology cannot concentrate the multi-degree-of-freedom adjustment into one device and the device accuracy is insufficient. It often requires the assembly and splicing of multiple devices, which will cause too much redundancy and complex structure, resulting in the device being too large and not meeting the requirements of lightweight and miniaturization. It is also inconvenient to carry and calibrate it. This embodiment is based on this consideration. The size and weight of the entire device are relatively light. However, the reflector 24 has a certain weight due to its own material. When the longitudinal moving 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.

[0035] The counterweight structure 211 consists of several stacked metal blocks, each with a mass of 1 kg. The specific number of stacked blocks depends on the actual pitch angle required; the larger the pitch angle, the more metal blocks need to be stacked.

[0036] In order to achieve a better counterweight effect, in this embodiment, a rectangular platform extends outward from one side of the support frame 21, and the counterweight structure 211 is set on the side of the support frame 21 away from the reflector 24, that is, on the rectangular platform.

[0037] The pitch and yaw turntables can be manually operated with a joystick to adjust the horizontal and vertical angles, with a reference accuracy of 0.05~0.1°. Therefore, the device in this embodiment can meet the requirements of multi-degree-of-freedom adjustment, satisfying the verification of different static calibration schemes and performance index testing. By integrating multi-degree-of-freedom adjustment into one unit, the structure is simple, lightweight, and miniaturized, making it easy to carry for field calibration without being restricted by location.

[0038] In this embodiment, in order to improve testing efficiency, the reflector 24 is fixed to the entire frame in a detachable manner. The front bottom side of the longitudinal moving frame 23 for fixing the reflector 24 is provided with an upward-facing guide rail 231. 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 clearance-fitted with the reflector 24. During assembly, the reflector 24 is inserted into the guide rail 231 for fixing.

[0039] In this embodiment, the guide rail 231 is provided in two sections and is symmetrically distributed on both sides of the lower front end of the longitudinal moving frame 23.

[0040] Furthermore, a guide rail 231 is provided on the left and right sides of the front end of the longitudinal moving frame 23. The two guide rails 231 are symmetrically distributed and their openings face 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 reflector plate 24 is embedded in the guide rail 231 provided on the bottom side of the front end, thereby improving the fixing and limiting effect.

[0041] Since the longitudinal moving frame 23 in this embodiment is manually adjustable, a scale 222 is provided at one end of the transverse rotating frame 22 facing the longitudinal moving frame 23 in order to accurately control the adjustment range.

[0042] Based on the above, the test bench in this embodiment provides a high-precision adjustable test bench for radar static calibration. By measuring the horizontal and pitch angles of a reflector 24, the installation angle of the radar can be calculated. In addition, the reflector 24 can be adjusted in multiple directions / degrees of freedom, such as azimuth, pitch, and elevation, into one device, which is convenient for adjustment at any time and improves the accuracy and efficiency of scheme verification and performance index testing. Finally, the device has a simple structure, is lightweight, miniaturized, and easy to carry for field calibration.

[0043] The above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions will not cause the essence of the corresponding technical solutions to deviate from the protection scope of the technical solutions of the embodiments of this utility model.

Claims

1. A high-precision radar static calibration adjustable test bench, characterized in that, Includes a base (1), on which a multi-directional fixing frame (2) is provided; The multi-directional fixed frame (2) includes a support frame (21) rotatably mounted on the 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, and a longitudinal moving frame (23) is provided on the transverse rotating frame (22) that can move linearly along the width direction of the transverse rotating frame (22), and a reflector plate (24) is detachably connected to the front end of the longitudinal moving frame (23).

2. The high-precision radar static calibration adjustable test bench according to claim 1, characterized in that, The base (1) is provided with height-adjustable support feet (11) at its bottom end.

3. The high-precision radar static calibration adjustable test bench according to claim 1, characterized in that, The longitudinal moving frame (23) is guided and slidably mounted on the transverse rotating frame (22) by a lead screw (221) mounted on the transverse rotating frame (22).

4. A high-precision radar static calibration adjustable test bench according to claim 1 or 3, characterized in that, The support frame (21) is provided with a counterweight structure (211).

5. The high-precision radar static calibration adjustable test bench according to claim 4, characterized in that, The counterweight structure (211) is located on the side of the support frame (21) away from the reflector (24).

6. The high-precision radar static calibration adjustable test bench according to claim 1, characterized in that, The longitudinal moving frame (23) has an upward-facing guide rail (231) on its front bottom side, and the guide rail (231) is open and fits with the reflector (24) with a gap.

7. A high-precision radar static calibration adjustable test bench according to claim 6, characterized in that, The longitudinal moving frame (23) has a guide rail (231) on each side of its front end. The two guide rails (231) are symmetrically distributed and their openings face each other.

8. The high-precision radar static calibration adjustable test bench according to claim 1, characterized in that, The transverse rotating frame (22) is provided with a scale (222) at one end facing the longitudinal moving frame (23).

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