PMCW millimeter wave radar calibration device

Abstract

The utility model relates to a calibration device, belongs to the technical field of radar calibration, and particularly relates to a PMCW millimeter wave radar calibration device which comprises supporting legs, a distance plate, a vertical plate, a first sliding groove, a lifting block, a mounting plate, a first motor, a second screw rod, a vertical rod, a rotating rod, a first limiting rod, a first threaded sleeve and a second motor. The lower surface of the rotating rod is rotatably connected with a fixing frame, the upper surface of the fixing frame is fixedly connected with a fixing rod, and the surface of the fixing rod is rotatably connected with a limiting rod II; according to the utility model, the calibration angle of the radar body can be adjusted through the arranged angle adjusting assembly, the test accuracy is improved, and the problems that the angle of the millimeter-wave radar cannot be adjusted at present, and the calibration angle is one of important parameters for calibration of the millimeter-wave radar are solved. The problem that the scanning range of the radar to the surrounding environment and the accuracy of measurement data are directly influenced is solved.

Description

Technical Field

[0001] The utility model relates to the technical field of radar calibration, in particular to a PMCW millimeter wave radar calibration device. Background Art

[0002] The calibration of a millimeter wave radar is a calibration process used to ensure that the radar system can accurately measure the distance, speed, and angle of a target object.

[0003] In the prior art, for example, a Chinese patent with the publication number CN220626649U discloses a millimeter wave radar calibration device, which includes a workbench with a chute opened thereon; a fixed rod is fixedly connected to the top of the workbench, a screw rod is rotatably connected to the fixed rod, a moving frame is threadedly connected to the outer side wall of the screw rod, a bidirectional screw rod is rotatably connected to the moving frame, and a sliding plate is threadedly connected to the outer side wall of the bidirectional screw rod. This patent can achieve the installation of millimeter wave radars of different sizes, making the device applicable to millimeter wave radars of different sizes. And by rotating the screw rod, the moving frame can be lifted, realizing the adjustment of the height of the millimeter wave radar, and the distance between the calibration plate and the millimeter wave radar can be adjusted. Moreover, through the setting of the indicating head and scale, it is convenient for personnel to know the distance between the calibration plate and the millimeter wave radar, improving the accuracy of millimeter wave radar calibration.

[0004] However, the above patent has some deficiencies. In the actual use process, when adjusting the millimeter wave radar, although the height can be adjusted and the calibration distance can be adjusted by coordinating with the movement of the calibration plate, the angle adjustment of the millimeter wave radar cannot be achieved. The calibration angle is one of the important parameters in millimeter wave radar calibration, which directly affects the scanning range of the radar for the surrounding environment and the accuracy of measurement data. Therefore, a PMCW millimeter wave radar calibration device is proposed to solve the above problems. Summary of the Utility Model

[0005] In order to solve the above technical problems, the utility model proposes a PMCW millimeter wave radar calibration device. By setting an angle adjustment component, the calibration angle of the radar body can be adjusted, improving the accuracy of the test.

[0006] The technical solution for achieving the purpose of the present utility model is as follows: A PMCW millimeter-wave radar calibration device includes support legs. The upper surface of the support legs is fixedly connected with a distance plate. The upper surface of the distance plate is fixedly connected with a vertical plate. A first chute is opened on one side of the vertical plate. An elevating block is slidably connected to the inner wall of the first chute. One side of the elevating block is fixedly connected with a mounting plate. A first motor is fixedly installed on the upper surface of the mounting plate. A second screw rod is rotatably connected to the lower surface of the mounting plate. The top end of the second screw rod is coaxially installed with the output end of the first motor. A vertical rod is fixedly connected to the lower surface of the elevating block. The bottom end of the vertical rod is rotatably connected with a rotating rod. A first limiting rod is rotatably connected to the upper surface of the rotating rod. A first threaded sleeve is threadedly connected to the surface of the second screw rod. The surface of the first threaded sleeve is rotatably connected to the end of the first limiting rod away from the rotating rod. A second motor is fixedly connected to the upper surface of the rotating rod. The output end of the second motor is coaxially installed with a third screw rod. A second threaded sleeve is threadedly connected to the surface of the third screw rod. The lower surface of the rotating rod is rotatably connected with a fixed frame. A fixed rod is fixedly connected to the upper surface of the fixed frame. A second limiting rod is rotatably connected to the surface of the fixed rod. The end of the second limiting rod away from the fixed rod is rotatably connected to the surface of the second threaded sleeve.

[0007] In some embodiments, a first screw rod is rotatably connected to the inner wall of the first chute. A threaded hole is penetrated through one side of the elevating block. The inner wall of the threaded hole is threadedly connected to the surface of the first screw rod. The bottom end of the first screw rod penetrates through the lower surface of the distance plate and is fixedly installed with a first rotating handle.

[0008] In some embodiments, a scale plate is arranged on the upper surface of the distance plate. A second chute is opened on the upper surface of the distance plate. A fourth screw rod is rotatably connected to the inner wall of the second chute. A limiting frame is threadedly connected to the surface of the fourth screw rod. A calibration plate is slidably arranged in the inner wall of the limiting frame. The lower surface of the limiting frame is slidably connected to the inner wall of the second chute. One end of the fourth screw rod penetrates through one side of the distance plate and is fixedly installed with a second rotating handle.

[0009] In some embodiments, limiting plates are slidably connected to both sides of the inner wall of the fixed frame through sliding rods. Springs are sleeved on the surfaces of the two sliding rods. The ends of the two sliding rods and the two springs away from the limiting plates are fixedly connected to the same clamping plate.

[0010] In some embodiments, a radar body is arranged inside the fixed frame. The two clamping plates are respectively slidably connected to the inner wall of the fixed frame.

[0011] Compared with the prior art, the present utility model has the following remarkable advantages:

[0012] By starting Motor 1 and Motor 2, the present utility model can achieve the synchronous rotation of Screw 2 and Screw 3, thereby driving Threaded Sleeve 1 and Threaded Sleeve 2 to slide on the surfaces of Screw 2 and Screw 3. Through the rotational connection between Threaded Sleeve 1 and the Rotating Rod, and the rotational connection between Threaded Sleeve 2 and the Fixed Frame, the rotation of the Rotating Rod can achieve the angular adjustment in the vertical direction, and the angular adjustment of the Fixed Frame in the horizontal direction, improving the adaptability of the calibration angle, thereby improving the accuracy of the test.

[0013] It solves the problem that the existing technology fails to adjust the angle of the millimeter-wave radar. The calibration angle is one of the important parameters for calibrating the millimeter-wave radar, which directly affects the scanning range of the radar for the surrounding environment and the accuracy of the measurement data. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] The following further explains the present utility model with reference to the drawings and embodiments:

[0015] Figure 1 is the overall three-dimensional structure schematic diagram provided by the present utility model in one embodiment;

[0016] Figure 2 is the structure schematic diagram of the adjustment assembly provided by the present utility model in one embodiment;

[0017] Figure 3 is provided by the present utility model in one embodiment Figure 2 The enlarged structure schematic diagram at A in;

[0018] Figure 4 is the structure schematic diagram of the radar fixing mechanism provided by the present utility model in one embodiment.

[0019] Description of the reference numerals in the drawings:

[0020] 1. Support leg; 2. Distance plate; 3. Scale plate; 4. Vertical plate; 5. First chute; 6. Screw 1; 7. First turning handle; 8. Lifting block; 9. Mounting plate; 10. Motor 1; 11. Screw 2; 12. Threaded Sleeve 1; 13. First limiting rod; 14. Vertical rod; 15. Rotating rod; 16. Motor 2; 17. Screw 3; 18. Threaded Sleeve 2; 19. Fixed rod; 20. Second limiting rod; 21. Fixed frame; 22. Radar body; 23. Limiting plate; 24. Spring; 25. Clamping plate; 26. Limiting frame; 27. Calibration plate; 28. Second chute; 29. Screw 4; 30. Second turning handle. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0021] The following is a detailed description of the present utility model. The technical solutions in the embodiments of the present utility model are clearly and completely described. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts belong to the protection scope of the present utility model.

[0022] The present utility model provides a PMCW millimeter-wave radar calibration device through improvement. The technical solution of the present utility model is as follows:

[0023] As Figures 1-4 shown, a PMCW millimeter-wave radar calibration device includes a support leg 1. A distance plate 2 is fixedly connected to the upper surface of the support leg 1. A vertical plate 4 is fixedly connected to the upper surface of the distance plate 2. A chute one 5 is opened on one side of the vertical plate 4. A lifting block 8 is slidably connected to the inner wall of the chute one 5. By lifting and lowering the lifting block 8 on the inner wall of the chute one 5, the height adjustment of the radar body 22 can be realized. One side of the lifting block 8 is fixedly connected to a mounting plate 9. A motor one 10 is fixedly installed on the upper surface of the mounting plate 9. A screw two 11 is rotatably connected to the lower surface of the mounting plate 9. The top end of the screw two 11 is coaxially installed with the output end of the motor one 10. A vertical rod 14 is fixedly connected to the lower surface of the lifting block 8. The bottom end of the vertical rod 14 is rotatably connected to a rotating rod 15. The rotating rod 15 is a square hollow tube, which can reduce the weight and the energy loss of the motor one 10. A limiting rod one 13 is rotatably connected to the upper surface of the rotating rod 15. A thread sleeve one 12 is threadedly connected to the surface of the screw two 11. The surface of the thread sleeve one 12 is rotatably connected to the end of the limiting rod one 13 away from the rotating rod 15. The limiting rod one 13 is rotatably connected to the thread sleeve one 12 and the rotating rod 15 respectively through two rectangular plates and the rotating shafts arranged on the rectangular plates. A motor two 16 is fixedly connected to the upper surface of the rotating rod 15. The output end of the motor two 16 is coaxially installed with a screw three 17. A thread sleeve two 18 is threadedly connected to the surface of the screw three 17. A fixed frame 21 is rotatably connected to the lower surface of the rotating rod 15. The fixed frame 21 is set as a rectangle, which can be better adapted to the radar body 22. A fixed rod 19 is fixedly connected to the upper surface of the fixed frame 21. A limiting rod two 20 is rotatably connected to the surface of the fixed rod 19. The end of the limiting rod two 20 away from the fixed rod 19 is rotatably connected to the surface of the thread sleeve two 18.

[0024] As Figure 2 and 3 shown, in one embodiment, a screw one 6 is rotatably connected to the inner wall of the chute one 5. A threaded hole is penetrated through one side of the lifting block 8. The inner wall of the threaded hole is threadedly connected to the surface of the screw one 6. The bottom end of the screw one 6 penetrates through the lower surface of the distance plate 2 and is fixedly installed with a turning handle one 7. By turning the turning handle, the rotation of the screw one 6 is driven, thereby realizing the lifting function.

[0025] A scale plate 3 is provided on the upper surface of the distance plate 2. Through the provided scale plate 3, the calibration distance of the calibration plate 27 can be visually observed. A second chute 28 is opened on the upper surface of the distance plate 2. A fourth screw 29 is rotatably connected to the inner wall of the second chute 28. A limit frame 26 is threadedly connected to the surface of the fourth screw 29. A calibration plate 27 is slidably arranged inside the limit frame 26. Through the sliding connection between the calibration plate 27 and the limit frame 26, it is convenient to replace the calibration plates 27 with different reflectivities for multiple calibration tests. The lower surface of the limit frame 26 is slidably connected to the inner wall of the second chute 28. One end of the fourth screw 29 penetrates through one side of the distance plate 2 and is fixedly installed with a second turning handle 30.

[0026] As Figure 3 and 4 As shown, in an embodiment, both sides of the inner wall of the fixed frame 21 are slidably connected to limit plates 23 through sliding rods. Springs 24 are sleeved on the surfaces of both sliding rods. One end of both sliding rods and both springs 24 away from the limit plates 23 are fixedly connected to the same clamping plate 25. The surface of the clamping plate 25 fits with the inner wall of the fixed frame 21 to improve the stability of sliding.

[0027] A radar body 22 is arranged inside the fixed frame 21. According to the actual situation where the fixed frame 21 drives the radar body 22 to the corresponding position of the second threaded sleeve 18 in the figure, the calibration angle of the radar body 22 deviates to one side of the scale plate 3. In the figure, for the sake of clear structural construction, the change of the angle is not drawn. The two clamping plates 25 are respectively slidably connected to the inner wall of the fixed frame 21.

[0028] The specific working method is as follows: When in use, first place the radar body 22 inside the fixed frame 21 and clamp and fix it through the two limit plates 23 and the two clamping plates 25. Then, according to the calibration requirements of the millimeter-wave radar, rotate the first turning handle 7 to drive the first screw 6 to move the lifting block 8 up and down, changing the height of the radar body 22. By rotating the second turning handle 30, driving the rotation of the fourth screw 29, the distance between the calibration plate 27 and the radar body 22 can be adjusted, so as to meet the calibration requirements of the millimeter-wave radar. Then, the millimeter-wave radar can be started for calibration;

[0029] When a calibration angle test is required, start the first motor 10 and the second motor 16 simultaneously, which can realize the synchronous rotation of the second screw 11 and the third screw 17, and further drive the first threaded sleeve 12 and the second threaded sleeve 18 to slide on the surfaces of the second screw 11 and the third screw 17. Through the rotational connection between the first threaded sleeve 12 and the rotating rod 15, and the rotational connection between the second threaded sleeve 18 and the fixed frame 21, the rotation of the rotating rod 15 can realize the angle adjustment in the vertical direction and the angle adjustment of the fixed frame 21 in the horizontal direction, improving the adaptability of the calibration angle, thereby improving the accuracy of the test.

[0030] The technical means disclosed by the solution of the present utility model are not limited to those disclosed by the above-mentioned technical means, but also include technical solutions composed of equivalent replacements of the above technical features. Matters not covered by the present utility model are common general knowledge in the art.

Claims

1. A PMCW millimeter wave radar calibration device, comprising a support leg (1), characterized in that: The upper surface of the support leg (1) is fixedly connected with a distance plate (2), the upper surface of the distance plate (2) is fixedly connected with a vertical plate (4), one side of the vertical plate (4) is provided with a slide groove (5), the inner wall of the slide groove (5) is slidably connected with a lifting block (8), one side of the lifting block (8) is fixedly connected with a mounting plate (9), the upper surface of the mounting plate (9) is fixedly installed with a motor (10), the lower surface of the mounting plate (9) is rotatably connected with a screw rod (11), the top end of the screw rod (11) is coaxially installed with the output end of the motor (10), the lower surface of the lifting block (8) is fixedly connected with a vertical rod (14), the bottom end of the vertical rod (14) is rotatably connected with a rotating rod (15), and the upper surface of the rotating rod (15) is rotatably connected with a limit rod (1) 13), the surface of the second screw rod (11) is threadedly connected with a threaded sleeve (12), the surface of the threaded sleeve (12) is rotatably connected with the end of the limit rod (13) away from the rotating rod (15), the upper surface of the rotating rod (15) is fixedly connected with the second motor (16), the output end of the second motor (16) is coaxially mounted with a third screw rod (17), the surface of the third screw rod (17) is threadedly connected with the second threaded sleeve (18), the lower surface of the rotating rod (15) is rotatably connected with a fixed frame (21), the upper surface of the fixed frame (21) is fixedly connected with a fixed rod (19), the surface of the fixed rod (19) is rotatably connected with the second limit rod (20), and the end of the second limit rod (20) away from the fixed rod (19) is rotatably connected with the surface of the second threaded sleeve (18).

2. A PMCW millimeter wave radar calibration device according to claim 1, characterized in that: The inner wall of the slide groove (5) is rotatably connected to a screw rod (6), and a threaded hole is penetrated through one side of the lifting block (8). The inner wall of the threaded hole is threadedly connected to the surface of the screw rod (6), and the bottom end of the screw rod (6) penetrates the lower surface of the distance plate (2) and is fixedly mounted with a turning handle (7).

3. A PMCW millimeter wave radar calibration device according to claim 1, characterized in that: The upper surface of the distance plate (2) is provided with a scale plate (3), the upper surface of the distance plate (2) is provided with a second slide groove (28), the inner wall of the second slide groove (28) is rotatably connected with a screw rod four (29), the surface of the screw rod four (29) is threadedly connected to a limit frame (26), the inner wall of the limit frame (26) is slidably provided with a calibration plate (27), the lower surface of the limit frame (26) is slidably connected with the inner wall of the second slide groove (28), one end of the screw rod four (29) passes through one side of the distance plate (2) and is fixedly installed with a turning handle two (30).

4. A PMCW millimeter wave radar calibration device according to claim 1, characterized in that: Both sides of the inner wall of the fixed frame (21) are slidably connected to the limit plate (23) via sliding rods, the surfaces of the two sliding rods are sleeved with springs (24), and the ends of the two sliding rods and the two springs (24) away from the limit plate (23) are fixedly connected to the same clamping plate (25).

5. A PMCW millimeter wave radar calibration device according to claim 4, characterized in that: A radar body (22) is arranged inside the fixing frame (21), and the two clamping plates (25) are respectively slidably connected to the inner wall of the fixing frame (21).

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