Millimeter wave radar calibration device

Abstract

The utility model discloses a millimeter wave radar calibration device which comprises a hanging plate, a calibration plate and a laser emitter, the hanging plate is rotatably connected with the calibration plate, and the laser emitter is installed on the calibration plate. The device further comprises a transmission shaft, a positioning plate, a positioning shaft and a transverse positioning mechanism. The transmission shaft is horizontally arranged left and right and is installed on the first base body in a rotating connection mode, the positioning plate is fixedly installed on the transmission shaft, and an arc guide groove is formed in the positioning plate; the positioning shaft is installed on the second base body and matched with the arc guide groove. The transverse positioning mechanism is installed on the second base body, and the tail end of the transverse positioning mechanism is used for being matched with a positioning hole formed in the positioning plate. The calibration plate is a first base body and the hanging plate is a second base body, or the hanging plate is the first base body and the calibration plate is the second base body. The device has the advantages of stable operation, no vibration, accurate positioning, convenience in operation and the like.

Description

Technical Field

[0001] The utility model belongs to the technical field of automobile calibration, and in particular relates to a radar calibration device. Background Art

[0002] With the continuous growth of automobile safety standards, automobile electronics levels and people's demand for driving safety, ADAS systems with active safety technology have shown a rapid development trend in recent years, and more and more cars are equipped with ADAS systems.

[0003] ADAS systems utilize numerous sensors, and any sensor failure can impact driving safety. To ensure proper sensor operation, sensors must be recalibrated in special circumstances (e.g., windshield removal or replacement, rear axle adjustment, wheel alignment, or front vehicle damage).

[0004] Millimeter-wave radar is a critical component used in vehicles to implement features such as adaptive cruise control and active hazard avoidance. Calibration of millimeter-wave radar requires a stable laser beam to illuminate the sensor. A reflector plate, strictly aligned with calibration requirements, provides two rotational depression angles to reflect the detection wave for calibration. Traditional laser emitters and reflectors cannot accurately and directly position the sensor at the desired angle, requiring repeated manual adjustment. This is inefficient and difficult to meet detection requirements. To address this issue, Chinese utility model patent application number CN210293707U provides a laser angle mirror device for ADAS calibration instruments. This device achieves angular positioning using a rotatable cam with a positioning slot, a tension spring, and a positioning shaft that cooperates with the slot. However, this structure also presents the following issues: When the positioning shaft engages the slot, the tension spring generates a certain amount of vibration, which not only affects repeatable positioning accuracy but also, with frequent operation, can cause wear on the slot, loosen the mechanical connection, and even damage the laser emitter. Utility Model Content

[0005] The utility model proposes a millimeter wave radar calibration device, the purpose of which is to solve the problem of vibration in the existing calibration device during angle positioning.

[0006] The technical solution of this utility model is as follows:

[0007] A millimeter-wave radar calibration device includes a hanging plate, a calibration plate, and a laser emitter. The hanging plate is rotatably connected to the calibration plate, and the axis of the rotation connection is horizontally arranged horizontally. The laser emitter is mounted on the calibration plate and further includes a transmission shaft, a positioning plate, a positioning shaft, and a lateral positioning mechanism.

[0008] The transmission shaft is horizontally arranged left and right and is mounted on the first base by a rotational connection. The positioning plate is fixedly mounted on the transmission shaft and has an arc guide groove formed on the positioning plate. The positioning shaft is mounted on the second base and cooperates with the arc guide groove. The transverse positioning mechanism is mounted on the second base, and the end thereof is used to cooperate with the positioning hole formed on the positioning plate.

[0009] The calibration plate is the first substrate and the hanging plate is the second substrate, or the hanging plate is the first substrate and the calibration plate is the second substrate.

[0010] As a further improvement to the millimeter wave radar calibration device: the positioning hole is located outside the arc guide groove.

[0011] As a further improvement of the millimeter wave radar calibration device: the lateral positioning mechanism is a screw ball.

[0012] As a further improvement of the millimeter wave radar calibration device: the positioning shaft is installed on the second base through a rotational connection.

[0013] As a further improvement of the millimeter-wave radar calibration device: when the calibration plate is the first substrate and the hanging plate is the second substrate, a first support plate is provided on the upper front side of the hanging plate, a first bearing is installed on the first support plate, and a rotating connecting shaft is installed on the upper rear side of the calibration plate, and the rotating connecting shaft cooperates with the first bearing.

[0014] As a further improvement of the millimeter-wave radar calibration device: a second support plate is provided on the lower front portion of the hanging plate, a second bearing is provided on the second support plate, and the positioning shaft cooperates with the second bearing.

[0015] As a further improvement to the millimeter-wave radar calibration device: a handwheel is installed at the end of the transmission shaft.

[0016] As a further improvement of the millimeter wave radar calibration device: the hand wheels are installed on both the left and right ends of the transmission shaft.

[0017] As a further improvement of the millimeter wave radar calibration device: a hanging hole is provided on the top of the hanging plate.

[0018] As a further improvement of the millimeter wave radar calibration device: a first level bubble arranged along the left-right direction and a second level bubble arranged along the front-back direction are installed on the calibration plate.

[0019] Compared with the prior art, the present invention has the following positive effects:

[0020] 1. When adjusting the angle of the utility model, the positioning shaft moves smoothly in the circular arc guide groove of the positioning plate. The vibration generated by the horizontal positioning mechanism during positioning only acts on the positioning plate, and the vibration direction is parallel to the direction of the rotating connecting shaft, which will not affect the positioning accuracy, nor cause wear of the circular arc guide groove, loosening of the mechanical connection parts, damage to the laser emitter due to vibration, and other problems.

[0021] 2. The positioning hole is located on the outside of the arc guide groove. Even if the positioning hole is worn, the resulting gap will be reduced after being converted into the angular error of the positioning plate. The angle error finally reflected on the calibration plate can be completely ignored. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a structural diagram of the utility model;

[0023] Figure 2 It is a structural diagram of the hanging plate part;

[0024] Figure 3 It is a structural diagram of the calibration plate part;

[0025] Figure 4 It is a structural diagram of the transmission shaft and positioning plate;

[0026] Figure 5 It is a structural diagram of the matching part of the positioning plate and the positioning shaft;

[0027] Figure 6 is a schematic diagram of the calibration plate being located at a first working angle;

[0028] Figure 7 is a schematic diagram of the calibration plate being located at a second working angle;

[0029] Figure 8 This is a schematic diagram of the calibration plate at the third working angle. DETAILED DESCRIPTION

[0030] The technical solution of the present invention will be described in detail below with reference to the accompanying drawings. Obviously, the embodiments described are only a part of the embodiments of the present invention, rather than all of the embodiments. Example 1

[0031] like Figure 1 A millimeter wave radar calibration device includes a hanging plate 1, a calibration plate 5 and a laser emitter 4. The laser emitter 4 is installed on the calibration plate 5.

[0032] like Figure 2 and 3The top of the hanging plate 1 is provided with a hanging hole 1-1. Two sets of left and right first support plates are located on the upper front portion of the hanging plate 1. The first support plates are mounted with first bearings. Left and right horizontally arranged rotating connecting shafts 11 are mounted on the upper rear portion of the calibration plate 5. These rotating connecting shafts 11 engage with the first bearings. A limit ring is also mounted on the rotating connecting shafts 11 for axial positioning.

[0033] The calibration plate 5 is provided with a first level bubble 8 arranged in the left-right direction and a second level bubble 9 arranged in the front-back direction. A handle 5-1 arranged in an oblique direction is also provided on the top of the calibration plate 5.

[0034] like Figures 1 to 5 The millimeter wave radar calibration device also includes a transmission shaft 3, a positioning plate 10, a positioning shaft 7 and a lateral positioning mechanism.

[0035] The transmission shaft 3 is horizontally arranged on the left and right sides and is mounted on the back side of the calibration plate 5 through a third bearing. A limit ring is installed on the transmission shaft 3 for axial positioning. In this embodiment, the handwheel 2 is installed on both the left and right ends of the transmission shaft 3.

[0036] The positioning plate 10 is fixedly mounted on the transmission shaft 3 and is provided with an arc guide groove 10-2 and a positioning hole 10-1 outside the arc guide groove 10-2. The distance between each point on the arc guide groove 10-2 and the rotation axis of the transmission shaft 3 gradually changes along the rotation direction.

[0037] In this embodiment, there are three groups of positioning holes 10-1, corresponding to three different working angles. Markings are provided beside the positioning holes 10-1.

[0038] A second support plate is provided at the lower front portion of the hanging plate 1, and a second bearing is provided on the second support plate. The positioning shaft 7 is matched with the second bearing. The positioning shaft 7 passes through the arc guide groove 10-2 and is matched with it.

[0039] The lateral positioning mechanism is mounted on the second support plate, and the end thereof is adapted to engage with the positioning hole 10-1. In this embodiment, the lateral positioning mechanism is a screw ball 6. The screw balls 6 are arranged in pairs on the left and right sides, and their ball heads can be snapped into the positioning holes 10-1 on the corresponding sides of the positioning plate 10.

[0040] When adjusting the working angle of the calibration plate 5, the transmission shaft 3 is rotated by the hand wheel 2, the ball head of the screw ball 6 is retracted under the action of the positioning hole 10-1, the internal spring is compressed, and the positioning plate 10 rotates. At this time, the angle of the calibration plate 5 relative to the hanging plate 1 is changed by the relative sliding of the arc guide groove 10-2 and the positioning shaft 7. After reaching the specified working angle, the ball head of the screw ball 6 is ejected by the internal spring and is locked into the corresponding positioning hole 10-1, and the adjustment is completed. Figures 6 to 8 In this embodiment, adjustment of three working angles can be achieved. Example 2

[0041] The difference between this embodiment and the first embodiment is that the transmission shaft and the positioning plate are installed on one side of the hanging plate, while the positioning shaft and the screw ball are located on the side of the calibration plate. The rest of the structure is the same as the first embodiment and will not be described here.

[0042] It should be noted that it is obvious to those skilled in the art that the present invention is not limited to the details of the above exemplary embodiments, and that the present invention can be implemented in other specific forms without departing from the spirit or essential features of the present invention. The scope of the present invention is defined by the claims rather than the above description.

Claims

1. A millimeter wave radar calibration device, comprising a hanging plate (1), a calibration plate (5) and a laser emitter (4), wherein the hanging plate (1) is rotatably connected to the calibration plate (5), the axis of the rotation connection being horizontally arranged left and right, and the laser emitter (4) being mounted on the calibration plate (5), characterized in that: It also includes a transmission shaft (3), a positioning plate (10), a positioning shaft (7) and a transverse positioning mechanism; The transmission shaft (3) is horizontally arranged left and right and is mounted on the first base body by a rotational connection. The positioning plate (10) is fixedly mounted on the transmission shaft (3) and a circular arc guide groove (10-2) is provided on the positioning plate (10). The positioning shaft (7) is mounted on the second base body and matches the circular arc guide groove (10-2). The transverse positioning mechanism is mounted on the second base body and the end thereof is used to match the positioning hole (10-1) provided on the positioning plate (10). The calibration plate (5) is a first base and the hanging plate (1) is a second base, or the hanging plate (1) is a first base and the calibration plate (5) is a second base.

2. The millimeter-wave radar calibration device according to claim 1, wherein: The positioning hole (10-1) is located outside the circular arc guide groove (10-2).

3. The millimeter wave radar calibration device according to claim 1, wherein: The lateral positioning mechanism is a screw ball (6).

4. The millimeter wave radar calibration device according to claim 1, wherein: The positioning shaft (7) is mounted on the second base body by a rotational connection.

5. The millimeter wave radar calibration device according to claim 1, wherein: When the calibration plate (5) is the first base and the hanging plate (1) is the second base, a first support plate is provided on the upper front side of the hanging plate (1), a first bearing is mounted on the first support plate, and a rotating connecting shaft (11) is mounted on the upper rear side of the calibration plate (5), the rotating connecting shaft (11) being matched with the first bearing.

6. The millimeter wave radar calibration device according to claim 5, wherein: A second support plate is provided at the lower front portion of the hanging plate (1), a second bearing is provided on the second support plate, and the positioning shaft (7) cooperates with the second bearing.

7. The millimeter wave radar calibration device according to any one of claims 1 to 6, characterized in that: A hand wheel (2) is mounted on the end of the transmission shaft (3).

8. The millimeter wave radar calibration device according to claim 7, wherein: The hand wheels (2) are mounted on both left and right ends of the transmission shaft (3).

9. The millimeter wave radar calibration device according to any one of claims 1 to 6, characterized in that: The top of the hanging plate (1) is provided with a hanging hole (1-1).

10. The millimeter wave radar calibration device according to any one of claims 1 to 6, characterized in that: The calibration plate (5) is provided with a first level bubble (8) arranged along the left-right direction and a second level bubble (9) arranged along the front-back direction.

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