Laser radar rotating mirror structure

Abstract

The utility model discloses a laser radar rotating mirror structure which comprises a brushless motor stator, a brushless motor rotor and a PCB, one end of the brushless motor stator is used for being fixed with a laser radar outer cover, the other end of the brushless motor stator is provided with the brushless motor rotor, and the PCB is fixedly arranged on the brushless motor stator and located between the brushless motor stator and the brushless motor rotor. A coded disc is integrally arranged on the brushless motor rotor, a photoelectric encoder is arranged on the PCB, and the coded disc and the photoelectric encoder are matched in position. According to the laser radar rotating mirror structure, the connecting piece used for being connected with the outer cover is arranged to be the brushless motor stator, the split type coded disc is arranged to be of a structure integrated with the brushless motor rotor, the photoelectric encoder is arranged to be longitudinally arranged, the integration degree of the laser radar rotating mirror structure is improved through the improvement, and the stability of the rotating mirror structure is also improved.

Description

Technical Field

[0001] The utility model relates to the field of laser radar, in particular to a laser radar rotating mirror structure. Background Art

[0002] As a radar device, lidar offers advantages such as high precision, strong anti-interference capabilities, and fast response times, making it suitable for a variety of environments. As described above, lidar emits a laser beam as a detection signal into the surrounding three-dimensional space. The laser beam then reflects off objects in the surrounding space, returning as an echo signal. The lidar compares the received echo signal with the transmitted detection signal to obtain relevant information about surrounding objects, such as distance and speed.

[0003] For existing rotating mirror laser radars, the components of the rotating mirror structure have low integration and poor stability, which prevents the application range of rotating mirror laser radars from being expanded.

[0004] Therefore, it is necessary to provide a laser radar with a new rotating mirror structure to solve the problems of low component integration and poor stability. Utility Model Content

[0005] The laser radar rotating mirror structure disclosed in the utility model has a high degree of integration, which solves the problems of low integration and poor stability of rotating mirror radars.

[0006] The technical solution adopted by the utility model is specifically: a laser radar rotating mirror structure, including a brushless motor stator, a brushless motor rotor, and a PCB board. One end of the brushless motor stator is used to be fixed to the laser radar housing, and the other end is provided with the brushless motor rotor. The PCB board is fixedly mounted on the brushless motor stator and located between the brushless motor stator and the brushless motor rotor. The brushless motor rotor is integrally provided with a code disk, and the PCB board is provided with a photoelectric encoder. The code disk and the photoelectric encoder are positioned in a matching manner.

[0007] As an optional solution of the technical solution of the present utility model, the tooth surface of the code disk is perpendicular to the rotation plane of the brushless motor, and the photoelectric encoder is arranged vertically.

[0008] As an optional solution of the technical solution of the present utility model, the laser radar rotating mirror structure also includes a reflector, which is arranged on the brushless motor rotor and inclined at 45° to the horizontal plane.

[0009] As an optional solution of the technical solution of the present utility model, a light guide tube is provided in the middle of the reflector, and the two ends of the light guide tube are perpendicular to each other and form an angle of 45° with the reflector.

[0010] The beneficial effects achieved by the present invention are: the connecting piece for connecting with the outer cover is set as the stator of the brushless motor, the split code disk is set as a structure integrated with the brushless motor rotor, and the photoelectric encoder is set to a vertical layout. The above improvements improve the integration of the laser radar rotating mirror structure and also improve the stability of the rotating mirror structure. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 It is a schematic diagram of the overall structure of the laser radar rotating mirror according to the present utility model.

[0012] Figure 2 The figure is a schematic diagram of the structure of the laser radar rotating mirror rotor according to the utility model.

[0013] Among them, 100-brushless motor stator; 200-brushless motor rotor; 210-code disk; 300-PCB board; 310-photoelectric encoder; 400-reflector; 500-light guide tube. DETAILED DESCRIPTION

[0014] In order to make the technical problems, technical solutions, and beneficial effects solved by the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the following specific embodiments are only intended to explain the present invention and are not intended to limit the present invention. Based on the following embodiments, all other embodiments obtained by persons of ordinary skill in the art without creative effort are intended to fall within the scope of protection of the present invention.

[0015] It should be noted that in the description of the present invention, the terms "up", "down", "left", "right", "front", "back", etc. indicating directions or positional relationships are based on the directions or positional relationships in the accompanying drawings, and are only simplified descriptions for the convenience of describing the present invention, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction. Therefore, they cannot be understood as limitations on the present invention.

[0016] In the description of the embodiments, unless otherwise specified or limited, the terms "disposed" and "connected" should be understood broadly. For example, they can refer to fixed, removable, or integral connections; mechanical or electrical connections; direct connections, connections through an intermediary medium, or internal communication between two components. Those skilled in the art will understand the specific meanings of these terms in this utility model based on their specific circumstances.

[0017] like Figure 1The schematic diagram of the overall structure of the laser radar rotating mirror is shown in the figure. From top to bottom, it includes the brushless motor stator 100, PCB board 300, brushless motor rotor 200 and light guide tube 500. The top of the brushless motor stator 100 is used to fix to the laser radar housing, the bottom periphery is provided with the PCB board 300, and the bottom inner side is provided with the brushless motor rotor 200. Figure 2 The schematic diagram of the LiDAR rotating mirror rotor structure shows a code disk 210 mounted on the brushless motor rotor 200. Code disk 210 and the brushless motor rotor 200 are integrally formed, with the tooth surface of code disk 210 positioned vertically, perpendicular to the rotation plane of the brushless motor rotor 200. A photoelectric encoder 310 is mounted on the PCB 300. This photoelectric encoder 310 is positioned vertically, matching the position of code disk 210. The photoelectric encoder 310 and code disk 210 work together to measure the rotating mirror's rotational speed and angle.

[0018] like Figure 1 As shown, a reflector 400 is disposed at the bottom of the brushless motor rotor 200, tilted at a 45° angle to the horizontal. A light guide 500 is disposed in the middle of the reflector 400, with both ends of the light guide 500 perpendicular to each other and forming a 45° angle with the reflector 400. When the brushless motor drives the reflector 400 and light guide 500 to rotate, the reflector 400's rotation axis is a vertical axis passing through the center point of the reflector 400, while the light guide 500's rotation axis is a vertical axis that coincides with the center axis of the vertical portion of the light guide 500.

[0019] To sum up, the top of the brushless motor stator 100 is directly fixed to the laser radar cover, which reduces the previously commonly used connecting components; secondly, the code disk 210 is designed as an integral whole with the brushless motor rotor 200. Compared with the assembled structure, the code disk 210 has higher stability after long-term rotation; the tooth surface of the code disk 210 is vertically arranged and the photoelectric encoder 310 is arranged vertically. Compared with the previously commonly used horizontal layout, the overall volume is reduced and the integration of the laser radar rotating mirror structure is improved.

[0020] Next, this embodiment will be further explained by describing in detail the working principle of the laser radar rotating mirror structure described in this embodiment.

[0021] First, a laser emitter emits laser light, which enters the light guide 500 vertically from bottom to top. After being reflected by the reflector 400, the laser light is emitted horizontally from the light guide 500. The laser light is then reflected by the object and strikes the reflector 400. After being reflected by the reflector 400, it is received by the laser receiver. As the brushless motor drives the reflector 400 to rotate, the laser light can be emitted and received in all directions, completing a 360° scan.

[0022] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention shall be included within the scope of protection of the present invention. In addition, the technical solutions of the various embodiments may be combined with each other, but this must be based on the fact that they can be implemented by a person of ordinary skill in the art. If the combination of technical solutions is inconsistent or cannot be implemented, it shall be deemed that such combination of technical solutions does not exist and is not within the scope of protection claimed by the present invention.

Claims

1. A laser radar rotating mirror structure, characterized in that: include: A brushless motor stator, one end of which is used to be fixed to the lidar housing, and the other end of which is provided with a brushless motor rotor; The PCB board is fixedly mounted on the stator of the brushless motor and is located between the stator and the rotor of the brushless motor; A code disk is integrally provided on the brushless motor rotor, and a photoelectric encoder is provided on the PCB board. The positions of the code disk and the photoelectric encoder match each other.

2. The laser radar rotating mirror structure according to claim 1, characterized in that: The tooth surface of the code disc is perpendicular to the rotation plane of the brushless motor, and the photoelectric encoder is arranged vertically.

3. The laser radar rotating mirror structure according to claim 1, wherein: The invention also includes a reflector, which is arranged on the brushless motor rotor and is inclined at 45 degrees to the horizontal plane.

4. The laser radar rotating mirror structure according to claim 3, characterized in that: A light guide tube is provided in the middle of the reflector, and two ends of the light guide tube are perpendicular to each other and form an angle of 45 degrees with the reflector.

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