Special high-precision rotating assembly for laser radar
By employing a combination of brushless DC motor, encoder, and code disk in the lidar, the problem of inaccurate rotation angle measurement was solved, achieving high-precision rotation control and laser scanning, and improving the overall measurement accuracy of the lidar.
Patent Information
- Application Number
- CN202423111147.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-17
- Publication Date
- 2025-12-05
- Estimated Expiration
- 2034-12-17
AI Technical Summary
Existing lidar has limited accuracy in measuring rotation angles, leading to inaccurate measurements and inconsistent cycles, which affects the overall measurement accuracy.
It employs a high-precision rotating component, including a combination of a brushless DC motor, encoder, code disk, and photoelectric switch. The encoder controls the motor speed, and the combination of the code disk's tooth structure and photoelectric switch detection enables precise angle and speed measurement. Laser scanning is achieved through a reflector and a light guide tube.
It achieves high-precision rotation control and laser scanning of lidar, ensuring the accuracy of rotation speed and angle measurement and improving the overall measurement accuracy.
Smart Images
Figure CN223637718U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model belongs to sensor technical field, concretely relates to a high accuracy rotating assembly special for laser radar. BACKGROUND
[0002] The rotating assembly is an important part in the laser radar, and is a key link in the radar scanning. The laser radar needs to rotate continuously in the working process, and the detection laser is projected to the surroundings. Therefore, the radar needs to realize high-precision angle measurement, and further obtain the functions of rotation speed and acceleration. In the actual use scene of the laser radar, the design and subsequent installation defects result in limited measurement accuracy of the rotating angle of the radar, and the precise control cannot be realized. Various problems such as inaccurate measurement and non-fixed cycle are caused, and the overall measurement accuracy of the laser radar is affected. SUMMARY
[0003] In view of the problems in the above background technology, the utility model aims to provide a high-precision rotating assembly special for laser radar.
[0004] To achieve the above technical purpose, the utility model adopts the following technical scheme:
[0005] A high-precision rotating assembly special for laser radar, comprising a shell, an installation groove is arranged on the inner wall of the shell, a motor fixing seat is arranged on the inner bottom of the shell, a support is integrally connected to the motor fixing seat, the support is located in the installation groove, an encoder is arranged on the support, and the encoder is located in the installation groove.
[0006] The motor fixing seat is provided with a brushless DC motor, the brushless DC motor is signal-connected with the encoder, a code disc is arranged on the output end of the brushless DC motor, the encoder is provided with a photoelectric switch, the code disc is matched with the reading end of the photoelectric switch, a rotating base is arranged on the code disc, a light guide cylinder is arranged on the rotating base, a reflecting mirror is arranged between the rotating base and the light guide cylinder, and a through hole is arranged at the turning point of the light guide cylinder.
[0007] Further limited, the rotating base is provided with two insertion holes, the light guide cylinder is connected with an insertion column corresponding to the insertion holes in the number of specifications, and the insertion column is inserted into the insertion hole to realize the installation of the light guide cylinder, which is simple, fast, convenient, beneficial to disassembly, replacement and maintenance, and can ensure that the overall structure is coaxial.
[0008] Further limited, the rotating base is provided with a groove, and the reflecting mirror is located in the groove, which can realize the rapid positioning of the reflecting mirror and is beneficial to disassembly and replacement.
[0009] Further limited, the motor fixed seat is fixed in the shell interior through screw, such design guarantees installation strength.
[0010] Further limited, the code disc is metal material, the light guide cylinder and the rotating base are engineering plastics, the shell is transparent resin, such design, metal code disc guarantees strength, is not easy to deform, the light guide cylinder and the rotating base adopt engineering plastics and benefit integral injection molding, have the strength while low cost, the transparent shell guarantees the light transmittance.
[0011] The beneficial effects of the utility model are as follows:
[0012] The utility model discloses a motor rotation, angular velocity measurement in an organic whole, can realize multifunctional accurate control, can accurately obtain the current rotation speed of brushless DC motor under the cooperation of encoder and code disc, and further realizes accurate control to motor speed.
[0013] The structure design of the utility model can be applied to rotary laser radar, as part of radar assembly, projects detection laser to the environment around, realizes the scanning function of radar. BRIEF DESCRIPTION OF DRAWINGS
[0014] The utility model can be further illustrated by the non-limiting embodiment shown in the drawings.
[0015] Figure 1 It is the structure diagram of a laser radar special high-precision rotating assembly embodiment of the utility model;
[0016] Figure 2 It is the cross-sectional structure diagram of a laser radar special high-precision rotating assembly embodiment of the utility model;
[0017] Figure 3 It is the internal structure diagram of a laser radar special high-precision rotating assembly embodiment of the utility model;
[0018] The main element symbol is explained as follows:
[0019] Shell 1, mounting groove 2, motor fixed seat 3, support 4, encoder 5, brushless DC motor 6, code disc 7, rotating base 8, light guide cylinder 9, reflector 10, through-hole 11.
[0020] Photoelectric switch 51, jack 81, recess 82, plug post 91. DETAILED DESCRIPTION
[0021] In order to make those skilled in the art can better understand the utility model, the utility model technical scheme is further explained below in conjunction with the drawings and examples.
[0022] As Figure 1 ,Figure 2 、 Figure 3 The utility model discloses a high-precision rotating assembly special for laser radar, including shell 1, the inner wall of shell 1 is equipped with the mounting groove 2, and the bottom of shell 1 is installed motor fixed base 3, and the motor fixed base 3 is integrally connected with support 4, and the support 4 is located in the inside of mounting groove 2, and the support 4 is installed encoder 5, and the encoder 5 is located in the inside of mounting groove 2.
[0023] The motor fixed base 3 is installed brushless DC motor 6, and the brushless DC motor 6 is connected with encoder 5 signal, and the brushless DC motor 6 output end is installed code disc 7, and the encoder 5 is installed photoelectric switch 51, and the code disc 7 is matched with the reading end of photoelectric switch 51, and the code disc 7 is installed rotating base 8, and the rotating base 8 is installed light guide tube 9, and the reflecting mirror 10 is installed between rotating base 8 and light guide tube 9, and the turning point of light guide tube 9 is equipped with through -hole 11.
[0024] In the embodiment, when using a high-precision rotating assembly special for laser radar, the encoder 5 controls the rotation of the brushless DC motor 6, controls its speed, and cooperates with the code disc 7 for use. The code disc has 70 teeth of the same size and equal spacing, and a 10° non-hole area as the code disc origin. The brushless DC motor 6 drives the code disc 7 to rotate after starting, and the photoelectric switch 51 on the encoder 5 detects the teeth on the code disc 7. When the gap between the teeth passes through the photoelectric switch 51, the rotational angular velocity of the code disc 7 can be obtained, and the current angle and acceleration of the code disc 7 can be calculated.
[0025] It should be noted that the relative positions of the brushless DC motor 6, the code disc 7, and the rotating base 8 should be paid special attention during installation to ensure that the overall structure is coaxial.
[0026] After installation, the encoder 5 is powered on at the same time as the brushless DC motor 6 is driven, and the brushless DC motor 6 drives the reflecting mirror 10 and the light guide tube 9 to rotate, and cooperates with the optical signal transceiver system to form a laser scanner.
[0027] Preferably, the rotating base 8 has two insertion holes 81, and the light guide tube 9 is connected with insertion columns 91 corresponding in size, number, and position. This design allows the insertion columns 91 to be inserted into the insertion holes 81 to achieve the installation of the light guide tube 9, which is simple, fast, and convenient for disassembly, replacement, and maintenance, and ensures that the overall structure is coaxial. In fact, the quick installation and positioning structure of the light guide tube 9 can also be considered according to specific conditions.
[0028] Preferably, the rotating base 8 has a groove 82, and the reflecting mirror 10 is located in the groove 82. This design allows the reflecting mirror 10 to be quickly positioned while being easy to disassemble and replace. In fact, the installation and positioning structure of the reflecting mirror 10 can also be considered according to specific conditions.
[0029] The motor fixing base 3 is preferably fixed in the shell 1 by screws, which ensures the installation strength, and in fact, the installation structure of the motor fixing base 3 can be considered according to specific conditions.
[0030] The code disc 7 is preferably made of metal, the light guide cylinder 9 and the rotating base 8 are both made of engineering plastics, and the shell 1 is made of transparent resin, which ensures the strength of the metal code disc and prevents deformation, the engineering plastics of the light guide cylinder 9 and the rotating base 8 are beneficial to integral injection molding, have strength and are low in cost, and the transparent shell ensures the light transmission, and in fact, the material selection of the shell 1, the code disc 7, the rotating base 8 and the light guide cylinder 9 can be considered according to specific conditions.
[0031] The above embodiments only exemplarily illustrate the principle and effects of the utility model, and are not used for limiting the utility model. Any person skilled in the art can modify or change the above embodiments without departing from the spirit and category of the utility model. Therefore, all equivalent modifications or changes completed by those skilled in the art without departing from the spirit and technical thought disclosed by the utility model should be covered by the claims of the utility model.
Claims
1. A high precision rotating assembly dedicated for lidar, comprising a housing (1), characterized in that: The inner wall of the shell (1) is provided with a mounting groove (2), the inner bottom of the shell (1) is provided with a motor fixing seat (3), the motor fixing seat (3) is integrally connected with a support (4), the support (4) is located in the mounting groove (2), the support (4) is provided with an encoder (5), and the encoder (5) is located in the mounting groove (2); The motor fixing seat (3) is provided with a brushless DC motor (6), the brushless DC motor (6) is signal connected with the encoder (5), the output end of the brushless DC motor (6) is provided with a code disc (7), the encoder (5) is provided with a photoelectric switch (51), the code disc (7) is matched with the reading end of the photoelectric switch (51), the code disc (7) is provided with a rotating base (8), the rotating base (8) is provided with a light guide cylinder (9), a reflecting mirror (10) is arranged between the rotating base (8) and the light guide cylinder (9), and a through hole (11) is arranged at the turning point of the light guide cylinder (9).
2. A high precision rotating assembly for lidar applications as claimed in claim 1, wherein: The rotating base (8) is provided with two insertion holes (81), the light guide cylinder (9) is connected with an insertion column (91) corresponding to the insertion holes (81) in number and position.
3. A high precision rotating assembly for lidar applications as claimed in claim 2, wherein: The rotating base (8) is provided with a recess (82), and the reflecting mirror (10) is located in the recess (82).
4. A high precision rotating assembly for lidar applications as claimed in claim 3, wherein: The motor fixing seat (3) is fixed in the shell (1) by screws.
5. A high precision rotating assembly for lidar applications as claimed in claim 4, wherein: The code disc (7) is made of metal, the light guide cylinder (9) and the rotating base (8) are made of engineering plastics, and the shell (1) is made of transparent resin.