Compact Galvanometer Motor Layout for Space-Constrained LiDAR
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Solution Overview
Problem
Existing galvanometer motors used in LiDAR systems have a large outer diameter, leading to a bulky LiDAR that is not suitable for installation in vehicles or other space-constrained devices.
Innovation Solution
A compact galvanometer motor design is proposed, which includes a rotor assembly with a shell, rotating shaft, and magnetic pole, along with a fixing structure that includes a stator assembly, mounting sleeve, and base, and an angular position sensor that detects the angular position of the rotor assembly. This design reduces the outer diameter of the galvanometer motor and LiDAR by locating parts of the fixing structure and angular position sensor outside the shell.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If the galvanometer motor uses a conventional design with all components housed inside the shell, then the structural integrity and protection of components is improved, but the outer diameter and volume of the motor become too large for installation in space-constrained devices
Solution Approach 1:
The galvanometer motor is divided into distinct functional modules: the rotor assembly housed in the shell, the stator assembly mounted on the mounting sleeve, and the angular position sensor mounted on the base. This segmentation allows each component to be optimized independently and assembled in a compact configuration, reducing the overall volume while maintaining structural integrity through proper modular connection.
Solution Approach 2:
The mounting sleeve extends axially from the shell to provide a mounting surface for the stator assembly outside the shell's radial envelope. Similarly, the base extends from the mounting sleeve to mount the angular position sensor. This axial extension utilizes the length dimension rather than increasing radial dimensions, thereby reducing the outer diameter and volume of the motor.
2Measurement precision
If the angular position sensor is mounted inside the shell, then the component protection is improved, but the sensing accuracy and trigger alignment become difficult to achieve
Solution Approach 1:
The angular position sensor is extracted from the interior of the shell and mounted on the exterior base. The trigger is mounted on the second end of the shell and extends toward the sensor. This extraction allows the sensor to be positioned at an optimal distance and alignment for accurate angular detection, while the base provides a stable mounting platform outside the rotating shell assembly.
3Power
If the stator assembly is mounted inside the shell, then the magnetic field generation is effective, but the outer diameter of the motor increases
Solution Approach 1:
The stator assembly is mounted on the mounting sleeve which extends axially from the shell, positioning the stator outside the radial envelope of the shell. This axial mounting arrangement allows the stator to generate the necessary magnetic field for motor operation while not increasing the outer diameter of the motor, thereby maintaining compact dimensions.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The compact design reduces the outer diameter and volume of the galvanometer motor and LiDAR, enabling their installation in devices with limited space while maintaining the necessary performance for LiDAR applications.
Implementation Method 1
the stator assembly being used to generate a rotating magnetic field for driving the magnetic pole to rotate
Data Source
AI summary
The present application provides a galvanometer motor and a LiDAR. The galvanometer motor includes a rotor assembly, a fixing structure, and an angular position sensor. The rotor assembly includes a shell, a rotating shaft, and a magnetic pole. The fixing structure includes a stator assembly, a mounting sleeve, and a base. The mounting sleeve is partially located inside the shell and partially extends to the outside of the shell through an opening. The mounting sleeve is movably socketed with the rotating shaft. The stator assembly is mounted on the outside of the mounting sleeve inside the shell. The stator assembly is used to generate a rotating magnetic field for driving the magnetic pole to rotate.