LiDAR Galvanometer With Meandering Bending Axis for Large Scan Angles
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Solution Overview
Problem
The increased demand for larger scanning field of view and longer detection ranges in LiDAR systems puts strain on galvanometers, leading to greater structural stress and reduced reliability due to larger torsion angles.
Innovation Solution
The galvanometer design incorporates a bending axis with a meandering structure, comprising multiple segments, including straight and curved segments, to increase length without reducing the reflector area, thereby reducing structural stress.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the galvanometer is designed to provide larger torsion angles for larger scanning field of view and longer detection ranges, then the scanning performance is improved, but the structural stress on the axis increases, reducing reliability
Solution Approach 1:
The patent applies curvature to the axis structure by designing a bending axis with multiple segments (first segment, second segment, third segment) that form curved paths rather than straight lines. This curved configuration increases the effective length of the axis without increasing the overall device footprint, thereby reducing structural stress while maintaining the required torsion angle capability for large scanning fields of view.
Solution Approach 2:
The axis is divided into multiple segments (first segment, second segment, third segment) that are connected in sequence. This segmentation allows the axis to achieve a longer effective length through curved routing while maintaining structural integrity. Each segment can be optimized independently, and the segmented structure better distributes the mechanical stress throughout the axis length, reducing peak stress concentrations.
2Reliability
If the length of the axis is increased to reduce structural stress, then the reliability is improved, but the device complexity increases
Solution Approach 1:
The axis is divided into multiple segments (first segment, second segment, third segment) that are connected in sequence. This segmentation allows the axis to achieve a longer effective length through curved routing while maintaining structural integrity. Each segment can be optimized independently, and the segmented structure better distributes the mechanical stress throughout the axis length, reducing peak stress concentrations.
Solution Approach 2:
The patent applies curvature to the axis structure by designing a bending axis with multiple segments (first segment, second segment, third segment) that form curved paths rather than straight lines. This curved configuration increases the effective length of the axis without increasing the overall device footprint, thereby reducing structural stress while maintaining the required torsion angle capability for large scanning fields of view.
Data Source
AI summary
The present application provides a galvanometer and a LiDAR. The galvanometer includes: a fixed base, the fixed base having a first hollow area; a support frame, where the support frame is arranged in the first hollow area, the support frame is connected to the fixing seat through a first axis, and the support frame is provided with a second hollow area; and a reflector, where the reflector is arranged in the second hollow area, and the reflector is connected to the support frame through a second axis. At least one of the first axis and the second axis is a bending axis.