Adjustable LiDAR System for Dynamic Object Detection
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Summary
Problems
Conventional scanning LiDAR systems with fixed angles perform poorly when the vehicle's orientation changes relative to the road, such as when driving on hills or bumps, as they fail to effectively detect objects and obstacles in varying directions.
Innovation solutions
An adjustable LiDAR system with a rotatable mirror assembly comprising multiple mirror segments of different orientations and shapes, allowing dynamic adjustment of scan patterns by controlling the timing of laser light transmission and sensor sampling to adapt to changing vehicle orientations.
TRIZ Analysis
Specific contradictions:
General conflict description:
Principle concept:
If a fixed angle scanning pattern is used, then the LiDAR system structure is simple and stable, but the object detection performance deteriorates when vehicle orientation changes relative to the road
Why choose this principle:
The patent applies the dynamics principle by making the LiDAR scanning pattern adjustable and adaptable to different vehicle orientations. The system dynamically changes scan patterns based on detected road conditions and vehicle attitude, transitioning from fixed to variable angle scanning. This allows the LiDAR to maintain optimal detection performance whether the vehicle is on level ground, ascending a hill, or descending, directly resolving the contradiction between detection reliability and adaptability to orientation changes.
Principle concept:
If multiple mirror segments with different orientations are used, then the adaptability to varying directions is improved, but the device complexity increases
Why choose this principle:
The patent applies segmentation by dividing the mirror assembly into multiple discrete mirror segments, each with a different fixed orientation. This segmentation allows the system to achieve multiple scan patterns by selectively activating different segments or combinations of segments, rather than requiring a fully continuous adjustable mirror. The segmented approach provides the necessary adaptability while keeping the mechanical structure manageable and the control logic discrete.
Application Domain
Data Source
AI summary:
An adjustable LiDAR system with a rotatable mirror assembly comprising multiple mirror segments of different orientations and shapes, allowing dynamic adjustment of scan patterns by controlling the timing of laser light transmission and sensor sampling to adapt to changing vehicle orientations.
Abstract
In some examples, a system comprises a laser light source and a rotatable mirror assembly comprising a plurality of mirror segments, the rotatable mirror assembly aligned to reflect light transmitted by the laser light source, wherein the plurality of mirror segments comprise a first segment that reflects a first light beam from the laser light source in a first direction, and a second mirror segment that reflects the first light beam from the laser light source in a second direction, different from the first direction. In some examples, the system comprises a light sensor positioned to receive light reflected from the rotatable mirror assembly. In some examples, the system comprises a motor for rotating the mirror assembly about a rotation axis. In some examples, the system comprises a controller for controlling a sampling phase of sampling the light sensor.