LiDAR Light Source Orientation Calibration
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Solution Overview
Problem
Current LiDAR systems face inefficiencies and inaccuracies in object detection due to interference and complex processing in solid-state systems, and require a clean environment and precise operation in mechanical systems, limiting their reliability, accuracy, and efficiency in various environmental conditions.
Innovation Solution
A light detection and ranging system is optimized by coupling a light source to a polygon reflector with a plurality of facets, where a controller generates and executes a calibration strategy to alter the orientation of the light source based on the position of the facets, allowing precise correlation of return photons with target positions and movements.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If solid-state LiDAR systems are used, then compact form factor is achieved, but interference and complex processing occur leading to reduced accuracy
Solution Approach 1:
The system segments the detection process into distinct phases: calibration phase where reference surfaces are mapped to establish precise geometric relationships, and operation phase where objects are detected using the pre-established calibration data. This segmentation allows the compact solid-state design to achieve high precision by preparing accurate reference frameworks in advance.
Solution Approach 2:
The system performs preliminary calibration actions before actual object detection. During calibration, the light source is directed at known reference surfaces to map their positions and orientations, storing this geometric information for later use. This preliminary mapping eliminates the need for complex real-time processing during detection, improving both accuracy and reducing interference.
2Measurement precision
If mechanical LiDAR systems are used, then detection accuracy is improved, but clean environment and precise operation are required reducing reliability
Solution Approach 1:
The patent replaces mechanical scanning systems with a solid-state light source that can be electronically controlled to emit light in different directions. The polygon reflector is driven by a motor to rotate and direct light beams, combining mechanical simplicity with electronic control for reliable operation in various environmental conditions without requiring clean environments.
Solution Approach 2:
The system changes operational parameters by using calibration data to adjust the interpretation of return photons. By establishing reference relationships during calibration between light source orientation and facet positions, the system can accurately determine object positions under varying operational conditions without requiring pristine environmental conditions or extremely precise mechanical operation.
3Measurement precision
If calibration strategy is implemented to alter light source orientation, then accuracy is improved, but processing time increases
Solution Approach 1:
The calibration strategy is executed as a preliminary action before actual object detection. During calibration, the system maps reference surfaces and establishes the relationship between light source orientations and polygon reflector facet positions. This pre-established geometric framework is stored and reused during detection, eliminating the need for repeated calibration processing and reducing time loss.
Solution Approach 2:
The system uses the calibration data it generates to automatically correct and improve its own detection accuracy. The stored reference information about surface positions and orientations enables the system to self-correct detection results without requiring external calibration or additional processing time during operation.
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
This approach enhances the reliability, accuracy, and efficiency of object detection and ranging by improving the calibration and operation of the LiDAR system, enabling accurate identification of objects in diverse environmental conditions while maintaining a compact form factor.
Implementation Method 1
coupling a light source to a polygon reflector having a plurality of facets
Implementation Method 2
The ability to utilize multiple light frequencies and/or beams concurrently allows LiDAR systems to provide robust volumes of information
Data Source
AI summary
A light detection and ranging system can have a light source coupled to a polygon reflector having a plurality of facets. A controller can be connected to the light source and directed to generate and execute a calibration strategy that alters an orientation of the light source in response to identification of a position of at least one facet of the plurality of facets.