Planar-Beam LiDAR Scanning for Lower-Complexity Hazard Detection
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Solution Overview
Problem
Current LIDAR systems for autonomous vehicles require numerous fixed beams to achieve safe operation at high speeds, leading to increased power consumption, processing complexity, and cost, which becomes impractical for widespread deployment.
Innovation Solution
A planar-beam LIDAR system that uses a single laser scanner emitting a two-dimensional beam plane and a detector array with adjustable photodetectors, reducing the need for multiple beams by transmitting a single beam plane at a lower pulse rate while maintaining data quality.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the number of laser beams is increased to maintain hazard detection granularity at high speeds, then the safety and detection capability are improved, but the power consumption, processing complexity, and cost increase significantly
Solution Approach 1:
The patent transitions from traditional point-by-point or line-by-line LIDAR scanning to a planar beam approach, where a single laser beam is expanded into a two-dimensional plane that covers a wide field of view simultaneously. This dimensional change allows the system to detect hazards across the entire field of view with a single beam, eliminating the need for multiple beams while maintaining comprehensive detection capability at high speeds.
2Reliability
If the number of laser beams is increased to maintain hazard detection granularity at high speeds, then the safety and detection capability are improved, but the processing complexity and system cost increase
Solution Approach 1:
The patent merges the functions of multiple LIDAR beams into a single planar beam. Instead of processing data from multiple separate beams that require complex synchronization and integration, the system uses one planar beam that inherently provides comprehensive spatial coverage. This merging simplifies the processing architecture by eliminating the need to coordinate and integrate data from multiple beam sources, reducing computational complexity while maintaining detection granularity.
3Measurement precision
If the number of laser beams and photodetectors is increased, then the detection precision and coverage are improved, but the space requirements and manufacturing cost increase
Solution Approach 1:
The patent implements a universal photodetector array that can detect light from the entire planar beam simultaneously. Instead of requiring dedicated photodetectors for each beam, a single array serves multiple functions: detecting reflected light across the full field of view, maintaining detection precision, and enabling high-speed operation. This multi-functionality reduces the total number of photodetectors needed while preserving measurement precision and reducing manufacturing complexity.
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 planar-beam LIDAR system reduces the complexity and cost of LIDAR systems while maintaining data quality, enabling safer and more efficient operation of autonomous vehicles by decreasing the number of beams required for hazard detection and processing demands.
Implementation Method 1
a laser scanner that emits a planar-beam
Implementation Method 2
a collimation component that collimates a laser beam generated by the laser scanner into the planar beam
Implementation Method 3
a detector array to detect reflected light (e.g., backscatter) from the planar beam
Data Source
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AI summary
A planar-beam, light detection and ranging (PLADAR) system can include a laser scanner that emits a planar-beam, and a detector array that detects reflected light from the planar beam.