Steered LIDAR Arrayed Receiver Adaptive Scanning
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Solution Overview
Problem
LIDAR systems face limitations in achieving a balance between spatial resolution, range, and cost, with flash systems offering high spatial resolution at low cost but limited range and narrow field of view, while mechanical spinning systems provide 360-degree coverage and long range but are costly, unreliable, and have low spatial resolution.
Innovation Solution
A steered LIDAR system with an arrayed receiver that emits a scanning pulsed fanned laser beam, using a transmit module with scanning mirrors to adjust the field of view and receive module with an arrayed receiver to capture reflected light, allowing for two-dimensional scanning and adaptive control of angular extents and pulse parameters to optimize range and resolution.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If flash LIDAR systems are used, then spatial resolution is improved, but range is limited
Solution Approach 1:
The system segments the field of view into multiple regions and uses an arrayed receiver with multiple photodetectors to simultaneously detect photons from different spatial zones. This segmentation allows the system to maintain high spatial resolution across the entire field of view while extending the effective range by distributing detection capabilities across multiple channels.
Solution Approach 2:
The patent transitions from a single-point detection approach to a two-dimensional arrayed receiver structure. By adding spatial dimensionality to the detection system through multiple photodetectors arranged in an array, the system achieves both high spatial resolution and extended range simultaneously, overcoming the fundamental limitation of conventional flash LIDAR.
2Length of moving object
If mechanical spinning systems are used, then range is extended, but spatial resolution deteriorates
Solution Approach 1:
The system replaces the mechanical spinning mirror with a non-mechanical approach using electronic beam steering and an arrayed receiver. This substitution eliminates the need for moving parts while achieving both long range detection and high spatial resolution through coordinated electronic control of multiple photodetectors, directly addressing the resolution limitations of mechanical spinning systems.
3Adaptability or versatility
If mechanical spinning systems are used, then 360-degree coverage is achieved, but reliability decreases
Solution Approach 1:
The patent replaces mechanical spinning components with a stationary arrayed receiver system that achieves 360-degree coverage through electronic beam steering and multiple detection channels. This eliminates mechanical wear and failure points, significantly improving system reliability while maintaining full angular coverage capability.
4Length of moving object
If mechanical spinning systems are used, then long range sensing is achieved, but cost increases
Solution Approach 1:
The system replaces expensive mechanical spinning assemblies with a cost-effective arrayed receiver using standard photodetector elements and electronic beam steering. This substitution dramatically reduces manufacturing costs while maintaining long range sensing capability, making the technology more economically viable.
5Length of moving object
If mechanical spinning systems are used, then long range sensing is achieved, but device complexity increases
Solution Approach 1:
The patent replaces complex mechanical spinning mechanisms with a simpler electronic control system managing an arrayed receiver. This substitution reduces mechanical complexity and moving parts while achieving equivalent or superior performance through electronic coordination of multiple photodetectors, thereby simplifying the overall system architecture.
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 system achieves high spatial resolution with extended range and cost-effective 360-degree coverage by adaptively modifying the field of view and pulse parameters, enhancing the non-ambiguous range without compromising angular resolution.
Implementation Method 1
LIDAR systems determine distances to objects by measuring the round trip time-of-flight of laser light pulses
Implementation Method 2
LIDAR systems determine distances to objects by measuring the round trip time-of-flight of laser light pulses
Implementation Method 3
receive module with an arrayed receiver to capture reflected light
Data Source
AI summary
A light detection and ranging system includes synchronously scanning transmit and receive mirrors that scan a pulsed fanned laser beam in two dimensions. Imaging optics image a receive aperture onto an arrayed receiver that includes a plurality of light sensitive devices. Adaptive methods dynamically modify the size and location of the field of view as well as laser pulse properties in response to internal and external sensors data.