Adaptive LIDAR Scan Profile Parameterization for Region-Specific Resolution
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Solution Overview
Problem
LIDAR systems face challenges in achieving high resolution around detected objects, as existing methods do not effectively adapt the light scan profiles to increase resolution in regions of interest based on the object's width, number of scanlines, and angular offset.
Innovation Solution
The method involves using a LIDAR device that emits pulsed light along a light scan profile, which adjusts resolution by varying the width of the region of interest, number of scanlines, and angular offset, allowing for increased resolution in specific areas by modifying the scanning rate and pulse frequency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a fixed light scan profile is used, then the system is simple to operate, but the resolution cannot be increased in regions of interest
Solution Approach 1:
The patent applies dynamics by making the light scan profile adjustable and adaptive rather than fixed. The system can dynamically modify scan parameters (number of scanlines, angular offset, pulse frequency) based on detected objects and regions of interest, allowing resolution to be increased where needed while maintaining simplicity through automated adjustment
2Measurement precision
If the number of scanlines is increased to improve resolution, then measurement precision increases, but the scanning time increases
Solution Approach 1:
The patent applies local quality by concentrating additional scanlines specifically in regions of interest rather than uniformly across the entire field of view. The system identifies objects and determines regions requiring higher resolution, then allocates extra scanlines only to those areas, improving local measurement precision without proportionally increasing overall scanning time
Solution Approach 2:
The system applies partial action by performing high-resolution scanning only where needed (in regions of interest) rather than applying maximum resolution throughout the entire field. This allows the system to achieve sufficient precision for detected objects while avoiding unnecessary scanning time in areas without objects or low priority regions
3Measurement precision
If the light scan profile is adapted to regions of interest, then measurement precision improves, but the control complexity increases
Solution Approach 1:
The patent applies feedback by using object detection results to automatically adjust the light scan profile. The system detects objects, determines regions of interest based on object characteristics (width, position), and automatically modifies scan parameters accordingly. This closed-loop approach improves measurement precision while managing control complexity through automated decision-making based on detected object properties
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 accuracy of LIDAR systems by increasing resolution in regions of interest, improving object detection and tracking, especially in autonomous vehicle applications.
Implementation Method 1
a light source configured to emit pulsed light... The reflected light is detected by sensors
Implementation Method 2
The sensor signals are used by LIDAR devices (or separate data processing devices) to determine the distance between the LIDAR device and the object(s)
Implementation Method 3
a horizontal beam steerer configured to steer the emitted pulsed light along horizontal scanlines, a vertical beam steerer configured to steer the emitted pulsed light along vertical direction
Data Source
AI summary
A method includes detecting an object using a first light scan profile and, in response to detecting the object, using a second light scan profile with increased resolution in a region of interest relative to the first scan profile. The second light scan profile is based, at least in part, on a width of the region of interest, a number of scanlines for the region of interest, and an angular offset to the region of interest.