LiDAR Scan Mirror Profiles for Region-Specific Resolution Control
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Traditional LIDAR systems using linear or sinusoidal motion profiles for mirrors face limitations in resolution, with uniform or varying resolution across the scan, leading to inefficiencies and performance issues.
Innovation Solution
A LIDAR system with a first and second scanning mirror assembly that adjusts angular velocity and laser pulse repetition rate based on a region of interest, using synchronized scanning to enhance resolution and efficiency by slowing down in critical areas and speeding up in others.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If linear motion profile is used for scanning mirrors, then uniform resolution is achieved across the scan, but the achievable resolution and system performance are limited
Solution Approach 1:
The patent applies dynamics by transitioning from static linear or sinusoidal motion profiles to dynamic motion profiles that adapt the mirror scanning speed in real-time. The system continuously adjusts the angular velocity of scanning mirrors based on the presence and importance of objects in different regions of the field of view, enabling variable resolution across the scan area while maintaining high scanning efficiency.
Solution Approach 2:
The patent changes the motion parameters of scanning mirrors dynamically. Instead of using fixed linear or sinusoidal profiles, the system modifies the scanning speed, acceleration, and trajectory parameters on-the-fly based on detected objects and predefined regions of interest. This allows the system to achieve higher resolution in critical areas while maintaining overall scanning productivity.
2Speed
If sinusoidal motion profile is used for scanning mirrors, then faster motion near the center is achieved, but varying resolution with slower motion at edges occurs
Solution Approach 1:
The patent applies local quality by assigning different motion characteristics to different regions of the field of view. Instead of using a uniform sinusoidal profile, the system creates region-specific motion profiles that tailor the scanning speed and resolution to the local requirements. Critical regions receive enhanced attention with slower scanning speeds and higher resolution, while less important areas are scanned more quickly.
Solution Approach 2:
The system dynamically adjusts the scanning profile based on real-time detection results. When objects are detected in specific regions, the motion profile is modified to spend more time scanning those areas with higher resolution. This dynamic adaptation allows the system to maintain high scanning speed overall while achieving high resolution locally where needed.
3Measurement precision
If traditional scanning profiles are used, then simple control is maintained, but resolution and performance are limited
Solution Approach 1:
The patent implements feedback mechanisms where detection results from previous scans inform the motion profile for subsequent scans. The system uses feedback loops to continuously optimize the scanning strategy based on detected objects, regions of interest, and performance metrics. This feedback-driven approach enables complex adaptive behavior while maintaining a relatively simple overall system architecture.
Solution Approach 2:
The system performs preliminary actions by pre-defining regions of interest and motion profiles before actual scanning begins. These preliminary configurations allow the system to quickly adapt to different scanning scenarios without requiring complex real-time calculations during operation. The preliminary setup includes defining critical areas, object priorities, and base motion profiles that can be dynamically adjusted.
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 higher resolution and data accuracy in regions of interest while maintaining efficient scanning, optimizing performance and thermal management through coordinated control of mirror velocities and laser pulse rates.
Implementation Method 1
scan laser light pulses in a field of view
Implementation Method 2
detect and measure distances to objects
Data Source
AI summary
Aspects of the subject disclosure may include, for example, a light detection and ranging system that includes a laser light source, scanning mirrors, light-sensitive devices, and time-of-flight measurement circuits. The angular velocity of the scanning mirrors is adjusted in a region of interest to modify resolution. A scanning mirror on a fast scan axis slows down entering the region and speeds up exiting, while a scanning mirror on a slow scan axis does the opposite. The system may also increase a laser pulse repetition rate in the region of interest for enhanced data acquisition. Other embodiments are disclosed.