LiDAR Receiver Gain Control for Light-Leading Point Clouds
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Solution Overview
Problem
Existing LiDAR systems face challenges in achieving a large field of view and high-resolution detection while maintaining a simple system design, which is crucial for applications like autonomous driving.
Innovation Solution
A LiDAR system incorporating a transceiver module, scanning module, and beam adjustment module, where the beam adjustment module increases the outgoing angle of light to achieve a larger detection range, and the optical system is designed to maintain a compact and efficient layout.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of moving object
If a traditional LiDAR system design is used, then the system structure is simple, but the field of view is limited and detection resolution is insufficient
Solution Approach 1:
The patent divides the LiDAR system into three functional modules: a transceiver module for light emission and reception, a scanning module for deflecting light beams, and a beam adjustment module for controlling beam angles. This segmentation allows each module to perform its specific function efficiently, achieving a large field of view while maintaining relatively simple system design through modular architecture
Solution Approach 2:
The beam adjustment module introduces an additional degree of freedom by independently controlling the outgoing angle of light beams in addition to the scanning module's deflection control. This dimensional expansion enables the system to achieve a larger field of view without proportionally increasing system complexity, as the beam adjustment operates in a separate angular dimension
2Area of moving object
If the field of view is increased, then the detection range is expanded, but the detection resolution may be reduced
Solution Approach 1:
The beam adjustment module applies different outgoing angles to different beam groups, creating locally optimized detection characteristics. By adjusting the angle of each beam group independently, the system maintains high detection resolution in specific regions while achieving a large overall field of view, rather than uniformly distributing detection quality across the entire detection range
Solution Approach 2:
The system dynamically adjusts the outgoing angle parameter of light beams through the beam adjustment module. By varying this parameter across different beam groups, the system optimizes the balance between detection range and resolution, enabling expanded detection range while maintaining high resolution through parameter optimization rather than fixed geometric constraints
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 a large field of view with high-resolution detection, simplifies the system design, reduces component count, and enhances detection precision and accuracy.
Implementation Method 1
the transceiver module is configured to emit outgoing light according to a preset timing, and emit the outgoing light toward the scanning module
Implementation Method 2
the echo light is a beam of light returned after the outgoing light is reflected by a measured object in the measured region
Implementation Method 3
the scanning module is configured to deflect the outgoing light toward the beam adjustment module
Data Source
AI summary
Embodiments of the present application provide a laser ranging method, apparatus and LiDAR, the method comprising: obtaining a quantity of light-leading point cloud points in a first preset region in a current frame point cloud; wherein the light-leading point cloud points are point cloud points corresponding to echoes received by a receiver in a light-leading period, and the light-leading period is a period less than a first preset time length from the emission moment of a laser beam corresponding to the light-leading point cloud points; when the quantity of the light-leading point cloud points meets a first preset condition, adjusting the gain of the receiver in the light-leading period to reduce the quantity of the light-leading point cloud points.