LiDAR Receiver Gain Adjustment for Contamination Interference
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Solution Overview
Problem
LiDAR systems face interference and contamination on optical paths due to environmental factors like dust and water, leading to reduced detection accuracy.
Innovation Solution
A laser ranging method and device that adjusts the gain of the receiver within a light leading period to reduce the quantity of light leading point cloud points when contamination is detected, thereby minimizing interference.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the gain of the receiver is increased to improve detection sensitivity, then the detection precision is improved, but the impact of contamination on detection is worsened due to increased light leading point cloud points
Solution Approach 1:
The gain of the receiver is dynamically adjusted based on the detected quantity of light leading point cloud points. When contamination is detected (indicated by excessive light leading points), the gain is reduced to minimize the impact of contamination on detection accuracy.
Solution Approach 2:
The system continuously monitors the quantity of light leading point cloud points and uses this feedback to adjust the receiver gain. This closed-loop control ensures that the gain is optimized to balance detection sensitivity with resistance to contamination effects.
2Object-affected harmful factors
If the gain of the receiver is reduced to minimize contamination impact, then the harmful factors are reduced, but the detection precision deteriorates due to lower signal amplification
Solution Approach 1:
The receiver gain is dynamically adjusted based on real-time detection of light leading point cloud points. When contamination is present, gain is reduced; when contamination is absent or minimal, gain is increased to maintain high detection precision.
Solution Approach 2:
The system changes the gain parameter of the receiver based on the detected level of contamination. This parameter adjustment allows the system to adapt to varying environmental conditions and maintain optimal performance.
3Quantity of substance
If the light leading period is extended to capture more echo signals, then the quantity of detected points is improved, but the interference from contamination is worsened due to longer exposure to contaminated optical paths
Solution Approach 1:
Different gain values are applied to different time periods within the detection window. A lower gain is applied during the light leading period when contamination impact is highest, while higher gain can be applied to later periods where the optical path is cleaner.
Solution Approach 2:
The gain is dynamically adjusted within the light leading period based on the detected quantity of light leading point cloud points, allowing flexible optimization of the balance between signal capture and contamination rejection.
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 method effectively reduces the impact of contamination on LiDAR detection, maintaining high accuracy and reliability in various environmental conditions.
Implementation Method 1
a laser ranging method, including: obtaining a quantity of light leading point cloud points in a first preset region in a current frame of point cloud; where the light leading point cloud points are point cloud points corresponding to echoes received by a receiver
Data Source
AI summary
Embodiments of the present application provide a laser ranging method, device, and a LiDAR. The method includes: obtaining the quantity of light leading point cloud points in a first preset region in the current frame of point cloud, where the light leading point cloud points are point cloud points corresponding to echoes received by a receiver within a light leading period, and the light leading period is a period less than a first preset duration, starting from an emission moment of a laser beam corresponding to the light leading point cloud points; and adjusting the gain of the receiver within the light leading period to reduce the quantity of the light leading point cloud points.