LiDAR Pulse Parameter Control for Echo Saturation and Weak Signals
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Solution Overview
Problem
Existing LiDAR systems face challenges in improving detection accuracy without increasing hardware resources, particularly due to issues of echo signal saturation or weakness, which are not adequately addressed by increasing the sampling rate.
Innovation Solution
A laser detection method that adjusts emission control parameters for multiple pulses within a measurement cycle, including emission power, pulse width, and edge durations, to expand the dynamic range and improve detection accuracy without requiring additional hardware components.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the sampling rate is increased by adding more photosensitive components, then the detection accuracy is improved, but the hardware resources and apparatus cost increase significantly
Solution Approach 1:
The patent changes the emission control parameters (power, pulse width, edge durations) of multiple laser pulses within a measurement cycle to dynamically adjust the echo signal characteristics. This allows the system to achieve high detection accuracy without increasing the number of photosensitive components, as the parameter variation enables effective use of existing hardware resources
Solution Approach 2:
The patent employs periodic laser pulse emission with varying control parameters within each measurement cycle. By sending multiple pulses with different emission characteristics and processing their echo signals periodically, the system achieves enhanced detection accuracy through temporal sampling rather than spatial expansion of hardware
2Measurement precision
If the emission power is increased to improve signal strength, then the detection accuracy improves, but the echo signal saturation increases
Solution Approach 1:
The patent dynamically adjusts the emission control parameters for each laser pulse within a measurement cycle. By varying the emission power, pulse width, and edge durations adaptively, the system optimizes the echo signal strength for different detection scenarios, achieving high detection accuracy while avoiding signal saturation through real-time parameter control
Solution Approach 2:
The patent systematically varies multiple emission parameters including power, pulse width, and edge durations to control the echo signal characteristics. This multi-parameter adjustment strategy enables the system to maintain optimal signal levels that improve detection accuracy without causing saturation, as the parameters can be tuned based on detection requirements
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 enhances detection accuracy by managing echo signal intensity, reducing saturation and weakness, while maintaining low hardware resource consumption.
Implementation Method 1
LiDAR is a mainstream radar sensor currently. It mainly obtains point cloud data through the echo of the emitted laser to detect objects in the environment.
Implementation Method 2
LiDAR is a mainstream radar sensor currently. It mainly obtains point cloud data through the echo of the emitted laser to detect objects in the environment.
Data Source
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Figure 4B~6A
AI summary
The present application provides a laser detection method, apparatus and storage medium, wherein the LiDAR includes an emitting unit, and the method includes: the emitting unit generates multiple emitting pulses within a measurement cycle, wherein at least two emitting pulses among the multiple emitting pulses have different emitting control parameters, and the emitting control parameters are used to adjust the multiple emitting pulses; the emitting unit emits multiple laser signals based on the multiple emitting pulses; the receiving unit receives an echo signals corresponding to the multiple laser signals, and processes the echo signals to obtain the measurement results. The laser detection method according to the embodiment of the present application can make the dynamic range larger, thereby improving the detection accuracy without increasing the consumption of hardware resources.