LiDAR Laser Detection with Multi-Pulse Dynamic Range Control
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Solution Overview
Problem
Existing LiDAR systems face challenges in achieving high detection accuracy without significantly increasing hardware resources, particularly due to issues of echo signal saturation or weakness, which are not adequately addressed by increasing the number of photosensitive components.
Innovation Solution
A laser detection method that adjusts emission control parameters for multiple emitting pulses within a measurement cycle, including parameters such as emission power, pulse width, and edge durations, to optimize dynamic range and improve detection accuracy without requiring additional hardware.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the number of photosensitive components is increased to improve detection accuracy, then the sampling rate increases, but the power consumption and apparatus cost increase significantly
Solution Approach 1:
The patent changes the emission control parameters (power, pulse width, edge durations) of multiple emitting pulses within a measurement cycle to optimize the dynamic range and improve detection accuracy without increasing the number of photosensitive components. This resolves the contradiction by achieving better measurement precision through parameter optimization rather than hardware scaling.
Solution Approach 2:
The patent employs multiple periodic emitting pulses within a measurement cycle, where each pulse has different emission control parameters. By using periodic pulsed emission rather than continuous emission or simply increasing component count, the system achieves improved detection accuracy while maintaining controlled power consumption through time-multiplexed operation.
2Measurement precision
If the number of photosensitive components is increased to improve detection accuracy, then the sampling rate increases, but the apparatus cost increases
Solution Approach 1:
The patent achieves improved detection accuracy by optimizing emission control parameters (power, pulse width, rising edge duration, falling edge duration) of multiple pulses rather than increasing the number of photosensitive components. This approach maintains simpler hardware architecture and reduces apparatus cost while achieving the desired measurement precision improvement.
Solution Approach 2:
The patent makes the emitting unit perform multiple functions by using the same photosensitive components to detect multiple pulses with different emission control parameters within a measurement cycle. This multi-functional approach eliminates the need for additional hardware components, thereby reducing apparatus cost while improving detection accuracy.
3Measurement precision
If multiple emitting pulses with different emission control parameters are used to expand dynamic range, then detection accuracy improves, but the processing complexity increases
Solution Approach 1:
The patent employs feedback mechanisms where the receiving unit processes echo signals from multiple emitting pulses with different emission control parameters and uses this information to optimize detection. The processing unit analyzes the echo signals and adjusts subsequent emissions based on detected target characteristics, improving detection accuracy while managing processing complexity through intelligent feedback-driven adaptation.
Solution Approach 2:
The patent performs preliminary action by pre-configuring multiple emitting pulses with different emission control parameters (power, pulse width, edge durations) before the measurement cycle begins. This preliminary preparation allows the system to handle diverse target scenarios without real-time complex processing, as the parameter variations are predetermined to cover a range of detection conditions.
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
Enhances detection accuracy by expanding the dynamic range, reducing echo signal saturation or weakness, and conserving hardware resources, thus improving performance at lower sampling rates.
Implementation Method 1
generating, by the emitting unit, a plurality of emitting pulses within a measurement cycle... emitting, by the emitting unit, a plurality of laser signals based on a plurality of emitting pulses
Implementation Method 2
receiving, by the receiving unit, an echo signal corresponding to the plurality of laser signals
Data Source
AI summary
The present application provides a method of laser detection that is performed by a LiDAR. The LiDAR includes an emitting unit and a receiving unit. The method includes: generating, by the emitting unit, multiple emitting pulses within a measurement cycle, where 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; emitting, by the emitting unit, multiple laser signals based on the multiple emitting pulses; receiving, by the receiving unit, an echo signals corresponding to the multiple laser signals; and processing, by the receiving unit, the echo signals to obtain the measurement results.