Micro-Pulse LiDAR for Low-Peak-Power Atmospheric Detection
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional LiDAR systems face high peak power in transmitted pulses, posing safety risks and high costs, and lack a composite system capable of simultaneously detecting water vapor, temperature, and pressure with improved iteration speed and inversion accuracy.
Innovation Solution
A micro-pulse LiDAR system with multiple transmitters emitting different wavelengths, an optical path transmission module, and detection modules for water vapor, pressure, and temperature, along with a data processing control module for unified inversion calculations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If conventional LiDAR systems use high peak power transmitted pulses to detect atmospheric parameters, then detection capability is improved, but safety risks increase and costs become high
Solution Approach 1:
The patent applies periodic pulsed laser action with micro-pulse width (ns level) and optimized repetition frequency. By using periodic pulses instead of continuous high power, the system achieves adequate detection capability while reducing peak power and safety risks. The pulse timing and duration are optimized to balance signal strength with safety constraints.
Solution Approach 2:
The patent changes key laser parameters including pulse width (ns level), repetition frequency, and peak power to optimize the balance between detection capability and safety. By adjusting these parameters, the system achieves effective atmospheric parameter detection without requiring excessively high peak power, thereby reducing safety risks and operational costs.
2Measurement precision
If conventional LiDAR systems use high peak power transmitted pulses, then detection capability is improved, but device cost increases
Solution Approach 1:
The patent optimizes laser parameter selection including pulse width, repetition frequency, and peak power to reduce device cost while maintaining detection capability. By carefully selecting parameters that do not require excessively high peak power, the system avoids the need for expensive high-power laser components and associated cooling/safety infrastructure.
Solution Approach 2:
The patent uses partial action by employing micro-pulses with sufficient but not excessive energy to achieve the required detection capability. This avoids the need for high peak power systems, thereby reducing device cost while still obtaining adequate signal returns for atmospheric parameter detection.
3Object-affected harmful factors
If LiDAR system uses micro-pulse with reduced peak power, then safety is improved, but detection capability may deteriorate
Solution Approach 1:
The patent uses periodic micro-pulses with optimized repetition frequency to compensate for reduced peak power. By adjusting the pulse repetition rate and timing, the system accumulates sufficient signal strength over multiple pulses to maintain detection capability while keeping individual peak power levels safe.
Solution Approach 2:
The patent adjusts multiple parameters including pulse width, repetition frequency, and detection integration time to compensate for reduced peak power. These parameter changes enable the system to maintain adequate detection capability for atmospheric parameters while operating at safe peak power levels.
Data Source
AI summary
A micro-pulse LiDAR and a method for detecting water vapor, temperature, and pressure of the atmosphere are provided. The micro-pulse LiDAR includes a first transmitter, a second transmitter, a third transmitter, an optical path transmission module, a water vapor channel detection module, a pressure channel detection module, a temperature channel detection module, a multi-channel data accumulator, a processing device, and a pulse generator. The method for detecting the water vapor, the temperature, and the pressure of the atmosphere comprises: chopping, via the processing device, multi-wavelength continuous lasers emitted by the transmitters to obtain multi-wavelength pulsed lasers; transmitting the multi-wavelength pulsed lasers according to established optical paths, and comprehensively detecting the water vapor, the temperature, and the pressure of the atmosphere, so that the three parameters can be input conditions for each other in an inversion process, which improves an iteration speed and inversion accuracy.