Multi-Wavelength Laser Radar for Atmospheric Particulate Analysis
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Solution Overview
Problem
Current fluorescence laser radar systems rely on single-wavelength excitation, limiting real-time analysis and identification of atmospheric particulate matter compositions and concentrations, and lack the capability for continuous monitoring, which hampers early warning and control in meteorological and environmental protection.
Innovation Solution
A multi-excitation wavelength spectrometer fluorescence laser radar system that simultaneously emits multiple wavelengths of lasers to excite organic matter in atmospheric particulate matters, using a multi-wavelength laser emission system, signal frequency division system, and data storage and display system to obtain and analyze fluorescence spectra, enabling continuous observation and real-time data processing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If single-wavelength laser excitation is used, then the system structure is simple, but the measurement precision and identification capability of atmospheric particulate matter compositions are limited
Solution Approach 1:
The patent divides the laser excitation source into multiple wavelength components (e.g., 266nm, 280nm, 295nm, 308nm, 355nm, 532nm, 1064nm) that can be independently controlled and directed through optical switches. This segmentation allows comprehensive fluorescence spectrum coverage while maintaining manageable system complexity through modular optical switching control
Solution Approach 2:
The patent employs a multi-wavelength laser assembly that can generate multiple excitation wavelengths simultaneously, and an optical switching system that can select and direct different wavelength combinations to the atmospheric sampling chamber. This multi-functional design enables comprehensive organic matter identification across different fluorescence excitation bands using a single integrated system
2Productivity
If manual sampling is used, then the device complexity is low, but the productivity and real-time analysis capability are insufficient
Solution Approach 1:
The patent replaces manual mechanical sampling with an automated optical detection system where lasers continuously excite organic matter in the atmospheric sampling chamber, and photodetectors continuously monitor fluorescence emissions. This substitution of mechanical sampling with optical-electronic detection enables real-time continuous monitoring without manual intervention
Solution Approach 2:
The system performs self-service continuous monitoring where the multi-wavelength laser assembly automatically cycles through different wavelengths, the optical switching system dynamically routes fluorescence signals to appropriate detectors, and the data processing system continuously analyzes spectra. This automated self-service operation eliminates manual sampling while maintaining system manageability
3Reliability
If single-wavelength excitation is used, then the data processing is simple, but the reliability and accuracy of atmospheric particulate matter detection are insufficient
Solution Approach 1:
The patent transitions from single-wavelength to multi-wavelength excitation, adding a spectral dimension to the detection process. By measuring fluorescence emissions across multiple excitation wavelengths and constructing three-dimensional fluorescence spectra (excitation wavelength vs. emission wavelength vs. intensity), the system achieves comprehensive organic matter identification with enhanced reliability through multi-dimensional data analysis
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
This system allows for continuous, real-time observation and analysis of atmospheric particulate matter compositions and concentrations, enhancing data reliability, accuracy, and enabling early warning capabilities for meteorological and environmental protection.
Implementation Method 1
The multi-wavelength laser assembly 1 simultaneously generates output of lasers with seven wavelengths of 266 nm, 280 nm, 295 nm, 308 nm, 355 nm, 532 nm, and 1064 nm
Implementation Method 2
The organic matter irradiated to the atmospheric particulate matters generates the mie scattering signal, and the organic matter is excited to generate a fluorescence spectrum signal
Implementation Method 3
All the mie scattering signals and fluorescence spectrum signals generated by the first laser and the second laser irradiated into the atmosphere are received by the Cassegrain high-power astronomical telescope 8 and focus on the diaphragm 9
Implementation Method 4
The first dichroic mirror 12 separates out the laser with the long-wavelength signal of 1064 nm... The second dichroic mirror separates out the signals with the wavelength of 532 nm
Implementation Method 5
The first photoelectric multiplier tube and the second photoelectric multiplier tube convert the optical signals into the electrical signals
Data Source
AI summary
The present invention discloses a multi-excitation wavelength spectrometer fluorescence laser radar system, including a multi-wavelength laser emission system, a signal frequency division system and a data storage and display system. The present invention emits lasers with a plurality of wavelengths into the atmosphere simultaneously to alternately excite an organic matter in atmospheric particulate matters and obtain a fluorescence spectrum. The lasers with different wavelengths can excite the same organic matter to obtain different spectra. By analyzing a matrix diagram of each excitation and emission fluorescence spectrum, the present invention effectively explores the features of compositions and concentration of the organic matter in the atmospheric particulate matters.