Multi-excitation-wavelength spectrometer type fluorescence laser radar system

Abstract

The invention discloses a multi-excitation-wavelength spectrometer type fluorescence laser radar system which comprises a multi-wavelength laser emission system, a signal frequency division system anda data storage and display system. According to the invention, a plurality of wavelength lasers are simultaneously emitted into the atmosphere to alternately excite organic matters in atmospheric particulates and obtain fluorescence spectra, the spectra obtained by exciting the same organic matter by the lasers with different wavelengths are different, and the characteristics of components, concentrations and the like of the organic matters in the atmospheric particulates are effectively explored by analyzing each excitation and emission fluorescence spectrum matrix diagram. The continuous observation can be achieved, manual sampling is not needed, data reliability, accuracy and real-time performance are improved, a basis is provided for meteorological environmental protection departmentsand the like to master atmospheric particulate organic matter changes in time, it is convenient for the meteorological environmental protection departments and the like to find abnormal changes in time and take effective measures for response, and the simultaneous detection of multiple instruments is achieved; the circulation condition of atmospheric particulate organic matters can be mastered, and possibility is provided for early warning.

Description

technical field [0001] The invention relates to the technical field of atmospheric monitoring, in particular to a multi-excitation wavelength spectroscopic fluorescent laser radar system. Background technique [0002] Lidar, as an instrument capable of real-time and continuous atmospheric detection, has been widely used to detect the distribution of vertical characteristics such as aerosols, smog, and dust, and has become one of the important instruments for studying the atmosphere today. Fluorescent Lidar , as a new type of laser radar, the development is relatively late. In recent years, some companies and research institutions have built fluorescent laser radar systems to detect individual fluorescent light waves. However, most fluorescent laser radars only use single-wavelength laser excitation to obtain There are few instruments and equipment on the market that use multiple wavelengths of lasers to simultaneously excite all or part of the fluorescent light waves in a ce...

AI Technical Summary

Problems solved by technology

[0002] Lidar, as an instrument capable of real-time and continuous atmospheric detection, has been widely used to detect the distribution of vertical characteristics such as aerosols, smog, and dust, and has become one of the important instruments for studying the atmosphere today. Fluorescent Lidar , as a new type of laser radar, the development is relatively late. In recent years, some companies and research institutions have built fluorescent laser radar systems to detect individual fluorescent light waves. However, most fluorescent laser radars only use single-wavelength laser excitation to obtain There are few instruments and equipment on the market that use multiple wavelengths of lasers to simultaneously excite all or part of the fluorescent light waves in a certain or individual band of fluorescence spectrum;

[0003] Three-dimensional fluorescence spectroscopy technology can be used to conveniently and accurately analyze and identify the composition, source, structure and other characteristics of organic matter in atmospheric particulate matter, and three-dimensional fluorescence spectroscopy technology, like other instruments and methods above, must first be sampled at fixed points at regular intervals. The above-mentioned instruments or methods can be used for analysis and identification after further processing in the laboratory, and real-time analysis and identification of data cannot be realized; and the frequency, time, and quality of sampling vary from person to person, and are subject to subjective and objective factors. The impact is extremely serious; at the same time, atmospheric particles continue to circulate, and the air environment is constantly changing due to the influence of air pressure, temperature, and humidity. Atmospheric prevention and early warning provides effective support is still lacking, therefore, the present invention proposes a multi-excitation wavelength spectroscopic laser radar system to solve the problems existing in the prior art

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