Vibration-rotational Raman-Mie scattering multi-wavelength laser radar system and working method thereof

Abstract

The invention discloses a vibration-rotational Raman-Mie scattering multi-wavelength laser radar system and a working method thereof. The system comprises a first system and a second system, wherein the first system works in an ultraviolet wave segment, the second system works in a visible infrared wave segment, and the first system and the second system both comprise laser emission units, optical receiving units, signal detection and data collecting units and control units. The laser emission units are used for emitting lasers to air, the optical receiving units are used for receiving back scattering echo signals of the air on the lasers emitted by the laser emission units, and conduct rotational Raman, vibration Raman and elastic scattering light splitting on the back scattering echo signals, the signal detection and data collecting units are used for obtaining parameter information of air temperature, water vapor, aerosol and cloud from the back scattering echo signals after light splitting, and the control units are used for controlling the laser emission units, the optical receiving units and the signal detection and data collecting units to run. The vibration-rotational Raman-Mie scattering multi-wavelength laser radar system and the working method of the system can achieve all-weather air comprehensive continuous automatic observation.

Description

technical field [0001] The invention relates to the technical field of atmospheric detection, in particular to a vibration-rotational Raman-meter scattering multi-wavelength laser radar system and a working method thereof. Background technique [0002] The rapid development of laser equipment and photoelectric detection equipment has made it possible to use remote sensing to continuously observe the atmospheric temperature and humidity profile. Due to the short wavelength and strong directionality of the detection beam used, the lidar has high spatial and temporal resolution (spatial resolution can reach several meters, time resolution can reach several seconds) and high detection sensitivity (can detect nearly a hundred The sparse atmospheric composition of only a few atoms in a cubic centimeter at an altitude of one kilometer) and other advantages. The application of atmospheric detection lidar can conveniently and efficiently detect various gas components and aerosols in...

AI Technical Summary

Problems solved by technology

[0005] At present, although there are many methods in China that can be used to observe the profile of temperature and humidity, there are still few or imperfect radar systems that can automatically observe temperature and humidity throughout the day; Widely concerned, society and scientific research increasingly need long-term continuous observation of aerosols and clouds, and there are many instruments for the separate detection of clouds and aerosols.

However, there are few instruments capable of simultaneous, continuous, automated, all-day observations of atmospheric temperature, water vapour, aerosols, and clouds

[0006] As far as this technical field is concerned, domestic research is mainly based on the L625 multifunctional laser radar built by the Atmospheric Optics Center of Anhui Institute of Optics and Mechanics, Chinese Academy of Sciences in 1995. a m a n channel, but in view of the limitation of the radar itself, it can only measure the water vapor of 1-5km, and it is only limited to night observation, and does not contain the emission wavelength of 1064nm, so it cannot observe the cloud

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