A multi-wavelength laser radar measuring device for atmospheric particulate matter particle size spectrum temporal and spatial distribution

Abstract

The invention discloses a multi-wavelength laser radar measuring device for the time-space distribution of the particle size spectrum of atmospheric particles, which includes a multi-wavelength detection light source, a laser radar transmitting optical system, a laser radar receiving optical system, etc.; The ultraviolet band is emitted into the atmosphere through the laser radar transmitting optical system. After the detection light of different wavelengths interacts with atmospheric particles and nitrogen, elastic scattering signals and Raman scattering signals of different wavelengths are generated, which are identified and received by the laser lightning receiving optical system. The transient recorder collects, converts and saves it as a digital signal, and inverts and calculates the high-resolution and high-precision particle size spectrum time-space distribution data at different heights on the optical path. The invention can realize day and night all-weather observation of the time-space distribution of the particle size spectrum of the atmospheric particles, obtain the three-dimensional data of the particle size spectrum of the atmospheric particles changing with height, and has high time resolution, spatial resolution and high detection accuracy.

Description

technical field [0001] The invention relates to the technical field of optical telemetry receiving devices, in particular to a multi-wavelength laser radar measuring device for atmospheric particulate matter particle size spectrum time-space distribution, which belongs to multi-wavelength laser source, laser radar detection technology and high-precision spectrometer spectral resolution technology, and establishes eight channels The multi-wavelength atmospheric particle size spectrum space-time distribution lidar device realizes automatic and continuous monitoring of the particle size spectrum distribution of atmospheric particles. Background technique [0002] Atmospheric particle size spectrum time-space distribution multi-wavelength lidar measurement device is a tool for active remote sensing detection based on the characteristics of atmospheric particles at different wavelengths of spectral scattering difference, it can quickly obtain the vertical or horizontal distributio...

AI Technical Summary

Problems solved by technology

However, in the patent application or published literature, the laser filter is used for spectroscopic processing, and the method of spectrometer spectroscopic spectrometry is not used for multi-wavelength laser radar design; in terms of laser radar light source, the device for protection of the present invention adopts a laser with a repetition rate of 5KHz The probe light with high repetition rate has a relatively low single pulse energy, which is essentially different from the light source in the patent protection or published literature

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