Atmosphere fine particle spatial and temporal distribution Raman mie scattering laser radar surveying device

Abstract

The invention discloses an atmosphere fine particle spatial and temporal distribution Raman mie scattering laser radar surveying device. The device works at the wavelengths of 532nm, 355nm and 387nm and is provided with four detection channels. A light source is an Nd: YAG solid laser. According to the transmitting optical design, a single multi-wavelength coupling transmitting telescope is used. According to the receiving optical system design, a receiving telescope which is high in efficiency and small in caliber is used. According to the subsequent optical design, a multi-channel subsequent optical system is used. Expansion is facilitated, and a high protection grade and the high electromagnetic-interference-resisting capability are achieved. Detection light for detecting the wavelength of 532nm and detection light for detecting the wavelength of 355nm share the same transmitting telescope. A transmitting optical system and a receiving optical system are coaxially designed, and the systems are provided with small detection dead zones and designed with 387nm wavelength nitrogen Raman detection channels. Detection of the laser radar ratio close to a ground layer can be achieved, the detection precision of the systems is ensured, and synchronous remote sensing detection on multiple parameters of atmosphere fine particles is achieved. The device can be launched into the atmosphere at any angle so as to achieve all-weather on-line detection on the spatial and temporal distribution characteristics of the atmosphere fine particles. The device has the advantages of being high in detection precision, little in inversion error, high in spatial and temporal resolution and the like.

Description

technical field [0001] The invention relates to a laser radar optical telemetry device, in particular to a novel laser radar device that realizes high-precision all-weather detection of the temporal and spatial distribution characteristics of atmospheric fine particles. Background technique [0002] Atmospheric fine particles are a class of smaller pollutants, whose diameter generally does not exceed 2.5 microns, so they have a stronger scattering effect on light, and can easily lead to the formation of haze under unfavorable weather conditions. These particles themselves are likely to be harmful gases or heavy metals, causing harm to the human body; on the other hand, they can also become carriers of viruses and bacteria, contributing to the spread of respiratory infectious diseases. [0003] Since the 1980s, my country's social economy has entered a stage of rapid development. In just over 20 years, it has completed the development journey of developed countries for hundre...

AI Technical Summary

Problems solved by technology

[0008] The technical problem to be solved by the present invention is to provide a Raman-meter scattering laser radar measuring device for the temporal and spatial distribution of atmospheric fine particles, which can realize automatic continuous online business detection with high precision and high resolution for the temporal and spatial distribution of atmospheric fine particles; innovatively use A multi-wavelength coaxial transmitting telescope was established to detect the temporal and spatial distribution characteristics of atmospheric fine particles, a high-efficiency and high-stability receiving optical system and subsequent optical system were designed, and the detection of Raman scattering signals was realized by using a small-aperture telescope, which reduced the Assuming that the error brought by the inversion of the extinction coefficient of the lidar is compared, the inversion accuracy of the temporal and spatial distribution information of atmospheric fine particles is improved, and the problem of the complex optical structure of the Raman meter scattering lidar system is solved, and the problem of poor stability of the optical structure is satisfied. The need for long-term operational automatic online detection of atmospheric fine particles

Images