Multi-point coordinated laser module and gas detection system

Abstract

The invention discloses a coordinated multi-point laser module and a gas detection system. The multi-point coordinated laser module comprises a packaging housing, a main detection laser, an collimating and beam expanding system, a Fourier lens, an auxiliary laser group and a control device, can send main detection laser light in a normal incidence manner to a gas sample chamber and can send at least four auxiliary detection laser light in an oblique incidence manner to the gas sample chamber; when a to-be-detected sample is under detection, to-be-detected sample information carried by the main detection laser light emitted out of the gas sample chamber can be made up by to-be-detected sample information carried by the at least four auxiliary detection laser light emitted out of the gas sample chamber, the detection comprehensiveness for the to-be-detected sample information is guaranteed, so that the lower limit of particle size detection is expanded effectively, and the detection precision of the whole gas detection system and the reliability of detection data are improved.

Description

technical field [0001] The present application relates to the technical field of gas detection, and more specifically, to a multi-point cooperative laser module and a gas detection system. Background technique [0002] In recent years, with the increasing level of air pollution, smog has become one of the pollution sources that plague many cities in our country. Haze is a general expression of various suspended particulates in the atmosphere exceeding the standard. How to detect suspended particulates in the atmosphere is a prerequisite for controlling haze weather. [0003] The current mainstream method for detecting the concentration of suspended particulate matter in the atmosphere is the light scattering method. The strong distribution includes information such as particle size and particle size distribution concentration of suspended particles. By obtaining the light intensity information of the scattered light in a certain way, the relevant information of the suspend...

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Problems solved by technology

[0004] In order to solve the above technical problems, the present invention provides a multi-point cooperative laser module and a gas detection system to solve the problem caused by the total reflection of part of the scattered light of the detection light when it exits the gas sample chamber during the detection process. The problem of the detection accuracy of the detection system and the reduction of the reliability of the detection data

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