Open long-path broad-spectrum gas measurement system

Abstract

The invention provides an open long-path broad-spectrum gas measurement system, which solves the problems of narrow measurement spectrum range and a few measurable gas components of the conventional open long-path broad-spectrum gas measurement system. The measurement system comprises a plurality of light sources, a multiple transceiving fiber bundle structure, a telescope and a spectrometer, wherein the light sources can be light sources capable of transmitting continuous spectrums and tunable laser, and are respectively coupled to independent transmission fiber incident ends; and the light is emitted through the public ends of the transmission fibers, is collimated through a spherical mirror in the telescope, is reflected in the original direction after the light reaches a cube-corner retroreflector on the other end of the long path of the telescope, enters the public ends of the transceiving fibers through focusing of the spherical mirror, is emitted through the independent receiving fiber exit ends, and is subjected to spectrum detection by the spectrometer. The system only requires one concave mirror inside the telescope, has a simple structure and high spectrum utilization efficiency, and can complete absorption spectrum measurement of various gases from an ultraviolet waveband to an infrared waveband.

Description

【Technical field】: [0001] The invention relates to an open long optical path wide-spectrum gas measurement system, especially a monitoring system for measuring trace gas in air. 【Background technique】: [0002] In the monitoring of gases in air pollution, point instruments can be used to sample and analyze different gases, but this method can only understand the air pollution situation in the sampling space of the monitoring point and the average condition within the sampling period, and the representativeness of time and space Poor, and a point monitoring instrument generally can only monitor one gas. The gas absorption spectroscopy measurement technology using the open long optical path method is becoming an ideal tool for environmental pollution monitoring due to its large-scale, multi-component detection, and continuous real-time online measurement methods. The open long optical path technology can monitor several pollutants in the same spectral absorption band at the s...

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to solve the problem that the existing open long optical path measurement system or point measuring instrument cannot monitor the composition and concentration of multiple gases at the same time, and the point measuring instrument has poor temporal and spatial representation, and provides an open long optical path measuring instrument. long-range wide-spectrum gas measurement system

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