Carbon monoxide and methane integral optical fiber sensing measuring system

Abstract

This is an integral optical fiber sensor and testing system using for the carbon monoxide and methane. It composes of first DFB laser source, second DFB laser source, first waveform generator, second waveform generator, first wavelength select modulator, second wavelength select modulator, optical fiber coupling implement, sensor detection head, photoelectric conversion module, signal modulate data collection module and microprocessor. The first waveform generator acts on first wavelength select modulator, the latter controls the first DFB laser source and it connects with one import ending of coupling implement by optical fiber. The second waveform generator acts on second wavelength select modulator, the latter controls the second DFB laser source and it connects with another import ending of coupling implement by optical fiber. The fan-out of coupling implement connects with sensor detection head and the latter connects with photoelectric conversion module. The photoelectric conversion module connects with signal modulate and data collection module by lead and the latter connects with microprocessor by lead. The microprocessor controls the first wavelength selecting and modulator, second wavelength selecting and modulator and display modulator.

Description

technical field

[0001] The invention relates to the field of gas detection by optical means, and specifically belongs to a system for simultaneously measuring the concentration of multiple gases by using gas absorption spectrum detection technology. Background technique

[0002] Gas sensing technology plays an extremely important role in environmental monitoring, industrial gas process control and mine safety. Research on safe, reliable and highly sensitive harmful gas sensing technology has great scientific, social and economic significance. The detection of gas type and concentration can be divided into: optical type, semiconductor type, solid electrolyte type, contact combustion type, electrochemical type, etc. according to the detection principle. Among them, the optical gas sensor has many advantages that other sensors cannot match, such as high sensitivity, fast response speed, large dynamic range, anti-electromagnetic interference, flame-proof and explosion-proof, and...

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