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A fiber methane detector based on spectrum absorption is reported. The methane monitor use a distributed feedback
diode lasers(DFB) which is near infrared spectroscopy as the optic source, we realized online harmonic detection of the
methane. The advantages of this detector include high precision, elimination of interference from humidity and other
gases as well as long recalibration cycle. The detection of CH4 is very important in the methane power generation.
Especially the detection of the tail gas with high temperature is the dependence to judge the generator. In this paper, we
give some data witch gained from the local of methane power generation. The data reach an agreement with the
measurements of the sensor using in mine. And the detector has the function of self reference, so the detector is more
depended. This proved that the fiber methane detector can meet the needs of the generator. It have some contribution to
the production safety of the mine and the energy saving and emission reduction and the environmental protection.
Yanfang Li,Yubin Wei,Ying Shang,Yanjie Zhao,Tingting Zhang,Weisong Zhao,Chang Wang, andTongyu Liu
"Fiber methane gas detector based on harmonic detection and application in ventilation air methane power generation", Proc. SPIE 7656, 5th International Symposium on Advanced Optical Manufacturing and Testing Technologies: Optical Test and Measurement Technology and Equipment, 76565D (12 October 2010); https://doi.org/10.1117/12.865735
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Yanfang Li, Yubin Wei, Ying Shang, Yanjie Zhao, Tingting Zhang, Weisong Zhao, Chang Wang, Tongyu Liu, "Fiber methane gas detector based on harmonic detection and application in ventilation air methane power generation," Proc. SPIE 7656, 5th International Symposium on Advanced Optical Manufacturing and Testing Technologies: Optical Test and Measurement Technology and Equipment, 76565D (12 October 2010); https://doi.org/10.1117/12.865735