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Proceedings Paper

Novel spectrum absorption fiber methane sensor with DFBLD
Author(s): Shutao Wang; Rensheng Che
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Paper Abstract

Methane is the main composition of natural gas and marsh gas. It is an important industrial raw material and combustion gas in daily life. Detecting methane and its concentration in time has utmost important affect on safe operation of industry mine and person safe. Developing methane-detecting system has become an important topic and research direction of gas detecting domain. Through processing weak signal with harmonic detection technique, a multi-point fiber-optic gas sensor system for measuring the concentration of methane is designed based on light absorbing capability of gas, which varies with gas concentration at its characteristic wavelength. DFBLD (Distributed Feedback Laser Diode) in 1300nm waveband is used as illuminant and phase-detecting technology is used to carry out harmonic wave detecting the concentration of methane. Study shows that the accuracy of instrument is 5ppm, accuracy and stability of the sensor can meet practical demands. It can be applied to multi-point measurement at real-time in multiple occasions.

Paper Details

Date Published: 14 February 2005
PDF: 8 pages
Proc. SPIE 5634, Advanced Sensor Systems and Applications II, (14 February 2005); doi: 10.1117/12.569435
Show Author Affiliations
Shutao Wang, Harbin Institute of Technology (China)
Rensheng Che, Harbin Institute of Technology (China)

Published in SPIE Proceedings Vol. 5634:
Advanced Sensor Systems and Applications II
Yun-Jiang Rao; Osuk Y. Kwon; Gang-Ding Peng, Editor(s)

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