11 October 2010 Description of a system based on the DFB laser for natural gas leakage in the long optical-path of the tunnel
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Abstract
The leakage of methane and sulfureted hydrogen in the tunnel may threaten the environment, safety and lead to damage and casualties. In this paper, a system based on the distribution feedback laser is introduced to detect the leakage natural gas in the tunnel. The system can be used in the tunnel with the length over 2km. In the system, two approaches, namely the direct absorption and wavelength modulation is both adopted to acquire the concentration of methane and sulfureted hydrogen. The results show that the remote sensing can reach up to two kilometers with the detectability of methane 2ppm and sulfureted hydrogen 20ppm respectively. This system is carried out in the Puguang Gas filed for the first time and satisfactory results are obtained, making up the gap in such field as detecting natural gas in domestic market.
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Xiao-wen Shu, Yu-jun Zhang, Wen-qing Liu, Shuai Zhang, Yi-ben Cui, Re-Feng Kan, Hui Gen, "Description of a system based on the DFB laser for natural gas leakage in the long optical-path of the tunnel", Proc. SPIE 7656, 5th International Symposium on Advanced Optical Manufacturing and Testing Technologies: Optical Test and Measurement Technology and Equipment, 76562F (11 October 2010); doi: 10.1117/12.865728; https://doi.org/10.1117/12.865728
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