Research of quantitative remote sensing of natural gas pipeline leakage based on laser absorption spectroscopy

Zhang Shuai; Liu Wen-Qing; Zhang Yu-Jun; Ruan Jun; Kan Rui-Feng; You Kun; Yu Dian-Qiang; Dong Jin-Ting; Han Xiao-Lei

doi:10.7498/aps.61.050701

Abstract

Quantitative remote sensing of natural gas pipeline leakage based on laser absorption spectroscopy is reported. Key technical issues of mobile laser remote sensing are discussed through simulating leak detection. For quantitative remote sensing of trace leakage, the signals with counter-phase and isovalue of residual amplitude modulation are introduced. Then the offset is compensated, the influence of harmonic signal is reduced and sensitivity is improved. The improved soft-threshold denoising method is proposed by analyzing the characteristics of echo absorption spectrum. The results show that the signal-to-noise ratio is improved two times as great as that by the traditional soft-threshold denoising method and the shape of second harmonic (2f) signal is well preserved. The minimum remote sensitivity will be 80 ppm/m under the mobile remote sensing.

Keywords:

Authors and contacts

1.
Key Laboratory of Environmental Optics and Technology, Anhui Institute of Optics and Fine Mechanics, Chinese Academy of Sciences,Hefei 230031, China;
2.
Shengli Engineering Design and Consulting Co., Ltd., Dongying 257026, China
Funds: Project supported by the National High Technology Research and Development (863 Program) (Grant No. 2008AA06Z208).

References

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[10]	Roths J, Zenker T, Parchatka U 1996 Appl. Opt. 35 7075
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Cited By

[1]	Wang D Q, Gao H L 2006 Nat. Gas Ind. 26 120 (in Chinese) [王大庆, 高惠临2006 天然气工业 26 120]
[2]	Fan H, Gao X M, Bao J, Wang X, Hang T 2006 Spectrosc. Spect.Anal. 26 1423 (in Chinese) [樊宏, 高晓明, 鲍健, 王霞, 黄腾 2006 光谱学与光谱分析 26 1423]
[3]	Zhang S, Liu W Q, Zhang Y J 2010 Chin. Opt. Lett. 8 443
[4]	Jason J N, Joanna M D I, Murray J T 2002 Appl. Opt. 41 446
[5]	Werle P, Mücke R, Amato F D 1998 Appl. Phys. B 67 307
[6]	Amato F D, Mazzing H P, Castagnoli F 2002 Appl. Phys. B 75195
[7]	Qi F, LiuWQ, Zhou B 2003 Acta Phys. Sin. 52 2197 (in Chinese)[齐锋, 刘文清, 周斌 2003 物理学报 52 2197]
[8]	Normand E, McCulloch M, Duxbury G, Langford N 2003 Opt.Lett. 28 16
[9]	Kan R F, Liu W Q, Zhang Y J 2005 Acta Phys. Sin. 54 1927 (inChinese) [阚瑞峰, 刘文清, 张玉钧 2005 物理学报 54 1927]
[10]	Roths J, Zenker T, Parchatka U 1996 Appl. Opt. 35 7075
[11]	Zhu X, Cassidy D T 1995 Appl. Opt. 34 8303
[12]	Duan Y G, Ma L Y, Li Y J, Wang T H 2010 Sci. Tech. Eng. 235755 (in Chinese) [段永刚, 马立元, 李永军, 王天辉 2010 科学技术与工程 23 5755]

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Vol. 61, Issue 5 - 2012-03-05

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