Author:
Zhang Shuai ,Liu Wen-Qing ,Zhang Yu-Jun ,Ruan Jun ,Kan Rui-Feng ,You Kun ,Yu Dian-Qiang ,Dong Jin-Ting ,Han Xiao-Lei , ,
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.
Publisher
Acta Physica Sinica, Chinese Physical Society and Institute of Physics, Chinese Academy of Sciences
Subject
General Physics and Astronomy
Reference12 articles.
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
Cited by
4 articles.
订阅此论文施引文献
订阅此论文施引文献，注册后可以免费订阅5篇论文的施引文献，订阅后可以查看论文全部施引文献