Natural gas pipeline leak detector based on NIR diode laser absorption spectroscopy.
The paper reports on the development of an integrated natural gas pipeline leak detector based on diode laser absorption spectroscopy. The detector transmits a 1.653 microm DFB diode laser with 10 mW and detects a fraction of the backscatter reflected from the topographic targets. To eliminate the effect of topographic scatter targets, a ratio detection technique was used. Wavelength modulation and harmonic detection were used to improve the detection sensitivity. The experimental detection limit is 50 ppmm, remote detection for a distance up to 20 m away topographic scatter target is demonstrated. Using a known simulative leak pipe, minimum detectable pipe leak flux is less than 10 ml/min.
Laboratory of Environmental Spectroscopy, Anhui Institute of Optics & Fine Mechanic, Chinese Academy of Sciences, Hefei 230031, People's Republic of China. xmgao@aiofm.ac.cn
Xiaoming
X
Gao
Hong
H
Fan
Teng
T
Huang
Xia
X
Wang
Jian
J
Bao
Xiaoyun
X
Li
Wei
W
Huang
Weijun
W
Zhang
D005579:Fossil Fuels; D005740:Gases / Q000032:analysis*; D007202:Indicators and Reagents; D018613:Microscopy, Confocal / Q000379:methods*; D019265:Spectroscopy, Near-Infrared / Q000295:instrumentation* / Q000379:methods* / Q000592:standards
D005579:Fossil Fuels; D005740:Gases; D007202:Indicators and Reagents