Passive infrared imaging sensor for standoff detection of methane leaks

被引：13

作者：

Cosofret, BR ^{[1
]}

Marinelli, WJ ^{[1
]}

Ustun, T ^{[1
]}

Gittins, CM ^{[1
]}

Boies, MT ^{[1
]}

Hinds, MF ^{[1
]}

Rossi, DC ^{[1
]}

Coxe, R ^{[1
]}

Chang, S ^{[1
]}

Green, BD ^{[1
]}

Nakamura, T ^{[1
]}

机构：

[1] Phys Sci Inc, Andover, MA 01810 USA

来源：

CHEMICAL AND BIOLOGICAL STANDOFF DETECTION II | 2004年 / 5584卷

关键词：

methane leaks; remote sensing; infrared imaging;

D O I：

10.1117/12.581190

中图分类号：

O65 [分析化学];

学科分类号：

070302 ; 081704 ;

摘要：

Physical Sciences Inc. (PSI) has developed an imaging sensor for remote detection of natural gas (methane) leaks. The sensor is comprised of an IR focal plane array-based camera which views the far field through a rapidly tunable Fabry-Perot interferometer. The interferometer functions as a wavelength-variable bandpass filter which selects the wavelength illuminating the focal plane array. The sensor generates 128 pixel x 128 pixel 'methane images' with a spatial resolution of 1 m (>100 x 100 pixel field-of-view). The methane column density at each pixel in the image is calculated in real time using an algorithm which estimates and compensates for line-of-sight atmospheric transmission. The compensation algorithm incorporates range-to-target as well as local air temperature and humidity. System tests conducted at 200 m standoff from sensor to leak location indicate probability of detection >90% for methane column densities >1000 ppmv-m and >2K thermal contrast between the air and the background. The probability of false alarm is <0.2% under these detection conditions.

引用

页码：93 / 99

页数：7