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Development of super luminescent diode based sensing technique for multiple-gas monitoring

机译:基于超发光二极管的多气体监测传感技术的发展

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摘要

A multiple-gas sensor based on absorption spectroscopy technique using a super luminescent diode source of 1.5 μm is proposed and realized for combustion applications. This technique allows CH_4 and CO_2 gas sensing in bio-gas plant to monitor the quality of the gas. In this study, a solid Fabry-Perot etalon with a free spectral range of 517 GHz is also used and the detection limit is improved, allowing measurement with lower resolution spectrum analyzer. The detection limit of 292 ppm for C_2H_2 (at 1,543.7 nm), 4,492 ppm for CH_4, (at 1,525.92 nm) and 6.5 % for CO_2 (at 1,572.68 nm) is attained for 2 m path length with the spectrum analyser of 0.02 nm resolution. With the use of etalon, nearly the same detection limit is attained for all the species at 1 nm resolution.
机译:提出了一种基于吸收光谱技术的多气体传感器,该传感器使用1.5μm的超发光二极管源,并实现了燃烧应用。该技术允许在生物气工厂中检测CH_4和CO_2气体,以监测气体质量。在这项研究中,还使用了具有517 GHz自由光谱范围的固态Fabry-Perot标准具,并改善了检测限,从而允许使用较低分辨率的光谱分析仪进行测量。使用0.02 nm分辨率的光谱分析仪,在2 m的光程下,对于C_2H_2(在1,543.7 nm处),对于CH_4(在1,525.92 nm处)的4,492 ppm(在1,525.92 nm下)和对于CO_2(在1,572.68 nm处)的检测限达到了292 ppm。使用标准具,对于所有物种,在1 nm的分辨率下都可获得几乎相同的检测限。

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