Stewart, G. and Johnstone, W. and Thursby, G.J. and Culshaw, B. (2010) Near infrared spectroscopy for fibre based gas detection. Proceedings of SPIE: The International Society for Optical Engineering, 7675 (767507).
SPIE_7675_Near_IR_Spectroscopy.pdf - Submitted Version
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Gas sensing systems based on fibre optic linked near infra red absorption cells are potentially a flexible and effective tool for monitoring accumulations of hazardous and noxious gases in enclosed areas such as tunnels and mines. Additionally the same baseline technology is readily modified to measure concentrations of hydrocarbon fuels - notably but not exclusively methane, and monitoring emissions of greenhouse gases. Furthermore the system can be readily implemented to provide intrinsically safe monitoring over extensive areas at up to ~250 points from a single interrogation unit. In this paper we review our work on fibre coupled gas sensing systems. We outline the basic principles through which repeatable and accurate self calibrating gas measurements may be realised, including the recover of detailed line shapes for non contact temperature and / or pressure measurements in addition to concentration assessments in harsh environments. We also outline our experience in using these systems in extensive networks operating under inhospitable conditions over extended periods extending to several years.
|Keywords:||gas sensing, fibre optic, infra red absorption cells, monitoring gases, hazardous gases, hydrocarbon fuels, greenhouse gases, Electrical engineering. Electronics Nuclear engineering, Condensed Matter Physics, Electronic, Optical and Magnetic Materials, Electrical and Electronic Engineering, Applied Mathematics, Computer Science Applications|
|Subjects:||Technology > Electrical engineering. Electronics Nuclear engineering|
|Department:||Faculty of Engineering > Electronic and Electrical Engineering|
|Depositing user:||Miss Rachel Foster|
|Date Deposited:||13 Jul 2010 13:45|
|Last modified:||28 Apr 2016 14:27|