Detection of high level carbon dioxide emissions using a compact optical fibre based mid-infrared sensor system for applications in environmental pollution monitoring

A novel and highly compact optical fibre based sensor system for measurement of high concentrations CO2 gas emissions in modern automotive exhaust is presented. The sensor system works based on the principle of open-path direct absorption spectroscopy in the mid-infrared wavelength range. The sensor...

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Bibliographic Details
Published in:Journal of physics. Conference series 2009-07, Vol.178 (1), p.012008
Main Authors: Muda, R, Lewis, E, O'Keeffe, S, Dooly, G, Clifford, J
Format: Article
Language:English
Subjects:
Automobiles
Calcium fluoride
Carbon dioxide
Exhaust gases
Exhaust systems
Flue gas
Gas analyzers
Gases
Infrared detectors
Optical fibers
Physics
Pollution monitoring
Sensors
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Summary:A novel and highly compact optical fibre based sensor system for measurement of high concentrations CO2 gas emissions in modern automotive exhaust is presented. The sensor system works based on the principle of open-path direct absorption spectroscopy in the mid-infrared wavelength range. The sensor system, which comprises low cost components and is compact in design, is well suited for applications in monitoring CO2 emissions from the exhaust of automotive vehicles. The sensor system utilises calcium fluoride (CaF2) lenses and a narrow band pass (NBP) filter for detection of CO2 gas. The response of the sensor to high concentrations of CO2 gas is presented and the result is compared with that of a commercial flue gas analyser. The sensor shows response times of 5.2s and demonstrates minimal susceptibility to cross interferences of other gases present in the exhaust system.
ISSN:1742-6596
1742-6588
1742-6596
DOI:10.1088/1742-6596/178/1/012008