Remote gas sensing in full-scale fire with sub-terahertz waves

A remote gas sensor based on a continuous-wave sub-terahertz spectrometer with an operation bandwidth between 200 and 500 GHz has been developed. The performance of the developed system was investigated in a full-scale fire. The measured transmission spectra of smoke show the existence of hydrogen c...

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Bibliographic Details
Main Authors: Shimizu, N., Ikari, T., Kikuchi, Kenichi, Matsuyama, K., Wakatsuki, A., Kohjiro, S., Fukasawa, R.
Format: Conference Proceeding
Language:English
Subjects:
Absorption
Fires
gas detector
Gases
Mixers
optical mixing
Receivers
remote sensing
Sensors
submillimeter wave measurements
Testing
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Summary:A remote gas sensor based on a continuous-wave sub-terahertz spectrometer with an operation bandwidth between 200 and 500 GHz has been developed. The performance of the developed system was investigated in a full-scale fire. The measured transmission spectra of smoke show the existence of hydrogen cyanide (HCN) and water molecules, which were generated due to the combustion of a foam urethane block. The HCN content estimated from the absorption intensity agrees quite well with that obtained from the chemical analysis of gases sampled from the fire site. These results demonstrate the potential of the developed sensing system as a remote toxic gas sensor at disaster sites.
ISSN:0149-645X
2576-7216
DOI:10.1109/MWSYM.2011.5972655