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Proceedings Paper

A Hydrogen Fire Detection System Using A Thermal Imaging System And Its Application To Space Launch Vehicles
Author(s): Brian Harper; Tim Norman
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Paper Abstract

Hydrogen fires emit near zero radiation in the visible waveband : in daylight they are virtually invisible. This is a major safety hazard particularly in the aerospace industry where hydrogen is used as a rocket propellant. A practical imaging system has been constructed to detect non-visible radiation that these fires give off. The emission spectra, atmospheric transmission, background emission and reflection have been quantified under many conditions. This shows thermal wavelengths are well suited for this application. A low cost, uncooled, staring array TV compatible thermal imager has been optimised for this. The resultant image is 'punched through' to superimpose the flame on a bore-sighted visual TV picture. The theory and operation of the imager are explained.

Paper Details

Date Published: 1 April 1990
PDF: 13 pages
Proc. SPIE 1191, Optical Systems for Space and Defence, (1 April 1990); doi: 10.1117/12.969703
Show Author Affiliations
Brian Harper, Insight Vision Systems Ltd (United Kingdom)
Tim Norman, Insight Vision Systems Ltd (United Kingdom)


Published in SPIE Proceedings Vol. 1191:
Optical Systems for Space and Defence

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