Title :
Fluorescence based optical fibre fire alarm system [for aeroengine application]
Author :
Sun, T. ; Grattan, K.T.V. ; Sun, W.M.
Author_Institution :
Sch. of Eng., City Univ., London, UK
Abstract :
A fluorescence-based optical fibre fire alarm system, which offers the advantages of light weight and relatively low cost, has been discussed to address the specifications required for aeroengine fire detection. A temperature excursion as low as 50-100/spl deg/C has been detected and current spatial resolution achieved is /spl sim/20 cm. Lengths of 1.2 m of Er & Tm doped fibres have been tested and with a higher power laser diode in the future work an extension of the sensing length to the required maximum of 3 m seems possible. The referential method discussed has proved to be applicable under various testing conditions.
Keywords :
aerospace engines; aircraft control; aircraft instrumentation; alarm systems; fibre optic sensors; fires; fluorescence; temperature sensors; aeroengine fire detection; differential method; fluorescence decay signal; fluorescence lifetime; fluorescence-based system; hot spot; light weight; optical fibre fire alarm system; referential method; relatively low cost; spatial resolution; temperature excursion detection; temperature sensors; varying background; Alarm systems; Costs; Diode lasers; Erbium; Fires; Fluorescence; Optical fiber testing; Optical fibers; Spatial resolution; Temperature sensors;
Conference_Titel :
Optical Fiber Sensors Conference Technical Digest, 2002. Ofs 2002, 15th
Conference_Location :
Portland, OR, USA
Print_ISBN :
0-7803-7289-1
DOI :
10.1109/OFS.2002.1000694
