Title :
Embedded optical fibre Bragg gratings for aerospace monitoring
Author :
Dockney, M.L. ; Read, I.J. ; Foote, P.D. ; Tatam, R.P.
Author_Institution :
Centre for Photonics & Opt. Eng., Cranfield Univ., Bedford, UK
Abstract :
In-fibre Bragg gratings have been embedded into an aerospace carbon fibre composite material for the purpose of quantitative dc strain measurement. Using a three-point bend test, the theoretical strain applied to a carbon fibre test beam was compared to strain measurements made by five surface mounted strain gauges and twenty embedded fibre gratings. The gratings were written around 830 nm into two types of commercial fibre and both unjacketed and recoated grating sensors were investigated
Keywords :
intelligent structures; 830 nm; C; C fibre composite; aerospace monitoring; composite beam; embedded optical fibre Bragg gratings; grating interrogation system; in-fibre Bragg gratings; inherent spectral encoding; quantitative dc strain measurement; quasi-distributed sensor networks; recoated grating sensors; smart structures; strain sensitivity; three-point bend test; unjacketed grating sensors;
Conference_Titel :
Optical Techniques for Smart Structures and Structural Mmonitoring (Digest No. 1997/033), IEE Colloquium on
Conference_Location :
London
DOI :
10.1049/ic:19970206
