Bragg grating-based fibre optic sensors in structural health monitoring.
This work first considers a review of the dominant current methods for fibre Bragg grating wavelength interrogation. These methods include WDM interferometry, tunable filter (both Fabry-Perot and acousto-optic) demultiplexing, CCD/prism technique and a newer hybrid method utilizing Fabry-Perot and interferometric techniques. Two applications using these techniques are described: hull loads monitoring on an all-composite fast patrol boat and bolt pre-load loss monitoring in a composite beam in conjunction with a state-space modelling data analysis technique.
Todd
Michael D
MD
Department of Structural Engineering, University of California San Diego, 9500 Gilman Drive, Mail Code 0085, La Jolla, CA 92093-0085, USA. mdt@ucsd.edu
Nichols
Jonathan M
JM
Trickey
Stephen T
ST
Seaver
Mark
M
Nichols
Christy J
CJ
Virgin
Lawrence N
LN
D003252:Construction Materials / Q000032:analysis*; D004738:Engineering / Q000295:instrumentation* / Q000379:methods; D004867:Equipment Design; D004868:Equipment Failure; D019544:Equipment Failure Analysis / Q000295:instrumentation* / Q000379:methods; D005336:Fiber Optic Technology / Q000295:instrumentation*; D008283:Maintenance / Q000379:methods; D012031:Refractometry / Q000295:instrumentation* / Q000379:methods; D014159:Transducers