Application of a Temperature-Compensating FBG Sensor to Strain Measurement
A temperature-compensating fiber Bragg grating(FBG) sensor having two different FBGs in one fiber line was applied to the real time measurement of mechanical normal strain in structures. Measurement of mechanical strains of the aluminum beam surface by the double FBG sensor was performed under various thermal conditions, which was compared with results of electrical resistance strain gage. The FBG sensor fabricated in this study could detect accurately values of mechanical strains without containing any thermal strain component.
Young Won Chang, Nack J. Kim and Chong Soo Lee
D. W. Jung et al., "Application of a Temperature-Compensating FBG Sensor to Strain Measurement", Advanced Materials Research, Vols. 26-28, pp. 1089-1092, 2007