Abstract
A novel technique for simultaneous measurement of static strain,temperature and vibration in health monitoring of structures is demonstratedusing an integrated in-fibre Bragg grating (FBG)/extrinsic Fabry-Pérotinterferometer (EFPI) sensor. The EFPI sensor provides static strain andvibration information simultaneously by using the channel-spectrum methodand the low-coherence interferometric technique, respectively. The FBGsensor is used for temperature measurement. The experimental results showthat a static-strain accuracy of ±20µε, a temperatureaccuracy of ±1°C and a vibration resolution of 1 nm havebeen achieved with a good repeatability.
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