Simultaneous strain, temperature, and vibration measurement using a multiplexed FBG/FFPI sensor system

Yun-Jiang Rao; Philip J. Henderson; David A. Jackson; Lin Zhang; Ian Bennion

doi:10.1117/12.316989

21 July 1998 Simultaneous strain, temperature, and vibration measurement using a multiplexed FBG/FFPI sensor system

Yun-Jiang Rao, Philip J. Henderson, David A. Jackson, Lin Zhang, Ian Bennion

Proceedings Volume 3330, Smart Structures and Materials 1998: Sensory Phenomena and Measurement Instrumentation for Smart Structures and Materials; (1998) https://doi.org/10.1117/12.316989
Event: 5th Annual International Symposium on Smart Structures and Materials, 1998, San Diego, CA, United States

Abstract

A novel technique for simultaneous measurement of static- strain, temperature and vibration for structural health monitoring is demonstrated using a wavelength-multiplexed in-fiber-Bragg-grating (FBG)/fiber-Fabry-Perot- interferometer (FFPI) sensor system, which combines the advantages of both FBGs and fiber-optic low-coherence interferometry. An experimental system, including two 1m long FFPIs with central wavelengths of 1531nm and 1534nm and a FBG with a central wavelength of 1555nm, is demonstrated. A static strain resolution of better than 1 (mu) (epsilon) , a temperature sensitivity of 0.1 degrees C and a vibration amplitude sensitivity of better than 1nm/(root) Hz have been obtained. The system cross-talk measured is less than -50dB.

Citation Download Citation

Yun-Jiang Rao, Philip J. Henderson, David A. Jackson, Lin Zhang, and Ian Bennion "Simultaneous strain, temperature, and vibration measurement using a multiplexed FBG/FFPI sensor system", Proc. SPIE 3330, Smart Structures and Materials 1998: Sensory Phenomena and Measurement Instrumentation for Smart Structures and Materials, (21 July 1998); https://doi.org/10.1117/12.316989

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