Simultaneous measurement of two strain components using passive demodulation

Yu-Lung Lo; James S. Sirkis

doi:10.1117/12.173988

1 May 1994 Simultaneous measurement of two strain components using passive demodulation

Yu-Lung Lo, James S. Sirkis

Proceedings Volume 2191, Smart Structures and Materials 1994: Smart Sensing, Processing, and Instrumentation; (1994) https://doi.org/10.1117/12.173988
Event: 1994 North American Conference on Smart Structures and Materials, 1994, Orlando, FL, United States

Abstract

This paper uses 3 X 3 coupler passive demodulation of combined Michelson and polarimetric optical fiber sensors to simultaneously measure axial and transverse strain components in a single optical fiber bonded to a vibrating cantilever beam. The separated Michelson and polarimetric signals are used with isothermal Michelson and polarimetric phase strain-models to provide two independent equations describing the strain in the fiber. These equations provide enough information to calculate axial and transverse strains in surface mounted sensors.

Citation Download Citation

Yu-Lung Lo and James S. Sirkis "Simultaneous measurement of two strain components using passive demodulation", Proc. SPIE 2191, Smart Structures and Materials 1994: Smart Sensing, Processing, and Instrumentation, (1 May 1994); https://doi.org/10.1117/12.173988

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