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24 September 1998 Multiplexing of fiber optic sensors for stress measurements in civil engineering applications
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Abstract
We present a polarimetric and interferometric fiber-optic sensor systems employing highly birefringent fibers for stress monitoring in civil engineering applications. Both systems are designed to be used with concrete-embeddable pressure c ells, optimized for stress measurement inside a concrete medium and equipped with a direct read-out of its inside pressure using an internally incorporated all-fiber sensor. In its present form the polarimetric system contains up to four space division multiplexed sensors. An overall system accuracy, including temperature drift in a wide range of temperatures is better than 1% at pressures up to 40 MPa. A concept of coherence multiplexing was applied in the interferometric system. We built and tested the system composed of three serially connected temperature-compensated pressure sensors.
© (1998) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Wojtek J. Bock, Waclaw Urbanczyk, Marc R. H. Voet, and Andrzej Barwicz "Multiplexing of fiber optic sensors for stress measurements in civil engineering applications", Proc. SPIE 3414, Opto-Contact: Workshop on Technology Transfers, Start-Up Opportunities,and Strategic Alliances, (24 September 1998); https://doi.org/10.1117/12.323513
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