Multiplexing of fiber optic sensors for stress measurements in civil engineering applications

Wojtek J. Bock; Waclaw Urbanczyk; Marc R. H. Voet; Andrzej Barwicz

doi:10.1117/12.323513

24 September 1998 Multiplexing of fiber optic sensors for stress measurements in civil engineering applications

Wojtek J. Bock, Waclaw Urbanczyk, Marc R. H. Voet, Andrzej Barwicz

Proceedings Volume 3414, Opto-Contact: Workshop on Technology Transfers, Start-Up Opportunities,and Strategic Alliances; (1998) https://doi.org/10.1117/12.323513
Event: Lasers and Materials in Industry and Opto-Contact Workshop, 1998, Quebec, Canada

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.

Citation Download Citation

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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