Displacement measurement by sensor unit with a pair of crossed optical fibers

Hiroshi Naruse; Yoshinori Yoshikawa; Gabriel Arevalo; Juan P. Gonzalez; Alejandra Alvarez; Luis Mujica

doi:10.1117/12.835320

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5 October 2009 Displacement measurement by sensor unit with a pair of crossed optical fibers

Hiroshi Naruse, Yoshinori Yoshikawa, Gabriel Arevalo, Juan P. Gonzalez, Alejandra Alvarez, Luis Mujica

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Proceedings Volume 7503, 20th International Conference on Optical Fibre Sensors; 75033U (2009) https://doi.org/10.1117/12.835320
Event: 20th International Conference on Optical Fibre Sensors, 2009, Edinburgh, United Kingdom

Abstract

We have been researching a displacement measurement system for monitoring rock damage such as cracks in tunnel walls and pillars in an underground mine. The system consists of a displacement sensor unit with a pair of crossed optical fibers and a distributed fiber optic strain measuring device. The strain measuring device measures displacement-induced strains in the optical fibers and, from these measured strains, displacements in two directions are obtained. We analyzed the influence of the strain measurement error and sensor unit configuration on the displacement measurement. Moreover, we confirmed the usefulness of displacement measurement by the sensor unit through experiments using a prototype.

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Hiroshi Naruse, Yoshinori Yoshikawa, Gabriel Arevalo, Juan P. Gonzalez, Alejandra Alvarez, and Luis Mujica "Displacement measurement by sensor unit with a pair of crossed optical fibers", Proc. SPIE 7503, 20th International Conference on Optical Fibre Sensors, 75033U (5 October 2009); https://doi.org/10.1117/12.835320

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