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Proceedings Paper

Displacement measurement by sensor unit with a pair of crossed optical fibers
Author(s): Hiroshi Naruse; Yoshinori Yoshikawa; Gabriel Arevalo; Juan P. Gonzalez; Alejandra Alvarez; Luis Mujica
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Paper 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.

Paper Details

Date Published: 5 October 2009
PDF: 4 pages
Proc. SPIE 7503, 20th International Conference on Optical Fibre Sensors, 75033U (5 October 2009); doi: 10.1117/12.835320
Show Author Affiliations
Hiroshi Naruse, Mie Univ. (Japan)
Yoshinori Yoshikawa, Mie Univ. (Japan)
Gabriel Arevalo, Micomo (Chile)
Juan P. Gonzalez, Micomo (Chile)
Alejandra Alvarez, Micomo (Chile)
Luis Mujica, Micomo (Chile)


Published in SPIE Proceedings Vol. 7503:
20th International Conference on Optical Fibre Sensors
Julian D. C. Jones, Editor(s)

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