Tunnel monitoring using multicore fiber displacement sensor

William N. MacPherson; M. Silva-Lopez; James S. Barton; A. J. Moore; J. D. C. Jones; D. Zhao; Lin Zhang; Ian Bennion; Nicole Metje; C. D. F. Rogers; David N. Chapman

doi:10.1117/12.623992

23 May 2005 Tunnel monitoring using multicore fiber displacement sensor

William N. MacPherson, M. Silva-Lopez, James S. Barton, A. J. Moore, J. D. C. Jones, D. Zhao, Lin Zhang, Ian Bennion, Nicole Metje, C. D. F. Rogers, David N. Chapman

Author Affiliations +

Proceedings Volume 5855, 17th International Conference on Optical Fibre Sensors; (2005) https://doi.org/10.1117/12.623992
Event: 17th International Conference on Optical Fibre Sensors, 2005, Bruges, Belgium

Abstract

We describe the first application of multiplexed fibre Bragg grating strain sensors in a multicore fibre. Sets of gratings, acting as strain gauges, are co-located in the multicore fibre such that they enable the curvature to be measured. Multiple sets of these gratings allow the curvature to be measured at several points along the fibre. This sensor is configured to monitor displacement of concrete tunnel sections, and was demonstrated capable of displacement measurement with a resolution of ±0.1 mm over a range of several millimeters.

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William N. MacPherson, M. Silva-Lopez, James S. Barton, A. J. Moore, J. D. C. Jones, D. Zhao, Lin Zhang, Ian Bennion, Nicole Metje, C. D. F. Rogers, and David N. Chapman "Tunnel monitoring using multicore fiber displacement sensor", Proc. SPIE 5855, 17th International Conference on Optical Fibre Sensors, (23 May 2005); https://doi.org/10.1117/12.623992

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