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Proceedings Paper

Tunnel monitoring using multicore fiber displacement sensor
Author(s): 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
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Paper 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.

Paper Details

Date Published: 23 May 2005
PDF: 4 pages
Proc. SPIE 5855, 17th International Conference on Optical Fibre Sensors, (23 May 2005); doi: 10.1117/12.623992
Show Author Affiliations
William N. MacPherson, Heriot-Watt Univ. (United Kingdom)
M. Silva-Lopez, Heriot-Watt Univ. (United Kingdom)
James S. Barton, Heriot-Watt Univ. (United Kingdom)
A. J. Moore, Heriot-Watt Univ. (United Kingdom)
J. D. C. Jones, Heriot-Watt Univ. (United Kingdom)
D. Zhao, Aston Univ. (United Kingdom)
Lin Zhang, Aston Univ. (United Kingdom)
Ian Bennion, Aston Univ. (United Kingdom)
Nicole Metje, The Univ. of Birmingham (United Kingdom)
C. D. F. Rogers, The Univ. of Birmingham (United Kingdom)
David N. Chapman, The Univ. of Birmingham (United Kingdom)

Published in SPIE Proceedings Vol. 5855:
17th International Conference on Optical Fibre Sensors

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