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Proceedings Paper

A fibre Bragg grating-based inclinometer system for ground movement measurement
Author(s): Jin Li; Ricardo Correia; Edmond Chehura; Stephen Staines; Stephen W. James; Ralph P. Tatam
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Paper Abstract

The measurement of ground movement is an essential part of many geotechnical engineering operations. For decades, inclinometer systems have traditionally been used for this purpose to provide crucial information to engineers and researchers. However, conventional inclinometer systems have their limitations, such as high cost and poor durability. In this paper a fibre optic based inclinometer system is reported, which utilizes fibre Bragg grating sensors attached to the casing of a conventional inclinometer. The characterization of the sensor revealed good agreement with theory and conventional displacement measurements. For a casing of length 2.5 m, the minimum measureable deflection of the top of the casing was found to be 0.48 mm when the FBGs were interrogated with a 1 pm wavelength resolution system.

Paper Details

Date Published: 8 September 2010
PDF: 4 pages
Proc. SPIE 7653, Fourth European Workshop on Optical Fibre Sensors, 765314 (8 September 2010); doi: 10.1117/12.866334
Show Author Affiliations
Jin Li, Cranfield Univ. (United Kingdom)
Ricardo Correia, Cranfield Univ. (United Kingdom)
Edmond Chehura, Cranfield Univ. (United Kingdom)
Stephen Staines, Cranfield Univ. (United Kingdom)
Stephen W. James, Cranfield Univ. (United Kingdom)
Ralph P. Tatam, Cranfield Univ. (United Kingdom)

Published in SPIE Proceedings Vol. 7653:
Fourth European Workshop on Optical Fibre Sensors
José Luís Santos; Brian Culshaw; José Miguel López-Higuera; William N. MacPherson, Editor(s)

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