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Proceedings Paper

Evaluation of a low-cost optical-fiber-based strain sensor
Author(s): D. C. Inder; M. A. Buckley; Tonguy Liu; Gerard Franklyn Fernando
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Paper Abstract

With the increasing recognition that optical fiber-based sensor systems are ideal for structural health monitoring, there is a demand for a low-cost sensor. This paper reports on recent progress in the design, manufacture and evaluation of an intensity-based optical fiber strain sensor. The proposed sensor is referred to as the 'profile' sensor and it is made by deforming (tapering) a section of optical fiber using a standard fiber fusion splicer. Up to three profiles were made on a single fiber length and the attenuation during this process was monitored. The sensors were photographed to estimate the dimensions of the profile and then tensile tested by attaching the profile sensor to a micrometer stage. The sensors were strained via the micrometer stage in an incremental manner and the light transmission was monitored during this operation. An increase in the light transmission characteristics was observed during tensile loading. A good correlation was obtained between the experimental results and the predicted values.

Paper Details

Date Published: 31 May 1999
PDF: 7 pages
Proc. SPIE 3670, Smart Structures and Materials 1999: Sensory Phenomena and Measurement Instrumentation for Smart Structures and Materials, (31 May 1999); doi: 10.1117/12.349731
Show Author Affiliations
D. C. Inder, Urenco Ltd. (United Kingdom)
M. A. Buckley, Cranfield Univ. (United Kingdom)
Tonguy Liu, Cranfield Univ. (United Kingdom)
Gerard Franklyn Fernando, Cranfield Univ. (United Kingdom)


Published in SPIE Proceedings Vol. 3670:
Smart Structures and Materials 1999: Sensory Phenomena and Measurement Instrumentation for Smart Structures and Materials
Richard O. Claus; William B. Spillman, Editor(s)

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