31 May 1999 Evaluation of a low-cost optical-fiber-based strain sensor
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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.
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D. C. Inder, D. C. Inder, M. A. Buckley, M. A. Buckley, Tonguy Liu, Tonguy Liu, Gerard Franklyn Fernando, Gerard Franklyn Fernando, } "Evaluation of a low-cost optical-fiber-based strain sensor", 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; https://doi.org/10.1117/12.349731
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