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Distributed Strain Sensing from Different Optical Fiber Configurations

Department of Aerospace Engineering, Mississippi State University, Starkville, MS 39759, USA
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Inventions 2018, 3(4), 67; https://doi.org/10.3390/inventions3040067
Received: 4 September 2018 / Revised: 19 September 2018 / Accepted: 21 September 2018 / Published: 25 September 2018
(This article belongs to the Special Issue Structural Health Monitoring and Their Applications Across Industry)
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Abstract

Strain distributions were obtained from optical fibers arranged in three different configurations on transversely-loaded cantilevered beams. Traditional strain measurement sensors, such as strain gauges, are limited to measuring strain at discrete points on a structural member. However, distributed optical fibers can measure high spatial (<1 mm spacing) strain or temperature distributions. In this study, optical fibers in spiral, grid, and rosette configurations were bonded to aluminum cantilevered beams subjected to tip loads. Strain distributions from optical fiber sensors were measured using a swept wavelength coherent interferometric technique. The optical fiber strain measurements show good agreement with strain gauge measurements. The attributes of each sensor configuration are discussed. View Full-Text
Keywords: distributed optical fiber sensing; optical fiber strain gauge patterns; optical rosette sensor; optical grid sensor; optical spiral sensor distributed optical fiber sensing; optical fiber strain gauge patterns; optical rosette sensor; optical grid sensor; optical spiral sensor
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited (CC BY 4.0).
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Drake, D.A.; Sullivan, R.W.; Wilson, J.C. Distributed Strain Sensing from Different Optical Fiber Configurations. Inventions 2018, 3, 67.

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