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An Embeddable Strain Sensor with 30 Nano-Strain Resolution Based on Optical Interferometry
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Inventions 2018, 3(2), 30; https://doi.org/10.3390/inventions3020030

A Uniform Strain Transfer Scheme for Accurate Distributed Optical Fiber Strain Measurements in Civil Structures

1
Department of Electrical and Computer Engineering, Missouri University of Science and Technology, Rolla, MO 65409, USA
2
American Inventor Institute, Willow Spring, IL 60480, USA
*
Author to whom correspondence should be addressed.
Received: 4 March 2018 / Revised: 14 May 2018 / Accepted: 16 May 2018 / Published: 20 May 2018
(This article belongs to the Special Issue Structural Health Monitoring and Their Applications Across Industry)
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Abstract

We report a screw-like package design for an embeddable distributed optical fiber strain sensor for civil engineering applications. The screw-like structure is the exterior support for an optical fiber sensor. The bare optical fiber is embedded and secured in a longitudinal groove of the screw-like package using a rigid adhesive. Our packaging scheme prevents damage to the bare optical fiber and ensures that the packaged sensor is accurately and optimally sensing strain fields in civil structures. Moreover, our screw-like design has an equal area in a cross-section perpendicular to and along the screw axis, so strain field distributions are metered faithfully along the length of the embedded optical fiber. Our novel screw-like package optical fiber sensor, interfaced to a Rayleigh scattering-based optical frequency domain reflectometer system enables undistorted, accurate, robust, and spatially-distributed strain measurements in bridges, tunnels, pipelines, buildings, etc. along structural dimensions extending from centimeters to kilometers. View Full-Text
Keywords: screw-like structure; strain transfer; distributed; strain measurements; fiber optics screw-like structure; strain transfer; distributed; strain measurements; fiber optics
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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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Du, Y.; Chen, Y.; Zhuang, Y.; Zhu, C.; Gerald, R.E., II; Huang, J. A Uniform Strain Transfer Scheme for Accurate Distributed Optical Fiber Strain Measurements in Civil Structures. Inventions 2018, 3, 30.

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