Comparative Assessment of Distributed Strain Measurement Technologies

Comparative Assessment of Distributed Strain Measurement Technologies

Kieran Pryor, Matthew Stevens, Michael Forsey, Suzana Turk

Abstract. Fibre optic (FO) distributed strain sensing technology has introduced a significant new capability for structural health monitoring (SHM). FO sensing (FOS) offers a simpler installation process with improved resistance to corrosion and electromagnetic interference compared to traditional electrical resistance foil strain gauges (FSGs) which unlike FOS is limited to single point measurements. Previous FO distributed strain measurement studies at the Defence Science and Technology Group showed good correlation between strain measurements derived from a proprietary continuous fibre grating system and FSGs. This paper compares a commercially available, non-proprietary FO sensing system and digital image correlation (DIC) against industry standard FSGs and finite element analysis (FEA) predictions.

Keywords
Fibre Optics, Continuous Fibre Gratings, Distributed Strain Measurement, Digital Image Correlation, Finite Element Analysis

Published online 2/20/2021, 8 pages
Copyright © 2021 by the author(s)
Published under license by Materials Research Forum LLC., Millersville PA, USA

Citation: Kieran Pryor, Matthew Stevens, Michael Forsey, Suzana Turk, Comparative Assessment of Distributed Strain Measurement Technologies, Materials Research Proceedings, Vol. 18, pp 21-28, 2021

DOI: https://doi.org/10.21741/9781644901311-3

The article was published as article 3 of the book Structural Health Monitoring

Content from this work may be used under the terms of the Creative Commons Attribution 3.0 licence. Any further distribution of this work must maintain attribution to the author(s) and the title of the work, journal citation and DOI.

References
[1] All Grating Fibres (AGF), 2020, FBGS, viewed 9th October 2020.
[2] Zhou, DP, Chen L & Bao X, Distributed dynamic strain measurement using optical-frequency domain reflectometry, Applied Optics, 55:24 (2016) 6735-6739. https://doi.org/10.1364/AO.55.006735
[3] Alemohammad, H 2018, ‘Opto-Mechanical Fiber Optic Sensors’, Elsevier, United Kingdom.
[4] Peter Ziros, Claire Davis, Nik Rajic.Distributed Strain Measurements using Continuous Fibre Bragg Gratings. DST-Group-TR-3473, April 2018.