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Article

Evaluating the Performance of Functionalized Carbon Structures with Integrated Optical Fiber Sensors under Practical Conditions

1
Hannover Centre for Optical Technologies (HOT), Leibniz University Hannover, 30167 Hannover, Germany
2
School of Engineering and the Built Environment, Edinburgh Napier University, Edinburgh EH11 4BN, UK
3
Saxon Textile Research Institute (STFI), 09125 Chemnitz, Germany
4
Materialforschungs-und-Prüfanstalt an der Bauhaus-Universität Weimar (MFPA), 99423 Weimar, Germany
*
Author to whom correspondence should be addressed.
Sensors 2018, 18(11), 3923; https://doi.org/10.3390/s18113923
Received: 22 October 2018 / Revised: 9 November 2018 / Accepted: 12 November 2018 / Published: 14 November 2018
(This article belongs to the Special Issue State-of-the-Art Sensors Technology in Germany)
An Optical Frequency Domain Reflectometry (OFDR) based fiber optic sensor scheme “embedded” in concrete for the purpose of structural health monitoring (SHM) of carbon concrete composites (C3) is presented. The design, while strengthening the concrete structure, also aims to monitor common SHM parameters such as strain and cracks. This was achieved by weaving the carbon fiber together with optical fiber, based on a specialized technique that uses an embroidery setup where both the carbon and optical fiber are woven on a water dissolvable polymer substrate. The performance of the sensing scheme was characterized in-situ utilizing the OFDR based technique and the results presented. The sensors embedded on a custom made concrete block were subjected to varying strain via a three point bending test to destruction and the results discussed. The intended dual-achievement of the scheme thus proposed in SHM and strengthening the C3 is demonstrated. The suitability of the OFDR scheme for C3 is combined with a fibre Bragg grating (FBG)-based approach, and discussed in detail. View Full-Text
Keywords: carbon concrete composite; structural health monitoring; optical frequency domain reflectometry; fibre Bragg grating; strain measurement carbon concrete composite; structural health monitoring; optical frequency domain reflectometry; fibre Bragg grating; strain measurement
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MDPI and ACS Style

Bremer, K.; Alwis, L.S.M.; Weigand, F.; Kuhne, M.; Zheng, Y.; Krüger, M.; Helbig, R.; Roth, B. Evaluating the Performance of Functionalized Carbon Structures with Integrated Optical Fiber Sensors under Practical Conditions. Sensors 2018, 18, 3923. https://doi.org/10.3390/s18113923

AMA Style

Bremer K, Alwis LSM, Weigand F, Kuhne M, Zheng Y, Krüger M, Helbig R, Roth B. Evaluating the Performance of Functionalized Carbon Structures with Integrated Optical Fiber Sensors under Practical Conditions. Sensors. 2018; 18(11):3923. https://doi.org/10.3390/s18113923

Chicago/Turabian Style

Bremer, Kort, Lourdes S.M. Alwis, Frank Weigand, Michael Kuhne, Yulong Zheng, Marco Krüger, Reinhard Helbig, and Bernhard Roth. 2018. "Evaluating the Performance of Functionalized Carbon Structures with Integrated Optical Fiber Sensors under Practical Conditions" Sensors 18, no. 11: 3923. https://doi.org/10.3390/s18113923

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