A comparison of brazed metal and epoxied fibre Bragg grating strain sensors under high strain regimes

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Mckeeman, Iain James and Niewczas, Pawel and Khan, Saadat; (2017) A comparison of brazed metal and epoxied fibre Bragg grating strain sensors under high strain regimes. In: 25th International Conference on Optical Fiber Sensors. Proceedings of SPIE - The International Society for Optical Engineering, Bellingham, WA. ISBN 9781510610910 (https://doi.org/10.1117/12.2264997)

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Abstract

Three different fibre Bragg grating strain sensors were tested for their suitability for measuring high strain. The sensor types were: a bare epoxied fibre Bragg grating, a standard fibre Bragg grating epoxied into a metal capillary and, finally, a metal coated fibre Bragg grating brazed into a metal capillary. The sensors were calibrated on a steel specimen up to 1400MPa (equivalent to 7.3mε). The results show that the bare epoxied Bragg grating and the metal packaged grating are suitable for measuring strains of this level.

ORCID iDs

Mckeeman, Iain James ORCID logoORCID: https://orcid.org/0000-0002-9923-2922, Niewczas, Pawel ORCID logoORCID: https://orcid.org/0000-0003-3291-1725 and Khan, Saadat;
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