Metal-packaged fibre Bragg grating strain sensors for surface-mounting onto spalled concrete wind turbine foundations

M. Perry; G. Fusiek; I. McKeeman; P. Niewczas; M. Saafi

doi:10.1117/12.2190188

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28 September 2015 Metal-packaged fibre Bragg grating strain sensors for surface-mounting onto spalled concrete wind turbine foundations

M. Perry, G. Fusiek, I. McKeeman, P. Niewczas, M. Saafi

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Proceedings Volume 9634, 24th International Conference on Optical Fibre Sensors; 963466 (2015) https://doi.org/10.1117/12.2190188
Event: International Conference on Optical Fibre Sensors (OFS24), 2015, Curitiba, Brazil

Abstract

In this work, we demonstrate preliminary results for a hermetically sealed, metal-packaged fibre Bragg grating strain sensor for monitoring existing concrete wind turbine foundations. As the sensor is bolted to the sub-surface of the concrete, it is suitable for mounting onto uneven, wet and degraded surfaces, which may be found in buried foundations. The sensor was able to provide reliable measurements of concrete beam strain during cyclic three- and four- point bend tests. The strain sensitivity of the prototype sensor is currently 10 % of that of commercial, epoxied fibre strain sensors.

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M. Perry, G. Fusiek, I. McKeeman, P. Niewczas, and M. Saafi "Metal-packaged fibre Bragg grating strain sensors for surface-mounting onto spalled concrete wind turbine foundations", Proc. SPIE 9634, 24th International Conference on Optical Fibre Sensors, 963466 (28 September 2015); https://doi.org/10.1117/12.2190188

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