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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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.

Original languageEnglish
Title of host publicationProceedings of SPIE - The International Society for Optical Engineering
EditorsHypolito J. Kalinowski, José Luís Fabris, Wojtek J. Bock
Number of pages4
Volume9634
DOIs
Publication statusPublished - 28 Sep 2015
Event24th International Conference on Optical Fibre Sensors - Brazil, Curitiba, Brazil
Duration: 28 Sep 20152 Oct 2015

Conference

Conference24th International Conference on Optical Fibre Sensors
CountryBrazil
CityCuritiba
Period28/09/152/10/15

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Keywords

  • concrete foundations
  • cracking
  • fibre Bragg gratings
  • structural health monitoring
  • wind turbines

Cite this

Perry, M., Fusiek, G., McKeeman, I., Niewczas, P., & Saafi, M. (2015). Metal-Packaged fibre Bragg grating strain sensors for surface mounting onto spalled concrete wind turbine foundations. In H. J. Kalinowski, J. L. Fabris, & W. J. Bock (Eds.), Proceedings of SPIE - The International Society for Optical Engineering (Vol. 9634). [963466] https://doi.org/10.1117/12.2190188