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Proceedings Paper

Strain monitoring in power cables of offshore wind energy plants with femtosecond laser inscribed fibre Bragg gratings
Author(s): Jörg Burgmeier; Peter Funken; Wolfgang Schade
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Paper Abstract

A fibre Bragg grating sensor system used for monitoring of strain being effective on the power cable of an offshore wind turbine is presented. The Bragg grating structure was inscribed in coated non-photosensitive standard telecommunication fibres using an infrared femtosecond laser and the point-by-point writing technique. Due to the presence of the protective coating of the fibre, the mechanical stability of the resultant sensor device is better than that of a sensor consisting of a bare fibre. A system containing this sensing element was successfully installed and tested in an offshore wind turbine prototype (REpower 6M) in February 2010, near Ellhöft (Germany). The fabrication process of the fibre Bragg gratings, a comparison between the sensor signal and a commonly used strain gauge and measurement results of the online monitoring are presented.

Paper Details

Date Published: 18 May 2011
PDF: 4 pages
Proc. SPIE 7753, 21st International Conference on Optical Fiber Sensors, 775382 (18 May 2011); doi: 10.1117/12.886061
Show Author Affiliations
Jörg Burgmeier, Technische Univ. Clausthal (Germany)
Peter Funken, Draka Industrial Cable GmbH (Germany)
Wolfgang Schade, Technische Univ. Clausthal (Germany)
Fraunhofer Heinrich Hertz Institute (Germany)

Published in SPIE Proceedings Vol. 7753:
21st International Conference on Optical Fiber Sensors
Jacques Albert; Wojtek J. Bock, Editor(s)

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