Radar imaging system for in-service wind turbine blades inspections : initial results from a field installation at a 2 mw wind turbine

  • This paper presents an imaging radar system for structural health monitoring (SHM) of wind turbine blades. The imaging radar system developed here is based on two frequency modulated continuous wave (FMCW) radar sensors with a high output power of 30 dBm. They have been developed for the frequency bands of 24,05 GHz-24,25 GHz and 33.4 GHz-36.0 GHz, respectively. Following the successful proof of damage detection and localization in laboratory conditions, we present here the installation of the sensor system at the tower of a 2 MW wind energy plant at 95 m above ground. The realization of the SHM-system will be introduced including the sensor system, the data acquisition framework and the signal processing procedures. We have achieved an imaging of the rotor blades using inverse synthetic aperture radar techniques under changing environmental and operational condition. On top of that, it was demonstrated that the front wall and back wall radar echo can be extracted from the measured signals demonstrating the full penetration of wind turbine blades during operation.

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Author:Jochen Moll, Jonas Simon, Moritz Mälzer, Viktor KrozerORCiDGND, Dimitry Pozdniakov, Rahmi Salman, Manfred Dürr, Michael Feulner, Andreas Nuber, Herbert Friedmann
Parent Title (English):Progress in electromagnetics research
Publisher:Elsevier Science Publ. Co.
Place of publication:New York, NY [u. a.]
Document Type:Article
Year of Completion:2018
Date of first Publication:2018/06/04
Publishing Institution:Universitätsbibliothek Johann Christian Senckenberg
Release Date:2018/08/14
Page Number:10
First Page:51
Last Page:60
© Copyright 2017 EMW Publishing. All Rights Reserved
Institutes:Physik / Physik
Dewey Decimal Classification:5 Naturwissenschaften und Mathematik / 53 Physik / 530 Physik
Licence (German):License LogoDeutsches Urheberrecht