Wind turbine blade damage detection using an active sensing approach

The wind energy sector is one of the fastest growing parts of the clean energy industry. As the wind energy sector grows, so does an increasing concern for the damage detection of wind turbine blades. This paper proposes an active sensing approach by utilizing piezoceramic transducers as actuators a...

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Bibliographic Details
Published inSmart materials and structures Vol. 23; no. 10; pp. 105005 - 10
Main Authors Ruan, Jiabiao, Michael Ho, Siu Chun, Patil, Devendra, Li, Mo, Song, Gangbing
Format Journal Article
LanguageEnglish
Published Bristol IOP Publishing 01.10.2014
Institute of Physics
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Summary:The wind energy sector is one of the fastest growing parts of the clean energy industry. As the wind energy sector grows, so does an increasing concern for the damage detection of wind turbine blades. This paper proposes an active sensing approach by utilizing piezoceramic transducers as actuators and sensors. The influence of the crack quantity, location, length and depth on the wave propagation was experimentally studied. Sweep sine signals ranging from 1 khz to 50 khz were used as input signals for active sensing. The change in the energy that propagated through the cracks was verified as feasible in detecting crack-related damage. An innovative polar plot analysis method based on Fast Fourier transform was developed to compare the minuscule difference between the damage signals and the baseline signal. The polar plot was able to make apparent differences in both the magnitude and the phase of the signals, which could be correlated to crack depth and plane geometry, respectively, based on the observation of the damage.
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content type line 23
ISSN:0964-1726
1361-665X
DOI:10.1088/0964-1726/23/10/105005