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Proceedings Paper

Monitoring the rotation status of wind turbine blades using high-speed camera system
Author(s): Dongsheng Zhang; Jubing Chen; Qiang Wang; Kai Li
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Paper Abstract

The measurement of the rotating object is of great significance in engineering applications. In this study, a high-speed dual camera system based on 3D digital image correlation has been developed in order to monitor the rotation status of the wind turbine blades. The system allows sequential images acquired at a rate of 500 frames per second (fps). An improved Newton-Raphson algorithm has been proposed which enables detection movement including large rotation and translation in subpixel precision. The simulation experiments showed that this algorithm is robust to identify the movement if the rotation angle is less than 16 degrees between the adjacent images. The subpixel precision is equivalent to the normal NR algorithm, i.e.0.01 pixels in displacement. As a laboratory research, the high speed camera system was used to measure the movement of the wind turbine model which was driven by an electric fan. In the experiment, the image acquisition rate was set at 387 fps and the cameras were calibrated according to Zhang’s method. The blade was coated with randomly distributed speckles and 7 locations in the blade along the radial direction were selected. The displacement components of these 7 locations were measured with the proposed method. Conclusion is drawn that the proposed DIC algorithm is suitable for large rotation detection, and the high-speed dual camera system is a promising, economic method in health diagnose of wind turbine blades.

Paper Details

Date Published: 22 June 2013
PDF: 6 pages
Proc. SPIE 8769, International Conference on Optics in Precision Engineering and Nanotechnology (icOPEN2013), 876916 (22 June 2013); doi: 10.1117/12.2018929
Show Author Affiliations
Dongsheng Zhang, Shanghai Univ. (China)
Shanghai Key Lab. of Mechanics in Energy Engineering (China)
Jubing Chen, Shanghai Jiao Tong Univ. (China)
Qiang Wang, Shanghai Univ. (China)
Shanghai Key Lab. of Mechanics in Energy Engineering (China)
Kai Li, Shanghai Univ. (China)
Shanghai Key Lab. of Mechanics in Energy Engineering (China)


Published in SPIE Proceedings Vol. 8769:
International Conference on Optics in Precision Engineering and Nanotechnology (icOPEN2013)
Chenggen Quan; Kemao Qian; Anand Asundi, Editor(s)

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