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Proceedings Paper

Real-time monitoring system for multi-MW scale wind blades using FBG sensors
Author(s): Hongwei Liu; Zhichun Zhang; Hongbo Jia; Denggang Zhang; Yanju Liu; Jinsong Leng
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Paper Abstract

Measured by distributed fiber Bragg grating (FBG) sensors, an application and strain analysis of real-time structural health monitoring system for muti-MW scale wind blades during the service process has been established and investigated. The experiments of the multi-MW scale wind turbine were performed at the top of the hill, near the sea and the FBG sensors were mounted at various locations on the internal surfaces of the rotating blades. The feasibility and effectiveness of the system were validated by continuously transmitting the optical signals between the FBG demodulator and the sensors. The internal dynamic strain of the blades during the environmental fatigue loadings were monitored, valuated and given crash alert with FBG sensors through the results of preliminary field tests. Through Hilbert-Huang transform (HHT), the strain data were decomposed into a series of intrinsic mode functions (IMF) and residual component by the empirical mode decomposition (EMD) method under different frequencies.

Paper Details

Date Published: 1 April 2019
PDF: 8 pages
Proc. SPIE 10972, Health Monitoring of Structural and Biological Systems XIII, 109721O (1 April 2019); doi: 10.1117/12.2514675
Show Author Affiliations
Hongwei Liu, Harbin Institute of Technology (China)
Zhichun Zhang, Harbin Institute of Technology (China)
Hongbo Jia, Harbin Institute of Technology (China)
Denggang Zhang, Zhongguancun Dongsheng Technology Park (China)
Yanju Liu, Harbin Institute of Technology (China)
Jinsong Leng, Harbin Institute of Technology (China)

Published in SPIE Proceedings Vol. 10972:
Health Monitoring of Structural and Biological Systems XIII
Paul Fromme; Zhongqing Su, Editor(s)

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