FBG sensor system for condition monitoring of wind turbine blades

Author(s):  
Dae-Gil Kim ◽  
Hyunjin Kim ◽  
Minho Song
2011 ◽  
Vol 109 ◽  
pp. 79-83 ◽  
Author(s):  
Hyung Joon Bang ◽  
Soo Hyun Kim

This paper introduces a FBG (fiber Bragg grating) based AE (acoustic emission) sensing system for use in health monitoring of composite wind turbine blades. In this study, a multiplexing high speed FBG sensor system was developed with a spectrometer-type demodulator based on a linear photo detector. Pencil break test was performed using an FBG sensor and the results were compared with the results of piezo-based AE sensor. For the performance test of fracture sensing in composite materials, a down-scaled wind turbine blade was fabricated and drop impact tests were performed. Arrayed 4 FBG sensors were installed in the skin of wind turbine blade and impacts of 15 J energy were applied by a drop weight. The frequency characteristics of impact induced AE signals were examined with short-time Fourier transform focused on the leading waves. Finally, the onset of fractures in composite structure was successfully assessed using arrayed FBG sensors.


2019 ◽  
Vol 189 ◽  
pp. 25-34 ◽  
Author(s):  
Ahmet U. Dilek ◽  
Ali D. Oguz ◽  
Furkan Satis ◽  
Yigit D. Gokdel ◽  
Muammer Ozbek

2021 ◽  
Author(s):  
Milad Rezamand ◽  
Mojtaba Kordestani ◽  
Marcos Orchard ◽  
Rupp Carriveau ◽  
David Ting ◽  
...  

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