Damage detection of rotating wind turbine blades using local flexibility method and long-gauge fiber Bragg grating sensors

2017 ◽  
Vol 29 (1) ◽  
pp. 015108 ◽  
Author(s):  
Ting-Yu Hsu ◽  
Shen-Yuan Shiao ◽  
Wen-I Liao
Keyword(s):  
Damage Detection ◽  
Wind Turbine ◽  
Fiber Bragg Grating ◽  
Turbine Blades ◽  
Bragg Grating ◽  
Wind Turbine Blades ◽  
Fiber Bragg Grating Sensors ◽  
Local Flexibility

Radar-based structural health monitoring of wind turbine blades: The case of damage detection

2017 ◽  
Vol 17 (4) ◽  
pp. 815-822 ◽  
Author(s):  
Jochen Moll ◽  
Philip Arnold ◽  
Moritz Mälzer ◽  
Viktor Krozer ◽  
Dimitry Pozdniakov ◽  
...  
Keyword(s):  
Structural Health Monitoring ◽  
Damage Detection ◽  
Wind Turbine ◽  
Health Monitoring ◽  
Turbine Blades ◽  
Heterogeneous Material ◽  
Material System ◽  
Wind Turbine Blades ◽  
Millimetre Wave ◽  
Structural Health

Structural health monitoring of wind turbine blades is challenging due to its large dimensions, as well as the complex and heterogeneous material system. In this article, we will introduce a radically new structural health monitoring approach that uses permanently installed radar sensors in the microwave and millimetre-wave frequency range for remote and in-service inspection of wind turbine blades. The radar sensor is placed at the tower of the wind turbine and irradiates the electromagnetic waves in the direction of the rotating blades. Experimental results for damage detection of complex structures will be presented in a laboratory environment for the case of a 10-mm-thick glass-fibre-reinforced plastic plate, as well as a real blade-tip sample.

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