Journal of the Korean Institute of Illuminating and Electrical Installation Engineers (조명전기설비학회논문지)

The Korean Institute of IIIuminating and Electrical Installation Engineers (한국조명전기설비학회)
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FBG sensor system for condition monitoring of wind turbine blades

풍력터빈 블레이드 상태 감시용 광섬유격자 센서시스템

  • 김대길 (전북대학교 전자정보공학부) ;
  • 김현진 (전북대학교 대학원 전자정보공학부) ;
  • 송민호 (전북대학교 전자공학부)
  • Received : 2013.05.21
  • Accepted : 2013.06.25
  • Published : 2013.08.31
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Abstract

We propose a fiber grating sensor system for condition monitoring of large scale wind turbine blades. For the feasibility test of the proposed sensor system, a down-scaled wind turbine has been constructed and experimented. Fiber grating sensors were attached on a blade surface for distributed strain and temperature measurements. An optical rotary joint was used to transmit optical signals between the FBG sensor array and the signal processing unit. Instead of broadband light source, we used a wavelength-swept fiber laser to obtain high output power density. A spectrometer demodulation is used to alleviate the nonlinear wavelength tuning problem of the laser source. With the proposed sensor system we could measure dynamic strain and temperature profiles at multi-positions of rotating wind turbine blades.

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References

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