풍력발전기 블레이드 처짐 측정을 위한 다중화 센서 탐촉자 설계 제작 (Fabrication of a Multiplexing Sensor Probe for Measuring the Blade Deflection of a Wind Power Generator)

서지정보

· 발행기관 : 한국생산제조학회
· 수록지 정보 : 한국생산제조학회지 / 23권 / 2호 / 178 ~ 185페이지
· 저자명 : 김지대, 이동주

초록

This paper describes a fabrication multiplexing sensor probe that employs a fiberBragg grating(FBG) based on multiple measurements to determine the bladedeflection of a wind power generator the reliability analysis of this probe is alsopresented. To diminish the temperature sensitivity of the FBG sensor, we formmultiple CFRPs onto the upper and lower layers of the FBG and package it withan epoxy resin. As a result, the depth of the CFRP is 1mm, and the temperaturesensitivity is 2.39pm/℃. We construct a sensor network utilizing the fabricatedsensor with a blade beam model. As the number of pendulums is increased on thefore-end of the beam, the strain value is measured. The strain variation iscalculated from the measurement of the load on the blade beam model bymonitoring the strain of the FBG sensor. When the linear equation is applied, thestrain error is 0.4% and when the finite difference method is used, the tipdeflection error is 3.3%. The displacement error derived from the strain value ofthe FBG sensor is 4.39%. The calculated result between the measured value of thedead-end of the beam and the strain is less than 2.46% tip distortion error.
Therefore, our proposed multiplexing sensor probe is a low-cost andhigh-reliability solution for a commercial wind power generator.

영어초록

This paper describes a fabrication multiplexing sensor probe that employs a fiberBragg grating(FBG) based on multiple measurements to determine the bladedeflection of a wind power generator the reliability analysis of this probe is alsopresented. To diminish the temperature sensitivity of the FBG sensor, we formmultiple CFRPs onto the upper and lower layers of the FBG and package it withan epoxy resin. As a result, the depth of the CFRP is 1mm, and the temperaturesensitivity is 2.39pm/℃. We construct a sensor network utilizing the fabricatedsensor with a blade beam model. As the number of pendulums is increased on thefore-end of the beam, the strain value is measured. The strain variation iscalculated from the measurement of the load on the blade beam model bymonitoring the strain of the FBG sensor. When the linear equation is applied, thestrain error is 0.4% and when the finite difference method is used, the tipdeflection error is 3.3%. The displacement error derived from the strain value ofthe FBG sensor is 4.39%. The calculated result between the measured value of thedead-end of the beam and the strain is less than 2.46% tip distortion error.
Therefore, our proposed multiplexing sensor probe is a low-cost andhigh-reliability solution for a commercial wind power generator.

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