发明名称 |
METHOD FOR DETECTING DAMAGE OF WIND TURBINE BLADE AND WIND TURBINE |
摘要 |
A method for detecting damage of a wind turbine blade of a wind turbine rotor having at least one wind turbine blade comprises: a light incident step of allowing light to enter an optical fiber sensor being mounted on each of the wind turbine blade and having a diffraction grating part having a refractive index which is periodically varied in a longitudinal direction of the diffraction grating part; a light detection step of detecting reflected light from the diffraction grating part; an obtaining step of obtaining, from a temporal change of a wavelength of the reflected light received in the light receiving step, a wavelength variation index representing a variation amount of the wavelength; and a damage determination step of determining presence or absence of a damage of the wind turbine blade on the basis of the wavelength variation index calculated in the obtaining step. |
申请公布号 |
US2016245262(A1) |
申请公布日期 |
2016.08.25 |
申请号 |
US201514809916 |
申请日期 |
2015.07.27 |
申请人 |
MITSUBISHI HEAVY INDUSTRIES, LTD. |
发明人 |
IDE Kazunari;TAKITA Katsuhiko;KUROIWA Takao;BABA Mitsuya;NISHINO Hiroshi;KOYANAGI Takuya |
分类号 |
F03D17/00;G01M11/08 |
主分类号 |
F03D17/00 |
代理机构 |
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代理人 |
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主权项 |
1. A method for detecting damage of a wind turbine blade of a wind turbine rotor having at least one wind turbine blade, comprising:
a light incident step of allowing light to enter an optical fiber sensor being mounted on each of the wind turbine blade and having a diffraction grating part having a refractive index which is periodically varied in a longitudinal direction of the diffraction grating part; a light detection step of detecting reflected light from the diffraction grating part; an obtaining step of obtaining, from a temporal change of a wavelength of the reflected light received in the light receiving step, a wavelength variation index representing a variation amount of the wavelength; and a damage determination step of determining presence or absence of a damage of the wind turbine blade on the basis of the wavelength variation index calculated in the obtaining step. |
地址 |
Tokyo JP |