Pitch angle measuring system and method for wind turbines
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United States of America Patent
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Feb 20, 2018
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N/A
app pub date -
Dec 10, 2014
filing date -
Jan 21, 2014
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Abstract
The present invention relates to a wind turbine and a measuring system for determining the pitch angle of at least one blade relative to a hub of a wind turbine. The measurement comprises a first angular-velocity sensor (130) measuring a first angular velocity (φ) around a first sensor axis (e1), the first angular-velocity sensor (130) fixedly attached to the at least one blade (100) with a first predetermined orientation selected to produce a first projection of the main rotational axis (32) onto the first sensor axis (e1), a second angular-velocity sensor (140) measuring a second angular velocity (β) around a second sensor axis (e2), the second angular-velocity sensor (140) fixedly attached to the at least one blade (100) with a second predetermined orientation selected to produce a second projection of the main rotational axis (32) onto the second sensor axis (e2), the first sensor axis (e1) and the second sensor axis (e2) being linearly independent, and a first computational unit (160) computing a computed pitch angle (θ1c) based on of the first angular velocity (φ) and the second angular velocity (β).
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