Monitoring of blade frequencies of a wind turbine
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United States of America Patent
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Oct 16, 2012
Grant Date -
Sep 30, 2010
app pub date -
Sep 24, 2008
filing date -
Oct 9, 2007
priority date (Note) -
In Force
status (Latency Note)
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Abstract
One or more bolt gauges each with a built-in load cell are positioned on a blade bolt or a bearing bolt between a pitch bearing and a tightening means and tensioned by the securing means at the inside or the outside of a hub of a wind turbine. The bolt gauge then outputs a signal descending both from the tension from the bolt/securing means connection and the tension from the blade when the blade is vibrated due to wind forces and the rotation of the blade when the hub of the wind turbine is rotating.
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