Piezoelectric composite beam with automatically adjustable natural frequency
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United States of America Patent
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Mar 1, 2011
Grant Date -
Jun 10, 2010
app pub date -
Feb 18, 2010
filing date -
Nov 23, 2005
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Abstract
An energy harvesting system includes a composite structure that has a first spring, a piezoelectric structure, and a proof mass. The piezoelectric structure and the proof mass are mounted on the first spring. The composite structure has a natural frequency of vibration. The natural frequency of vibration of the composite structure is automatically adjustable.
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