POWER GENERATING ELEMENT
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United States of America Patent
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Issued Date -
Jun 4, 2015
app pub date -
Jul 25, 2013
filing date -
Aug 1, 2012
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Abstract
A power generating element includes a composite rod and a coil. The composite rod is obtained by joining a magnetostrictive rod through which lines of magnetic force pass axially and a reinforcing rod of a non-magnetic material for causing appropriate stress in the magnetostrictive rod and arranged in parallel with the magnetostrictive rod. The coil is provided so that the lines of magnetic force pass axially inside the coil and a voltage is generated based on variation of density of the lines of magnetic force. The power generating element is configured so that the density varies when the other end portion of the composite rod is displaced perpendicular to an axial direction of the composite rod with respect to one end portion of the composite rod to expand or contract the magnetostrictive rod.
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