Piezoelectric laminate motion sensing apparatus and method
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United States of America Patent
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Feb 14, 2006
Grant Date -
Jan 2, 2003
app pub date -
Jul 18, 2001
filing date -
Jul 28, 2000
priority date (Note) -
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status (Latency Note)
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Abstract
A motion sensing system utilizing piezoelectric laminates with predetermined surface electrode patterns disposed thereon utilizes a frequency selector to pass motion waves of predetermined frequencies and an electrical circuit for processing the electrical signals for transmission to an activating device for appropriate activation. In particular, the frequency selector is a low frequency bandpass filter for free-fall acceleration wave frequencies. By directing appropriate action, the present invention increases the applicability of the device upon which it is mounted (e.g., for military or other hostile environment use), decreases the possibility of damage, and lengthens its useful life.
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