Contact sensitive device
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United States of America Patent
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Mar 22, 2005
Grant Date -
Jul 8, 2004
app pub date -
Dec 5, 2003
filing date -
Dec 6, 2002
priority date (Note) -
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Abstract
A contact sensitive device includes a member capable of supporting bending waves and a plurality of sensors mounted on the member for measuring bending wave vibration in the member. The sensors measure the bending wave signals and by calculating a phase angle for each measured bending wave signal and a phase difference between the phase angles of least two pairs of sensors so that at least two phase differences are calculated, the location of the contact can be determined.
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