Capacitive Position Sensor
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United States of America Patent
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Issued Date -
Sep 25, 2008
app pub date -
May 16, 2005
filing date -
May 14, 2004
priority date (Note) -
Abandoned
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Abstract
A capacitive position sensor has a periodic array of electrodes which form capacitors between pairs of the electrodes. The location of a dielectric inhomogeneity in the vicinity of the sensor is determined by comparison of the relative change in the capacitance of the capacitors. The comparison may be carried out using a capacitive Wheatstone Bridge arrangement. The sensor configuration has the advantage that it is independent of the absolute value of the dielectric constant of the environment in which the sensor is located.
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