Non-contacting magnetic position sensor, and method of determining the position between two relatively-movable members
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United States of America Patent
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Issued Date -
Aug 23, 2007
app pub date -
Feb 22, 2006
filing date -
Feb 22, 2006
priority date (Note) -
Abandoned
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Abstract
A non-contacting position sensor (20) for sensing and determining the position between two relatively-movable members (23, 31) includes a pair of flux-conductive converging polepieces (21, 22) mounted on one of the members (23); a magnetic sensor (29) mounted on the one member and positioned proximate the convergent polepiece ends, this magnetic sensor being adapted to produce an output signal as a function of the magnetic flux density therein; and a magnet (30) mounted on the other member (31) for movement toward and away from the magnetic sensor, this magnet being positioned between the polepieces to define the first air gap between the magnet and one polepiece and a second air gap between the magnet and the other polepiece, the reluctances (RV1, RV2) of the first and second air gaps (32, 33, respectively) varying as a function of the position of the magnet relative to the magnetic sensor such that the sensor output signal will be a function of the position of the magnet from the magnetic sensor.
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