Sensor detecting movement of a control element moved by an actuator
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United States of America Patent
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May 30, 2006
Issued Date -
N/A
app pub date -
Feb 28, 2005
filing date -
Aug 30, 2002
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A sensor for detecting movement of a control element moved by an electromagnetic actuator comprises a fixed coil arrangement having at least one coil connected to a current supply and to a signal detection device. A housing circumferentially encloses the fixed coil arrangement. The housing comprises a magnetically conductive material with poor electrical conductivity. An axially movable rod-shaped sensor part of a magnetizable material is connected to the control element. A short circuit element comprised of an electrically conductive material with low ohmic resistance is disposed on the rod-shaped element and is delimited in a longitudinal direction of the rod-shaped element by two outer edge regions. The short circuit element is dimensioned in the movement direction of the rod-shaped element so that only one of the outer edge regions of the short circuit element is always positioned inside the fixed coil arrangement during the back and forth movement in a stroke region of the fixed coil arrangement.
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