Mechanical-electronic position sensor
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United States of America Patent
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Jun 23, 2009
Grant Date -
Dec 1, 2005
app pub date -
Apr 14, 2005
filing date -
Apr 14, 2004
priority date (Note) -
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Abstract
A mechanical-electronic position sensor in which the wiper voltage of a potentiometer actuated by a plunger is measured, processed by a microcontroller, and is available as an analog output signal via an output stage. In the event that watchdog signals fail to appear because of a malfunction of the microcontroller, two monitoring stages deactivate the output stage. The monitoring stages themselves are tested by regularly interrupting the watchdog signals for a short time while the output stage is maintained active.
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