Capacitive rotation sensor
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United States of America Patent
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Aug 5, 2014
Grant Date -
Oct 28, 2010
app pub date -
Apr 28, 2010
filing date -
Apr 28, 2009
priority date (Note) -
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status (Latency Note)
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Abstract
A capacitive rotation sensor for detecting the position of an object moving relative to a stationary object, comprising a shaft rotatably supported in a housing flange, said shaft being connected integral in rotation therewith to a rotor to which, separated by an air gap, a stator situated opposite thereto is assigned, wherein at least the rotor, the stator and an evaluation circuit are enclosed by an electrically conductive cap, wherein a stator surface is arranged on the underside of a circuit board and the stator surface has assigned thereto, situated opposite thereto and separated by the air gap, a non-rotation-symmetrical rotor disc which, in turn, is fixed on a rotor support, said rotor support being fastened highly precisely on the outer periphery of the shaft so as to be integral in rotation therewith.
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