Solid-state micro proximity sensor
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United States of America Patent
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Apr 30, 1996
Grant Date -
N/A
app pub date -
Jul 26, 1994
filing date -
Jul 26, 1994
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A solid-state fringe effect capacitive proximity sensor is described which lends itself to use for surface mounting and other space constrained applications. The sensor comprises an insulating substrate having a plurality of sensing electrodes formed thereon and without any screen elements therebetween. The electrodes are adapted to measure the proximity distance of a target object (conductive or non-conductive) by means of the fringe capacitance effect created between the electrodes. Capacitance measurement processing circuitry is electrically connected to the plurality of sensory electrodes.
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