COMPRESSIBLE CAPACITANCE SENSOR FOR DETERMINING THE PRESENCE OF AN OBJECT
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United States of America Patent
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-
Dec 31, 2002
Grant Date -
Jan 9, 2003
app pub date -
Jul 9, 2001
filing date -
Jul 9, 2001
priority date (Note) -
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status (Latency Note)
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Abstract
A compressible variable capacitance sensor for determining the presence, size, position, and type of an object such as a human body part includes two flexible conductor elements separated by a non-conductive compressible element. The capacitance of the capacitance sensor changes as a function of force applied by an object on the capacitance sensor. A controller senses the capacitance of the capacitance sensor and controls a device accordingly. The device may be a movable closed opening such as a window in which the controller controls the window as a function of the monitored capacitance to prevent pinching of the object. The device may also be a seat in which the controller determines the characteristics of the seat occupant based on the monitored capacitance.
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