Sensor device for detecting an object in a detection area
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United States of America Patent
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Nov 4, 2014
Issued Date -
N/A
app pub date -
Oct 17, 2008
filing date -
Oct 17, 2008
priority date (Note) -
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status (Latency Note)
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Abstract
A sensor device is provided. The sensor device includes a sensor pad for detecting an object in a detection area by measuring the impedance variation of the sensor pad, the sensor device further including a back focus plate disposed behind the sensor pad relative to the detection area and a first surrounding focus plate arranged around the sensor pad. The sensor device includes a signal generator that drives the sensor pad and the focus plates with a first set of signals having a predetermined constant phase, frequency and voltage amplitude. The sensor device further comprises at least a second surrounding focus plate arranged around the first surrounding focus plate, the second surrounding focus plate being driven with a second set of signals that are different from the first set of signals feeding the sensor pad.
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International Classification(s)
- H03K:PULSE TECHNIQUE
- B60R:VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT ....
- G01B:MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIME....
- G01R:MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC V....
- E05F:DEVICES FOR MOVING WINGS INTO OPEN OR CLOSED POSIT....
- G01V:GEOPHYSICS; GRAVITATIONAL MEASUREMENTS; DETECTING ....
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