Capacitive sensor device and installations comprising a...

Details Capacitive sensor device and installations comprising a... Capacitive sensor device and installations comprising a...

2006-03-21

2006-03-21

Nguyen, Vincent Q. (Department: 2858)

Electricity: measuring and testing

Impedance, admittance or other quantities representative of...

Lumped type parameters

C324S686000

Reexamination Certificate

active

07015704

ABSTRACT:
A water supply for sanitary devices has a sensor, is activatable without contact, has a first capacitor with first and second conductive layers and a dielectric layer positioned there-between. A second capacitor having a first and second electrically conductive layers and a dielectric layer there-between. An AC voltage generator is electrically connected to the second layer of the first capacitor for coupling an AC voltage. The supply has a sensor amplifier for amplifying an output signal and the first layer is shared by the capacitors and has a shared absorption area. Upon approach or contact of an object or a liquid, an additional capacitor is formed whose effective capacitance experiences a detectable change that is tapped at the second layer.

REFERENCES:
patent: 5594353 (1997-01-01), Hemphill
patent: 6559658 (2003-05-01), Brandt

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