Adaptive proximity sensing

Data processing: measuring – calibrating – or testing – Measurement system in a specific environment – Electrical signal parameter measurement system

Reexamination Certificate

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Details

C324S674000

Reexamination Certificate

active

06937951

ABSTRACT:
Some embodiments provide a sensor element, a shield element capacitively coupled to the sensor element and to ground, a coupling circuit to receive an input signal, and to electrically couple the received input signal to the sensor element and to the shield element, an output circuit to generate an output signal, the output signal based on a capacitance between the sensor element and an object, and a classifier to determine a material based on the output signal, and to transmit a material signal to the output circuit based on the determined material, wherein the output circuit is adjustable based on the material signal.

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patent: 5166679 (1992-11-01), Vranish et al.
patent: 5373245 (1994-12-01), Vranish
patent: 5442347 (1995-08-01), Vranish
patent: 5515001 (1996-05-01), Vranish
patent: 5521515 (1996-05-01), Campbell
patent: 6408051 (2002-06-01), Habraken et al.
patent: 6593755 (2003-07-01), Rosengren
patent: 2003/0076118 (2003-04-01), Adams et al.
patent: 0 518 836 (1992-12-01), None

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