Sensor for strip of conductive material

Details Sensor for strip of conductive material Sensor for strip of conductive material

1993-07-22

1995-02-28

Snow, Walter E.

Electricity: measuring and testing

Impedance, admittance or other quantities representative of...

Lumped type parameters

G01R 2726

Patent

active

053940954

ABSTRACT:
A sensor device for a noncontact sensor for the control of moving strips of conductive material. One or more detector electrodes are capacitively coupled to a counterelement. An oscillator governs this coupling and forms two coupling fields at the two edges of the strip. Lateral movement of the strip interacts with the two coupling fields. The at least one detector electrode is embraced by at least one shielding electrode, the shielding electrode being coupled through an amplifier of unity gain factor in such a manner to the at least one detector electrode that the potential of the at least one shielding electrode follows the potential of the detector electrode.

REFERENCES:
patent: 3312892 (1967-04-01), Parnes
patent: 3341774 (1967-09-01), Dyben
patent: 3812424 (1974-05-01), Abbe
patent: 4322678 (1982-03-01), Capots et al.
patent: 4719409 (1988-01-01), Dorman
patent: 4837500 (1989-06-01), Abbringh
patent: 4922181 (1990-05-01), Pullan
patent: 5134379 (1992-07-01), Maher et al.

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