Dynamic and non-contact measurement of displacement or of permit

Details Dynamic and non-contact measurement of displacement or of permit Dynamic and non-contact measurement of displacement or of permit

1998-08-24

1999-11-23

Hurbert, Martin A.

Communications: electrical

Continuously variable indicating

With particular transmitter

324661, 324690, G08C 1910

Patent

active

059908076

ABSTRACT:
A method for dynamic and non-contact measurement of the displacement of a conductive substance with respect to a capacitive sensor formed by two parallel conductive plates, superimposed, electrically insulated from one another, and fed by a high frequency signal having a predetermined voltage, the capacitive sensor being connected to a device for detecting a current value. Also disclosed is a method for dynamic and non-contact measurement of the permittivity of a dielectric substance between a conductive part and a capacitive sensor of the above-mentioned type.

REFERENCES:
patent: 2962641 (1960-11-01), Maltby
patent: 4675670 (1987-06-01), Lalonde
patent: 4913071 (1990-04-01), Miller
patent: 4959615 (1990-09-01), Andermo
patent: 4963829 (1990-10-01), Wereb
patent: 5051921 (1991-09-01), Paglione
Van Nostrand's Scientific Encyclopedia, "Capacitance Transducer", p. 510, (1983).

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