Linear capacitance displacement transducer

Details Linear capacitance displacement transducer Linear capacitance displacement transducer

1989-01-04

1990-10-02

Eisenzopf, Reinhard J.

Electricity: measuring and testing

Impedance, admittance or other quantities representative of...

Lumped type parameters

324678, 324690, 34087037, G01R 2726, G08C 1910

Patent

active

049610554

ABSTRACT:
A linear capacitance displacement transducer for measuring absolute displacement is formed from a coaxial variable capacitor and a precision capacitance measuring electronic circuit. The plates of the coaxial capacitor are attached to the members of an assembly whose displacement relative to one another is to be determined. Linear displacement of the members causes a linear displacement between the capacitor plates which is reflected in a linear capacitance change. A capacitor controlled oscillator utilizes the coaxial variable capacitor at its input. The capacitor controlled oscillator whose period of oscillation is been determined by the capacitance and locked in phase with changes of capacitance is utilized as a precision measure of capacitance. The period of the square wave output of the oscillator is a linear function of the capacitance of the variable capacitor at any time. The transducer may be adapted to determine the absolute position of a piston rod in a hydraulic cylinder.

REFERENCES:
patent: 3026474 (1962-03-01), Pihl
patent: 4288793 (1981-09-01), Lotscher
patent: 4350040 (1982-09-01), Fasching et al.
patent: 4404481 (1983-09-01), Ide et al.
patent: 4429272 (1984-01-01), Bungay
patent: 4466289 (1984-08-01), Lam
patent: 4587850 (1986-05-01), Moser
patent: 4607238 (1986-08-01), Kohsiek
patent: 4788488 (1988-11-01), Kramer et al.
patent: 4788489 (1988-11-01), Kobayashi et al.

Affiliated with

Also associated with

Rating

Linear capacitance displacement transducer does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Linear capacitance displacement transducer, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Linear capacitance displacement transducer will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-294591