Electrostatic capacity-type stroke sensor and dielectric materia

Details Electrostatic capacity-type stroke sensor and dielectric materia Electrostatic capacity-type stroke sensor and dielectric materia

1987-11-16

1989-08-29

Eisenzopf, Reinhard J.

Electricity: measuring and testing

Conductor identification or location

Inaccessible

324 61R, 34087037, 731181, G01R 2726, G08C 1910

Patent

active

048620637

ABSTRACT:
An electrostatic capacity-type stroke sensor is designed for measuring relative displacement between a cylindrical member and a rod member. The electrostatic capacity-type stroke sensor includes a conductive cylinder arranged coaxially to the cylindrical member and fixed to one of the cylindrical member and the rod member for movement therewith. An annular member movable with either the cylindrical member or the rod member and made of a dielectric material is provided opposite the conductive cylinder. The conductive cylinder and the dielectrical annular member are coupled for creating electric capacity magnitude which is variable depending upon the relative position thereof. The conductive cylinder and the dielectric annular member are arranged for relative movement according to relative movement of the cylindrical member and the rod member so that the electrostatic capacity is variable depending upon the relative position of the cylindrical member and the rod member.

REFERENCES:
patent: 2978638 (1961-04-01), Wing et al.
patent: 3596592 (1971-08-01), Trissnak et al.
patent: 3928796 (1975-12-01), Kaiser
patent: 4206401 (1980-06-01), Meyer
patent: 4288793 (1981-09-01), Lotscher
patent: 4408253 (1983-10-01), Nishino et al.
patent: 4587850 (1986-05-01), Moser

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