Displacement current sensor

Details Displacement current sensor Displacement current sensor

1978-08-10

1980-09-23

Moffitt, James W.

Electrical transmission or interconnection systems

Electrets

G01B 700, G11C 1302

Patent

active

042245400

ABSTRACT:
A displacement current sensor for generating electrical signals representative of relative motion between a conductor and an electric field source.
The sensor includes means for generating an electric field and electrically conductive means positioned for interaction with the electric field, the field generating means and the electrically conductive means being relatively movable so that variations in the field encountered by the electrically conductive means induces a displacement current, as opposed to a conduction current, in the electrically conductive means.
The field generating means preferably is fabricated from an electret formed in any one of a wide variety of geometrical shapes, such as planar, cylindrical or special geometrical configurations; the electrically conductive means may comprise one or more plates, wires, rods, or other special shapes.

REFERENCES:
patent: 2581063 (1952-01-01), Alexander
patent: 3890511 (1975-06-01), Haugsjaa et al.
patent: 3942029 (1976-03-01), Kawakami et al.
Journal of Applied Physics-vol. 43, No. 2, Feb. 1972, pp. 408-411.

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