Method and apparatus to determine the proximity of a permanent m

Details Method and apparatus to determine the proximity of a permanent m Method and apparatus to determine the proximity of a permanent m

1978-11-13

1980-05-27

Rolinec, Rudolph V.

Electricity: measuring and testing

Magnetic

Magnetometers

324221, 324207, 33178F, G01R 3302

Patent

active

042052661

ABSTRACT:
An electromagnetic sensing system is disclosed for sensing the linear distance between two elements and generating a signal related to the distance. The sensing system utilizes a magnetized initiator as one element, and a magnetic fluxgate as the second element. The magnetic fluxgate creates a flux "window" by locating a biased toroidal saturating coil inside a sensing coil, both of which are located inside a non-magnetic sleeve having an opening or "window" to magnetic flux, with the window being focused on the initiator magnet.

REFERENCES:
patent: 2281960 (1942-05-01), Vacquier
patent: 2640271 (1953-06-01), Boucher
patent: 2736967 (1956-03-01), Doll
patent: 3218547 (1965-11-01), Ling
patent: 3246219 (1966-04-01), Devol et al.
patent: 3249915 (1966-05-01), Koerner
patent: 3319161 (1967-05-01), Beynon
patent: 3453531 (1969-07-01), Warren

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