Magnetic bridge proximity sensor

Details Magnetic bridge proximity sensor Magnetic bridge proximity sensor

1982-07-15

1984-12-11

Strecker, Gerard R.

Electricity: measuring and testing

Magnetic

Displacement

324228, 324234, G01B 714, G01R 3300

Patent

active

044881134

ABSTRACT:
A proximity sensor for indicating the spatial proximity of a ferrous object omprising a magnetic reluctance bridge formed from a plurality of high and low permeability sections and with a ring core flux gate magnetometer disposed therebetween to form the center reluctance path of the bridge in order to sense flux when the bridge is unbalanced, a dc magnetic field generator disposed along a line of symmetry for the bridge for providing magnetic flux in the bridge, wherein a ferrous object disposed adjacent one of the low permeability sections will unbalance the bridge and cause flux to be detected by the flux gate magnetometer, and further including circuitry for generating a triggering signal when flux is detected by the magnetometer.

REFERENCES:
patent: 3366874 (1968-01-01), K/u/ hne
patent: 3403329 (1968-09-01), Geyger
patent: 3491289 (1970-01-01), Petrini
patent: 3575616 (1971-04-01), Jordan
patent: 3662257 (1972-05-01), Fujiwara
patent: 4013945 (1977-03-01), Grosso
patent: 4066962 (1978-01-01), Jaffe
patent: 4205266 (1980-05-01), Lichtenberg
patent: 4271763 (1981-06-01), Berger

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