Non-symmetrical inductive sensors having ferrite coil geometries

Details Non-symmetrical inductive sensors having ferrite coil geometries Non-symmetrical inductive sensors having ferrite coil geometries

1992-09-21

1994-08-09

Snow, Walter E.

Electricity: measuring and testing

Magnetic

Displacement

32420713, 336221, G01B 714, G01R 3300, H01F 1704, G01N 2772

Patent

active

053369971

ABSTRACT:
New core geometries to increase the sensing range of proximity transducers in general, and eddy current killed oscillator mode sensors, in particular. A theoretical analysis yields electromagnetic parameters that facilitate prediction of the sensing capability of any ferrite core geometry. The results of this analysis is applied to a multitude of Finite Element Analysis models to study changes in maximum sensing distance due to ferrite core geometry modifications. This yielded preferred embodiments for shielded and unshielded sensors.

REFERENCES:
patent: 3510858 (1970-05-01), Flanagan
patent: 3952315 (1976-04-01), Cecco

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