Planar magnetic harmonic sensor for detecting small quantities o

Details Planar magnetic harmonic sensor for detecting small quantities o Planar magnetic harmonic sensor for detecting small quantities o

1992-03-16

1994-01-04

Snow, Walter E.

Electricity: measuring and testing

Magnetic

With means to create magnetic field to test material

324253, G01N 2772, G01R 3312, G01R 3304

Patent

active

052763960

ABSTRACT:
A device is disclosed for detecting the presence and/or determining the configuration of a magnetic substance. The device includes a magnetic circuit having a magnetic core and an air gap. Coupled to the magnetic circuit are an excitation coil, for periodically driving the magnetic circuit into saturation, and a measurement coil, for measuring the effective appearing permeability of the magnetic circuit in the presence of the magnetic substance.

REFERENCES:
patent: 3643155 (1972-02-01), Riddle et al.
patent: 3833872 (1974-09-01), Marcus et al.
patent: 3848210 (1974-11-01), Felkner
patent: 4864238 (1989-09-01), Seitz
patent: 4967156 (1990-10-01), Seitz
patent: 5014006 (1991-05-01), Seitz

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