Magnetic field detector for detecting earth's magnetic field

Details Magnetic field detector for detecting earth's magnetic field Magnetic field detector for detecting earth's magnetic field

1991-01-04

1993-02-16

Snow, Walter E.

Electricity: measuring and testing

Magnetic

Magnetometers

324260, G01R 3300, G01R 3304

Patent

active

051874377

ABSTRACT:
A magnetic field detecting device, particularly for detecting the earth's magnetic field, includes one or more amorphous or microcrystalline magnetic fibres having two bistable magnetization states and surrounded by one single measuring coil (103). The measuring coil is supplied with a periodically changing control signal (101a) which is superposed with a detected signal (103a) contingent on the sensed magnetic field. The detected signal is caused to control a flip-flop (122) which influences the working direction of an integrator (101), the output signal of which forms a performance signal in addition to forming said control signal. The performance signal (101c, 106a) is processed in a microprocessor (107), to which a control signal (122b) is also delivered from the flip-flop, and is able to restart the circuit when a control signal fails to appear.

REFERENCES:
patent: 3568052 (1971-03-01), Anderson
patent: 3936949 (1976-02-01), Devaud
patent: 4591788 (1986-05-01), Mohri et al.

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