Magnetic rotation detector for detecting characteristic of a rot

Details Magnetic rotation detector for detecting characteristic of a rot Magnetic rotation detector for detecting characteristic of a rot

1996-12-06

2000-11-14

Snow, Walter E.

Electricity: measuring and testing

Magnetic

Displacement

32420725, G01P 3487, G01D 5245

Patent

active

061474878

ABSTRACT:
A magnetic rotation detector is composed of a rotary element alternately magnetized with north and south magnetic poles in a circumferential direction and arranged to rotatable about a rotational axis, a magnetoresistance element arranged to be opposed to the magnetized portion of the rotary element, the magnetoresistance element including a linearly patterned superlattice composed of alternately layered magnetic and nonmagnetic metals, and a signal processing circuit placed in a remote position apart from the magnetoresistance element and connected to a pair of terminals of the superlattice to produce a series of pulse signals based on variation of the resistance value of the superlattice caused by change of intensity of a field of the rotary element.

REFERENCES:
patent: 4274053 (1981-06-01), Ito et al.
patent: 4694688 (1987-09-01), Takahashi et al.
patent: 4851771 (1989-07-01), Ikeda et al.
patent: 4949039 (1990-08-01), Grunberg
patent: 5315282 (1994-05-01), Shinjo et al.
patent: 5475304 (1995-12-01), Prinz
patent: 5617071 (1997-04-01), Daughton

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