Encoder unit using magnetoresistance effect element

Details Encoder unit using magnetoresistance effect element Encoder unit using magnetoresistance effect element

1986-08-05

1988-11-15

Eisenzopf, Reinhard J.

Electricity: measuring and testing

Magnetic

Displacement

324262, G01B 714

Patent

active

047852410

ABSTRACT:
An encoder unit comprising an object to be detected having a track having a first region with a magnetization pattern at a predetermined pitch and a second region having no periodic magnetization pattern, and a detector having a magnetoresistance effect element arranged in the direction which intersects the direction of the magnetic flux of the magnetization pattern and in opposed relationship with the object to be detected. The encoder unit is simple in construction yet capable of detecting the position of the object to be detected with a higher degree of accuracy than conventional encoders.

REFERENCES:
patent: 3993946 (1976-11-01), Makino
patent: 4274053 (1981-06-01), Ito et al.
patent: 4319188 (1982-03-01), Ito et al.
patent: 4403187 (1983-09-01), Takahashi et al.
patent: 4429276 (1984-01-01), Narimatsu et al.
patent: 4506220 (1985-03-01), Sawada et al.
patent: 4551676 (1985-11-01), Amemiya et al.
patent: 4589038 (1986-05-01), Radtke
patent: 4599561 (1986-07-01), Takahashi et al.

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