Displacement sensing device with two magnetoresistance element s

Details Displacement sensing device with two magnetoresistance element s Displacement sensing device with two magnetoresistance element s

1985-07-15

1988-03-15

Eisenzopf, Reinhard J.

Electricity: measuring and testing

Magnetic

Displacement

324252, 338 32R, G01N 714, G01R 3302, H01L 4308

Patent

active

047315806

ABSTRACT:
A displacement sensing device includes a sensor of magnetoresistance elements located opposite to a magnetic scale, and is adapted to measure a relative amount of movement between the magnetic scale and the sensor through the use of a variation in a resistive value of the magnetoresistance elements due to the effect of a magnetic pattern on the magnetic scale. The sensor includes magnetoresistance element sections comprised of a first pair of magnetoresistance elements and a second pair of magnetoresistance elements of a pitch different from that of the first pair of magnetoresistance elements. The magnetoresistance element sections are selectively used in accordance with the pitch of the magnetic pattern on the magnetic scale.

REFERENCES:
patent: 3643039 (1972-02-01), Barcomb et al.
patent: 4429276 (1984-11-01), Narimetsu et al.
patent: 4594548 (1986-06-01), Tahahashi et al.

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