Rotational angle detecting sensor having a plurality of magnetor

Details Rotational angle detecting sensor having a plurality of magnetor Rotational angle detecting sensor having a plurality of magnetor

1990-05-10

1991-10-08

Snow, Walter E.

Electricity: measuring and testing

Magnetic

Displacement

32420712, 32420725, 338 32R, 307309, H01L 4308, G01R 3306, G01B 730, G01P 344

Patent

active

050557815

ABSTRACT:
The invention is directed to an arrangement for detecting a rotational angle of a rotating shaft by a sensor. The sensor includes a substrate and a detecting element which has a plurality of blocks of magnetoresistance element deposited on a planar surface of the substrate. The sensor also includes a magneto member which has a pair of magnetic poles facing each side end of the substrate respectively and providing a magnetic field covering at least the planar surface of the substrate. The sensor is so arranged that one of the detecting element and the magneto member is mounted on the rotating shaft, and the other is disposed at a certain position relative to the rotating shaft. Accordingly, the blocks of magnetoresistance element are disposed always in a uniform magnetic field, so that the rotational angle is detected accurately.

REFERENCES:
patent: 4392375 (1983-07-01), Eguchi et al.
patent: 4506217 (1985-03-01), Rothley et al.
patent: 4506220 (1985-03-01), Sawada et al.

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