Angle detection sensor with setting of ratio of magnetic forces

Details Angle detection sensor with setting of ratio of magnetic forces Angle detection sensor with setting of ratio of magnetic forces

1991-06-05

1992-09-15

Strecker, Gerard R.

Electricity: measuring and testing

Magnetic

Displacement

32420712, 32420725, 324252, G01B 730, G01R 3306

Patent

active

051481065

ABSTRACT:
The present invention relates to an angle detection sensor including: a magnetoresistive element in which a bias magnet is laminated on a magnetic pattern resistance layer of a thin film ferromagnetic material, and a permanent magnet fixed to a rotation shaft which rotates about the center of the magnetoresistive element. In particular, when a rotation angle of the permanent magnet is large, a ratio of a first magnetic force of said permanent magnet to a second magnetic force of said bias magnet is set to be smaller than 1, and, when the rotation angle of the permanent magnet is small, the ratio of the first magnetic force of the permanent magnet to the second magnetic force of the bias magnet is set to be larger than 1.

REFERENCES:
patent: 4283679 (1981-08-01), Ito et al.
patent: 5055781 (1991-10-01), Sakakibara et al.

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