DEVICE FOR DETECTING THE ANGULAR POSITION OF AN OBJECT

摘要

A device for detecting the angular position of an object uses an MR-sensor (2) arranged in a magnetic field. One component (H &cir& NOt or H &cir& NOt g) and one axis of reference (3) of the MR-sensor (2) are rotatable in an axis of rotation (5) with respect to each other around an angle of rotation (THETA or PHI) which is unambiguously correlated with the angular position of the object, whereas the electric resistance of the MR-sensor (2) unambiguously depends from said angle of rotation (THETA or PHI). According to the invention, the MR-sensor (2) is designed with a giant MR-layered system having at least one measurement layer (12) with a magnetisation (M &cir& NOt M) which may be rotated by the magnetic field (H &cir& NOt or H &cir& NOt g) and at least one biasing layer (16) with a constant magnetisation (M &cir& NOt B) and whose resistance depends from the angle (ALPHA) between both said magnetisations (M &cir& NOt M and M &cir& NOt B).