Patent ID: 6020736
Filing Date: 2000-02-01
Classification: G01D,G01P

Abstract:
A position sensor comprising:an object to be detected made of a magnetic material fixed to a body of rotation and disposed within a predetermined range of an angle of rotation on a plane perpendicular to an axis of the body of rotation;a bias magnet magnetized in an axial direction thereof for generating a bias magnetic field to the body of rotation in a direction perpendicular to the axis of the body of rotation, said bias magnet being disposed radially outwardly of the object; anda magnetic resistance element disposed in the bias magnetic field generated directly from said bias magnet, at a position deviated from the position of disposing the object to be detected in an axial direction of the body of rotation and detecting a direction of a magnetic vector in the axial direction of the body of rotation, said magnetic resistance element being positioned on a plane which extends from one magnetic pole side of said bias magnet in the axial direction of said bias magnet, whereby said magnetic resistance element is subjected to a greatest possible magnetic field.