Patent ID: 6448763
Filing Date: 2002-09-10
Classification: G01D

Abstract:
A position sensor system for determining the position of a moveable object, the system comprising:a magnet coupled to the object, generating a magnetic field; a first magnetic field transducer which detects the generated magnetic field and outputs a first sinusoidal signal representative of the magnetic field direction; a second magnetic field transducer which detects the generated magnetic field and outputs a second sinusoidal signal representative of the magnetic field direction, wherein the distance between the first and second magnetic field transducer and the magnet changes when the object is moved; a signal processor unit coupled to the first and second magnetic field transducers, the signal processor unit outputting a signal which is a function of the sinusoidal signals representative of the position of the object relative to the first and second transducers; and wherein the magnet is magnetized such that the change of the angle of the generated magnetic field detected by the first and second magnetic field transducers is linear to the position of the magnet.