Patent ID: 6411081
Filing Date: 2002-06-25
Classification: G01D

Abstract:
A linear position sensor for determining the position of a moveable object having two magnets generating a magnetic field, the two magnets spaced apart in a perpendicular plane to the plane of traverse of the object, the sensor comprising:a first magnetic field transducer which detects the generated magnetic field and outputs a first sinusoidal signal representative of the angle of the magnetic field direction relative to the first transducer; a second magnetic field transducer which detects the generated magnetic field and outputs a second sinusoidal signal representative of the angle of the magnetic field direction relative to the second transducer; 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 magnets are placed in an angular relation to each other in order to optimize the linear relation between the sinusoidal signals and the actual position of the object.