Patent ID: 6448761
Filing Date: 2002-09-10
Classification: G01D

Abstract:
An angle of rotation sensor, wherein at least one permanent magnet is rotatable with the rotation of a rotatable body about a rotational axis, an angle of rotation of which needs to be measured, wherein at least one Hall probe is arranged outside of the rotational axis, and the voltage of said Hall probe which is fed to an evaluation unit changes as a function of the angle of rotation of a magnetic field of the magnet, characterized in that the magnetic field of the magnet extends between the poles of the magnet through a yoke that surrounds the magnet, and in that the permanent magnet is arranged such that a width of an air gap between an outside edge of the magnet and the yoke varies over the outside edge of the magnet, and the Hall probe detects a magnetic flux that continuously changes in one direction over an angular range of at least 250Â° during rotation of the rotatable body.