Patent ID: 7505242
Filing Date: 2009-03-17
Classification: G01D,G01P

Abstract:
1. A method for applying a magnetic mark to a rotatable article having an axis of rotation and to be positioned for determining angles of rotation, rotational speeds or rotational properties, wherein, in a region of the article that is made of a magnetizable material and is suitable for determining the angle or rotation, one single magnetic dipole, two poles of which are arranged symmetrically to a symmetry axis which coincides with the axis of rotation of the article, is generated by a magnetic field as the magnetic mark, wherein two mutually offset magnetic field sensors are placed adjacent the front face of the rotatable article for generating analog signals in response to the magnetic dipole magnetized in the rotatable article, and an angle of rotation of the rotatable article is determined from the analog signals by using a signal receiving and processing device connected to said magnetic field sensors.