Patent ID: 6249234
Filing Date: 2001-06-19
Classification: G01D,G06F

Abstract:
A position sensor comprising:first and second sets of windings each set extending in a different direction and each comprising first and second windings;a magnetic field generator which is adapted to be magnetically coupled to each of said windings, said field generator and said windings being movable relative to each other such that the magnetic coupling between the field generator and each of said windings varies as a function of said movement, for generating a plurality of output signals respectively dependent upon the magnetic coupling between the field generator and the respective said windings;said magnetic field generator and said windings being adapted so that in use:(a) the variation in magnetic coupling between said field generator and each of said windings has first and second components which are respectively dependent upon the relative position and the relative tilt of the field generator and the winding in the corresponding direction; and(b) the first component of said variation in magnetic coupling between said field generator and the first winding of each set has a different spatial frequency from the corresponding variation between the field generator and the second winding in the set;whereby said relative position and tilt in said different directions may be detected from said plurality of output signals from which the relative rotation of the field generator and the windings may be determined.