Patent ID: 6576890
Filing Date: 2003-06-10
Classification: G01D

Abstract:
A non-contacting angular position sensor, comprising:a rotatable member, the angular position of which, is to be measured; said member being rotatable through a predetermined angle, a pair of flux concentrators arranged to form an arc having an enclosed angle generally equal to said predetermined angle of rotation; a rotatable, radially magnetized arc segment magnet coupled to said rotatable member, said arc segment magnet having an enclosed angle generally in the range of 20-40% greater than the arc of said flux concentrators; said magnet and said pair of flux concentrators being radially spaced, one within the other, with a gap between them; and a Hall sensor fixed between said flux concentrators, wherein an output of said Hall sensor linearly relates to the position of the member as the member rotates through said predetermined angle.