Patent ID: 6462537
Filing Date: 2002-10-08
Classification: G01B,G01D

Abstract:
A rotation angle sensor, comprising:a magnet, said magnet having an axis about which said magnet is rotatable; a first yoke arranged around said magnet, said first yoke including a first pole piece portion radially opposed to said magnet and a first overhang portion extending radially inwardly from said first pole piece portion across said axis of said magnet; a second yoke arranged around said magnet, said second yoke cooperating with said magnet and said first yoke to form a magnetic circuit, said second yoke including a second pole piece portion radially opposed to said magnet and diametrically opposed to said first pole piece portion and a second overhang portion extending radially inwardly from said second pole piece portion across said axis of said magnet, said second overhang portion being opposed to said first overhang portion in a direction of said axis of said magnet; and a signal generating device operative, in response to rotation of said magnet relative to said first and second yokes, to detect a density of magnetic flux generated by said magnet and passing through said first and second yokes and generate an output signal indicative of the density of magnetic flux detected, said signal generating device being disposed between said first and second overhang portions.