Patent ID: 6753681
Filing Date: 2004-06-22
Classification: G01D

Abstract:
An angle sensor comprising: a tubular yoke fixed to a rotational member; magnets fixed to an inner side surface of the tubular yoke and rotating around a rotational central axis of the rotational member; and a magnetoelectric conversion element disposed in magnetic field generated by the magnet and outputting an electric signal corresponding to the magnetic field; wherein the magnets include four pieces of magnets, two pieces of the magnets â€œforming a magnetic pole of a first polarity on one side of the tubular yoke and two other pieces of the magnets forming a magnetic pole of opposite polarity on the other side of the tubular yokeâ€  and wherein the magnets forming the magnetic pole of one side and the magnets forming the magnetic pole of the other side are separated from each other and are fixed to the inner side surface of the tubular yoke.