| 摘要 |
PROBLEM TO BE SOLVED: To provide a rotation angle sensor suitable for steering power detection or steering angle detection. SOLUTION: This rotation angle sensor is equipped with a magnet 1 formed cylindrically so that a plurality of N-poles and S-poles facing to the outside in the radial direction are aligned alternately in the circumferential direction; two magnetic yokes 2, 3 formed troidally at an interval from the magnet 1 so as to enclose the magnet 1, and arranged on different positions in the axial direction of the magnet 1; an N-pole projection 4 facing to the N-pole of the magnet 1 protrusively from the inner circumference of one magnetic yoke 2 to the inside in the radial direction; an S-pole projection 5 facing to the S-pole of the magnet 1 protrusively from the inner circumference of the other magnetic yoke 3 to the inside in the radial direction; and a detection element 6 arranged in the sandwiched state between the two magnetic yokes 2, 3, for detecting a magnetic flux density between both magnetic yokes 2, 3 changing by relative rotation between both magnetic yokes 2, 3 and the magnet 1. COPYRIGHT: (C)2007,JPO&INPIT |
