| 摘要 |
PROBLEM TO BE SOLVED: To provide a non-contact rotational angle detecting sensor which is superior in linearity. SOLUTION: The non-contact rotational angle detecting sensor has a ring-shaped permanent magnet 20 which rotates integrally with a detection object of a rotational angle and whose magnetic poles change along the circumferential direction, a ring-shaped inside magnetic flux collecting yoke 40 for surrounding the outer peripheral surface of the permanent magnet 20 at a constant gap, a ring-shaped outside magnetic flux collecting yoke 50 for surrounding the outer peripheral surface of inside yoke 40 at a fixed gap, and a Hall IC 60 arranged in a gap 43 formed in the inside yoke 40. The sensor is so structured that the axial height of the inside yoke 40 is changed along its circumferential direction. COPYRIGHT: (C)2009,JPO&INPIT
|
