| 摘要 |
PROBLEM TO BE SOLVED: To provide a bearing with an absolute angle detection rotary sensor capable of being constituted in a compact manner at low cost and detecting an absolute angle in a non-contact manner with high reliability. SOLUTION: This bearing with the absolute angle detection rotary sensor is constituted by attaching the rotary sensor 7 to a rolling bearing 1 having an inner ring 2, an outer ring 3, and a plurality of rolling bodies 4 provided between both rings 2 and 3. The rotary sensor 7 is provided with an annular magnetic encoder 8 attached coaxially to the inner ring 2 being a rotation side bearing ring and a magnetic sensor 9 attached to the outer ring 3 being a fixed side bearing ring to detect magnetism of the magnetic encoder 8 to detect an absolute angle of the rotation side bearing ring 2. For example, thickness of a magnet 8b of the magnetic encoder 8 is continuously changed over one round. Consequently, strength of magnetic field detected by the magnetic sensor 9 is continuously changed over one round of the magnetic encoder 8. COPYRIGHT: (C)2007,JPO&INPIT
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