| 摘要 |
To provide a rotation angle detecting device capable of achieving a detection of the angle of rotation at a high speed and with high accuracy and a bearing assembly utilizing such rotation angle detecting device, the rotation angle detecting device includes a magnetic generator ( 4 ) arranged on a rotatable member ( 1 ) and a plurality of linear magnetic sensor arrays ( 5 A to 5 D) arranged on a stationary member ( 2 ), so that a zero-crossing-position in a distribution of magnetic field can be detected from respective outputs of the magnetic sensor arrays ( 5 A to 5 D) and the rotation angle of the magnetic generator ( 4 ) can be detected from the detected zero-crossing-position. While based on the previous zero-crossing-position, the subsequent scanning range of the magnetic sensor arrays ( 5 A to 5 D) is set, the zero-crossing-position is detected within this limited scanning range.
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