| 摘要 |
PROBLEM TO BE SOLVED: To provide an attaching structure of a displacement detecting sensor of a rotator capable of increasing the signal-noise ratio by the sensor itself and capable of stably detecting the displacement without excessively increasing the magnetic permeability of a sensor target. SOLUTION: Four sensor cores 12 of the displacement detecting sensors 11, which detects the displacement from the inductance varying according to the displacement of the rotator 14 in the radial direction, are disposed opposite to the end surface 15 of the rotator 14 at diagonal positions, orthogonally crossing the outer peripheral edge of the end surface of the rotator 14, so that the area of the section of a magnetic circuit varies according to the displacement of the rotator 14 in the radial direction. Accordingly, the quantity of displacement of the rotator 14 in the radial direction can be detected in relation to the area of the section of the magnetic circuit and the sensitivity can be increased by the sensor itself. Further, the signal-noise ratio can be improved and the displacement can be detected stably even when the rotator 14 is rotating at a high speed without excessively increasing the magnetic permeability of the sensor target. COPYRIGHT: (C)2003,JPO
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