| 摘要 |
Disclosed is a device for accurately detecting the direction and angle of rotation independently of ambient environments. The device is provided with an equally-spaced electrode holding plate 52 having equally-spaced electrodes 56 arranged along the circumference of a first circle, and a fixed phase electrode holding plate having alpha a-phase electrodes and beta b-phase electrodes both arranged along the circumference of a second circle opposite the first circle, wherein when alpha is equal to or greater than 2, two arbitrary ones of the a-phase electrodes are at positions displaced an angle of an integral multiple of 2pi/N apart on the circumference of the second circle in the rotation direction. When beta is equal to or greater than 2, two arbitrary ones of the b-phase electrodes are at positions displaced an angle of an integral multiple of 2pi/N apart on the circumference of the second circle in the rotation direction. The phase electrodes are arranged so that the a-phase electrodes and the b-phase electrodes are not displaced an angle of an integral multiple of pi/N on the circumference of the second circle in the rotation direction.
|
