| 摘要 |
PURPOSE:To obtain a rotary signal of a high rate, having a high S/N ratio by providing an electric conductor electrode opposed in a plane state to a rotating side structural body and a fixed side structural body, and obaining an electrostatic capacity variation of >= two phases by a rotation of the rotating side structural body. CONSTITUTION:Pattern-like electrostatic electrodes 21, 22 of a rotor (a) side are at the same phase position, and the insides are connected continuously by ring patterns 24, 25, respectively. Pattern-like electrostatic electrodes 26-29 at a stator side are connected continuously to torus patterns 50-53 in the outside and the inside, respectively. The electrodes 26, 27 and the electrodes 28, 29 are shifted electrically in its phase by pi/2 in the circumferential direction. The first signal is generated by an electrostatic capacity formed by the electrodes 26, 27 and the electrode 21, and the second signal is generated by an electrostatic capacity formed by the electrodes 28, 29 and the electrode 22. |
