| 摘要 |
<P>PROBLEM TO BE SOLVED: To solve the following problem: conventionally, the shape of a mobile body has been necessary to be changed for speed detection without using an optical encoder or the like, in detecting a rotational speed. <P>SOLUTION: By using a phenomenon that amplitude fluctuations in frequencies corresponding to the number of a plurality of protrusions on a vibrator occur at an S-phase signal detected from an electrode for vibration detection of a vibration type actuator, rotational speed information is detected. <P>COPYRIGHT: (C)2012,JPO&INPIT |
