| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To implement a structure for use in measurement of a physical quantity of at least one of a displacement of a rotating member and a load acting on the rotating member, which is capable of accurately measuring a rotational speed of the rotating member on the basis of an output signal of a sensor made to face a surface to be detected of an encoder 1a. <P>SOLUTION: Among a pair of through holes 11a and 11b constituting each of characteristic change combination parts 3a and 3a provided on the surface to be detected of an encoder 1a, one through hole 11a is formed in a breadthwise direction of the surface to be detected, and the other through hole 11b is formed in a direction inclined to the breadthwise direction. A rotational speed of the rotating member is measured on the basis of a period L (L<SB POS="POST">1</SB>, L<SB POS="POST">2</SB>) between pulses generated on the basis of the through holes 11a and 11a. <P>COPYRIGHT: (C)2012,JPO&INPIT</p> |
