| 摘要 |
<p>The invention relates to a method and apparatus for detecting the angular phase difference between a plurality of rotating objects, and to a method and apparatus for monitoring the operation of a machine. An apparatus for detecting the angular phase difference comprises a first mark (12) on a first rotating object (13), a second mark (10) on a second rotating object (11), a mark sensor (4) for detecting the first mark, a first camera (2) for imaging the second mark in response to the first mark detected by the mark sensor, and a display (7) for displaying the second mark imaged by the first camera. The angular phase difference between the first and second solid rotating objects is detected accurately from the position of the image of the second mark on the display.</p> |
