Method and apparatus for detecting angular phase difference

Details Method and apparatus for detecting angular phase difference Method and apparatus for detecting angular phase difference

2005-03-29

2005-03-29

Goins, Davetta W. (Department: 2632)

Communications: electrical

Condition responsive indicating system

Specific condition

C340S686100, C340S686300, C250S231160, C250S231170, C250S231180, C341S013000, C700S058000, C700S059000

Reexamination Certificate

active

06873264

ABSTRACT:
A rotational phase difference detecting system, a method that is capable of very accurately detecting a rotational phase difference between a plurality of rotating bodies, a machine operating-state monitoring system, and a method employing the rotational phase difference detecting system. The detecting system has a first rotating body with a first mark, a second rotating body with a second mark, a mark sensor for detecting the first mark, a first camera for imaging the second mark when the mark sensor detects the first mark, and a display section for displaying the second mark imaged by the first camera. The rotational phase difference is detected from a position of an image of the second mark displayed on the display section and is thus detected very accurately with a simple construction comprising the mark sensor, the first camera, and the display section.

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