US 6,981,423 B1 | ||
System and method for sensing torque on a rotating shaft | ||
Frederick M. Discenzo, Brecksville, Ohio (US) | ||
Assigned to Rockwell Automation Technologies, Inc., Mayfield Heights, Ohio (US) | ||
Filed on Sep. 30, 2003, as Appl. No. 10/674,967. | ||
Application 10/674967 is a continuation in part of application No. 10/409894, filed on Apr. 09, 2003. | ||
Claims priority of provisional application 60/371104, filed on Apr. 09, 2002. | ||
Int. Cl. G01L 1/24 (2006.01) |
U.S. Cl. 73—800 | 27 Claims |
1. An optical characteristic inspection system comprising:
a layer of photo-elastic material that overlays a portion of a rotating structure;
a signal emitting component that delivers a signal to the photo-elastic material, the signal is directed photo-elastic material
along an axis of the structure;
an analysis component that receives light exiting the photo-elastic material, the exiting signal associated with structural
degradation characteristics; and
a control component that provides a pulse of known amplitude to the system.
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