Laser torquemeter - A new instrument
Abstract
A noncontact torquemeter is described whose operation relies on the periodicity of the dynamic laser speckle pattern backscattered from a rotating shaft. At 1800 RPM, some 100 time-resolved torque readings per cycle are possible to an accuracy of approximately 1 arcmin of shaft twist. In addition there is inbuilt immunity to shaft speed fluctuations and whole body vibrations.
- Publication:
-
Electronics Letters
- Pub Date:
- January 1991
- DOI:
- 10.1049/el:19910119
- Bibcode:
- 1991ElL....27..186W
- Keywords:
-
- Backscattering;
- Laser Applications;
- Speckle Patterns;
- Torquemeters;
- Phase Locked Systems;
- Structural Vibration;
- Transmissions (Machine Elements);
- Twisting;
- Instrumentation and Photography