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A fiber optic sensor for noncontact measurement of shaft speed, torque, and powerA fiber optic sensor which enables noncontact measurement of the speed, torque and power of a rotating shaft was fabricated and tested. The sensor provides a direct measurement of shaft rotational speed and shaft angular twist, from which torque and power can be determined. Angles of twist between 0.005 and 10 degrees were measured. Sensor resolution is limited by the sampling rate of the analog to digital converter, while accuracy is dependent on the spot size of the focused beam on the shaft. Increasing the sampling rate improves measurement resolution, and decreasing the focused spot size increases accuracy. Digital processing allows for enhancement of an electronically or optically degraded signal.
Document ID
19900012044
Acquisition Source
Legacy CDMS
Document Type
Conference Paper
Authors
Madzsar, George C. (NASA Lewis Research Center Cleveland, OH, United States)
Date Acquired
September 6, 2013
Publication Date
January 1, 1990
Subject Category
Instrumentation And Photography
Report/Patent Number
NASA-TM-102481
E-5271
NAS 1.15:102481
Meeting Information
Meeting: International Instrumentation Symposium
Location: Denver, CO
Country: United States
Start Date: May 6, 1990
End Date: May 10, 1990
Sponsors: Instrument Society of America
Accession Number
90N21360
Funding Number(s)
PROJECT: RTOP 590-21-41
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.

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