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Optical Measurement Of Propfan DeflectionsOptoelectronic system measures deflections of rotating propfan. In addition to 0.5-mW HeNe lasers, system includes Schottky-barrier photodetectors, neutral-density filters, signal amplifiers, output-signal-recording device, and digitizer. Laser beam passes through plane of rotation of propfan blades. Beam is one of three that measure displacements at different blade sections. Additional laser beam at bottom generates shaft-rotation timing signal.
Document ID
19940000099
Acquisition Source
Legacy CDMS
Document Type
Other - NASA Tech Brief
Authors
Ramsey, John K. (NASA Lewis Research Center, Cleveland, OH.)
Meyn, Erwin H. (NASA Lewis Research Center, Cleveland, OH.)
Mehmed, Oral (NASA Lewis Research Center, Cleveland, OH.)
Kurkov, Anatole P. (NASA Lewis Research Center, Cleveland, OH.)
Date Acquired
August 16, 2013
Publication Date
February 1, 1994
Publication Information
Publication: Laser Tech. Brief.
Volume: 2
Issue: 1
Subject Category
Electronic Systems
Report/Patent Number
LEW-15678
Accession Number
94B10099
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.

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