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Proceedings Paper

Fiber optic sensors for rotating components
Author(s): Christopher S. Baldwin; James S. Sirkis; Thomas Rossmanith
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Paper Abstract

Rotating components, such as beams and blades, experience vibrations while rotating. Many blades, such as the ones used in rotorcraft, machine tools and turbines, experience fatigue failure due to the vibration of the rotating blade; therefore, optical sensors could indicate when the strain increases to unsafe limits. This paper describes two techniques of implementing optical fibers on rotating components. The first technique to be examined uses an optical slip ring to transmit the light signal from the rotating frame to a stationary photodetector demodulation circuit, that will determine the strain in the beam. The second technique uses an integrated chip mounted on the rotating frame, that records the signal. The signal recorded from the sensor during rotation is downloaded once the rotation has stopped. Preliminary results from the optical slip ring are presented. These results show difficulties in the alignment of such a device.

Paper Details

Date Published: 20 April 1995
PDF: 9 pages
Proc. SPIE 2444, Smart Structures and Materials 1995: Smart Sensing, Processing, and Instrumentation, (20 April 1995); doi: 10.1117/12.207715
Show Author Affiliations
Christopher S. Baldwin, Univ. of Maryland/College Park (United States)
James S. Sirkis, Univ. of Maryland/College Park (United States)
Thomas Rossmanith, Univ. of Maryland/College Park (United States)

Published in SPIE Proceedings Vol. 2444:
Smart Structures and Materials 1995: Smart Sensing, Processing, and Instrumentation
William B. Spillman, Editor(s)

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