Vibration analysis in simply supported cable using weighted optical fiber sensors

Kent A. Murphy; Tuan A. Tran; Marten J. de Vries; Richard O. Claus; Sami F. Masri

doi:10.1117/12.166860

7 February 1994 Vibration analysis in simply supported cable using weighted optical fiber sensors

Kent A. Murphy, Tuan A. Tran, Marten J. de Vries, Richard O. Claus, Sami F. Masri

Proceedings Volume 2072, Fiber Optic Physical Sensors in Manufacturing and Transportation; (1994) https://doi.org/10.1117/12.166860
Event: Optical Tools for Manufacturing and Advanced Automation, 1993, Boston, MA, United States

Abstract

This paper discusses a first step in the use of weighted optical fiber sensors to selectively determine the mode shape amplitudes of different vibration modes in a simply supported cable. A weighted fiber sensor has a sensitivity function that varies along the length of the fiber. To date, such weighted sensitivity fibers have been fabricated by either writing spatially chirped refractive index gratings in two-mode elliptical-core fiber or by geometrically tapering single mode or two-mode elliptical core fiber. The output signal from the fiber sensor system is proportional to the weighted integral of strain along the length of the fiber, and subsequent analysis indicates that this yields a measure of only one selected mode.

Citation Download Citation

Kent A. Murphy, Tuan A. Tran, Marten J. de Vries, Richard O. Claus, and Sami F. Masri "Vibration analysis in simply supported cable using weighted optical fiber sensors", Proc. SPIE 2072, Fiber Optic Physical Sensors in Manufacturing and Transportation, (7 February 1994); https://doi.org/10.1117/12.166860

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