390 - A new online rotor condition monitoring method using FBG sensors and no telemetry system
Hwang Y., Lee I., Lee J., Lee S.
Abstract
Online stress monitoring at various points on a rotor has always been a challenging issue especially under critical conditions. Strain-gages combined with slip rings have been dominantly used to directly measure stress of a rotor and FBG (Fiber Bragg Grating) sensors combined with a telemetry system have been recently used especially in wind turbine blade monitoring. FBG sensor generally has much superior characteristics compared to strain-gagesĄ¯, however, it needs a telemetry system to be used for rotor monitoring to send measured data to the ground station. In this paper, a new FBG sensor system which does not require a telemetry system is explained. This revolutionary system makes use of lightĄ¯s unique characteristic - light travels through space. A single optical fiber with many sensing points is installed on the rotor and unlike other systems all necessary equipments are installed at ground thereby giving tremendous advantages over slip ring or telemetry system. The suggested systemĄ¯s superior performance is demonstrated with experiments.
Citation
Hwang Y.; Lee I.; Lee J.; Lee S.: A new online rotor condition monitoring method using FBG sensors and no telemetry system, CD-ROM Proceedings of the Thirtheenth International Congress on Sound and Vibration (ICSV13), July 2-6, 2006, Vienna, Austria, Eds.: Eberhardsteiner, J.; Mang, H.A.; Waubke, H., Publisher: Vienna University of Technology, Austria, ISBN: 3-9501554-5-7
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