Structural monitoring ofa bending beam using Brillouin distributed  optical fiber sensors

Sang-Hoon Kim; Jung-Ju Lee; Il-BumKwon

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Structural monitoring ofa bending beam using Brillouin distributed optical fiber sensors

机译：Structural monitoring ofa bending beam using Brillouin distributed optical fiber sensors

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摘要

Due to the large measurement range, distributedoptical fiber sensors are very effective in the monitoring oflarge structures. Brillouin distributed optical fiber sensors,which measure strain by using Brillouin frequency shift, showsome measurement error for non-uniformly distributed strain because of their spatial resolution characteristics. Theyrequire compensation of measured values and positions in theend-parts of the measurement range because measured values arenot distributed over all the positions of the spatialresolution range. In this paper, we present the strain measurementcharacteristics of Brillouin distributed optical fiber sensors and the compensation method in the end-parts of the measurementrange. A deflection measurement method for a beamsubjected to a bending load using Brillouin distributedoptical fiber sensors is also presented. This is verified by athree-point bending experiment employing an 8m aluminum beam. Theexperimental results showed that the measured value agrees withthe one expected by Brillouin measurement theory.

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《smart materials and structures》 |2002年第3期|396-403|共页
作者
Sang-Hoon Kim; Jung-Ju Lee; Il-BumKwon;
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作者单位

Department of Mechanical Engineering, ME3033,Korea Advanced Institute of Science and Technology, 373-1Kusong-dong, Yusong-ku, Taejon 305-701, Korea;

Korea Research Institute of Standards and Science, PO Box 102, Yusong-ku, Taejon 305-600, Korea;

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Structural monitoring ofa bending beam using Brillouin distributed optical fiber sensors

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