Using distributed Brillouin sensor to predict pipe deformation with carbon coated fibers
The temperature and strain measurement of carbon/polyimide coated fibers based on Brillouin gain spectrum is presented for the first time. The strain dependence of the Brillouin frequency shift for the carbon/polyimide-coated fiber maintained linear relation with the elongation up to 4％ and 4.26％ for two kinds of carbon/polyimide coated fibers comparing to 1～1.5 ％ for single mode fiber-28 (SMF-28). We then use this carbon-polyimide fiber successfully measured longitudinal strains for the first time in two full-scale steel pipe specimens subjected to loading combinations of internal pressure, axial tensile force and bending moments undergoing local buckling under controlled laboratory conditions. Standard communication fibers and carbon/polymide-coated fibers were used for two pipes. A novel signal processing scheme based on the broadening factor of the Brillouin spectrum width was successfully adopted in detecting localized pipe deformation.
strain sensor temperature sensor deformation distributed monitoring health diagnosis
Xiaoyi Bao Chunshu Zhang Wenhai Li F.Ozkan Magdi Mohareb
Fiber Optic Group, Department of Physics, the University of Ottawa, Canada Department of Civil Engineering, the University of Ottawa, Canada
国际会议
南京
英文
9-11
2007-10-18（万方平台首次上网日期，不代表论文的发表时间）