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Jacket Effect of Distributed Sensing Fiber under Constant Tension


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Jacket Effect of Distributed Sensing Fiber under Constant Tension
DING Yong12SHI Bin3DING Jian-guo1LIANG Bi-yun1
1.School of Sciences,NUST,Nanjing 210094,China;2.Nanjing Hydraulic Research Institute,Nanjing 210029,China;3.Center for Engineering Monitoring with Opto-electronic Sensing,Nanjing University,Nanjing 210093,China
sensing fibers fiber tight-jackets jacket effect Brillouin optical time domain reflectometer constant tension relaxation
To study the effect of fiber jackets on strains,the strains of tight-jacket fibers and normal fibers are measured under multi-turn long time(48 h)constant tension using Brillouin optical time domain reflectometer(BOTDR).The experimental results show the fiber jacket has some effect on the fiber strain.In the process of the first-round constant tension,the strain of tight-jacket fiber is decreased by 100 με;after being relaxed for 4 days,in the process of the second-round constant tension,the strain of tight-jacket fiber is decreased by 50 με;after being relaxed for 8 days;in the process of the third-round constant tension,the strain of tight-jacket fiber is not changed.The strain of normal fiber is not changed under the multi-turn constant tensions.


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Last Update: 2012-11-02