Structural Monitoring and Maintenance

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Pulse-Pre Pump Brillouin Optical Time Domain Analysis-based method monitoring structural multi-direction strain

  • Su, Huaizhi (State Key Laboratory of Hydrology-Water Resources and Hydraulic Engineering, Hohai University) ;
  • Yang, Meng (College of Water Conservancy and Hydropower Engineering, Hohai University) ;
  • Wen, Zhiping (Department of Computer Engineering, Nanjing Institute of Technology)
  • Received : 2016.01.13
  • Accepted : 2016.03.28
  • Published : 2016.06.25
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Abstract

The Pulse-Pre Pump Brillouin Optical Time Domain Analysis (PPP-BOTDA) technique is introduced to implement the multi-direction strain measurement. The monitoring principle is stated. The layout scheme of optical fibers is proposed. The temperature compensation formula and its realizing method are given. The experiments, under tensile load, combined bending and tensile load, are implemented to validate the feasibility of the proposed method. It is shown that the PPP-BOTDA technique can be used to discriminate the multi-direction strains with high spatial resolution and precision.

Keywords

Acknowledgement

Supported by : National Natural Science Foundation of China, Jiangsu Natural Science Foundation

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