Current Optics and Photonics

Optical Society of Korea (한국광학회)
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Experimental Study on Leak-induced Vibration in Water Pipelines Using Fiber Bragg Grating Sensors

  • Kim, Dae-Gil (Honam Research Center, Electronics and Telecommunications Research Institute) ;
  • Lee, Aram (Honam Research Center, Electronics and Telecommunications Research Institute) ;
  • Park, Si-Woong (Honam Research Center, Electronics and Telecommunications Research Institute) ;
  • Yeo, Chanil (Honam Research Center, Electronics and Telecommunications Research Institute) ;
  • Bae, Cheolho (Smart Water Research Center, K-water Research Institute) ;
  • Park, Hyoung-Jun (Honam Research Center, Electronics and Telecommunications Research Institute)
  • Received : 2022.01.18
  • Accepted : 2022.03.04
  • Published : 2022.04.25
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Abstract

Leak detection is one of the most important challenges in condition monitoring of water pipelines. Fiber Bragg grating (FBG) sensors offer an attractive technique to detect leak signals. In this paper, leak measurements were conducted on a water distribution pilot plant with a length of 270 m and a diameter of 100 mm. FBG sensors were installed on the pipeline surface and used to detect leak vibration signals. The leak was demonstrated with 1-, 2-, 3-, and 4-mm diameter leak holes in four different pipe types. The frequency response of leak signals was analyzed by fast Fourier transform analysis in real time. In the experiment, the frequency range of leak signals was approximately 340-440 Hz. The frequency shifts of leak signals according to the pipe type and the size of the leak hole were demonstrated at a pressure of 1.8 bar and a flow rate of 25.51 m3/h. Results show that frequency shifts detected by FBG sensors can be used to detect leaks in pipelines.

Keywords

Acknowledgement

This research has been performed as Project No Open Innovation R&D (20-A-T-002) and supported by K-water.

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