Main > HPArticle > Non-intrusive flow measurement based on DFB-FL
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  • Manuscript Accepted: Nov. 28, 2019

    Online Published: Nov. 29, 2019

Chinese Optics Letters, 2020, Vol. 18, Issue 2, pp.

Non-intrusive flow measurement based on DFB-FL

Shang Ying, Wang Chen, Ni Jiasheng, Zhao Wenan, Li Chang, Cao Bing, Huang Sheng, Wang Chang, Peng Gangding

Author Affiliations

  • Laser Institute, Qilu University of Technology (Shandong Academy of Sciences)
  • Laser Institute
  • Shandong Key Laboratory of Optical Fiber Sensing Technologies, Laser Institute, Qilu University of Technology(Shandong Academy of Sciences)
  • Laser Institute of Shandong Academy of Sciences
  • Laser Institute, Qilu University of Technology (Shandong Academy of Sciences)
  • Laser Institute, Qilu University of Technology (Shandong Academy of Sciences)
  • Laser Institute, Qilu University of Technology (Shandong Academy of Sciences)
  • Laser Institute, Qilu University of Technology (Shandong Academy of Sciences)
  • The University of New South Wales

Abstract

We propose a new non-intrusive flow measurement method using the DFB-FL as a sensor to monitor flow in the pipe. The relationship between the wavelength of DFB-FL and the liquid flow rate in the pipeline is derived. Under the guidance of this theory, the design and test of the flow sensor is completed. The response curve is relatively flat in the frequency range of 10Hz to 500Hz, and the response of the flow sensor has high linearity. The flow from 0.6 m3/h to 25.5 m3/h is accurately measured under the energy analysis method in different frequency intervals. Minimum flow rate of 0.046 m/s is achieved. The experimental results demonstrate the feasibility of the new non-intrusive flow measurement method based on DFB-FL and has achieved accurate measurement of small flow rates.

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