Dr. Dengke Chen Profile

Dr. Dengke Chen

at Chinese Peoples Liberation Army

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Proceedings Article | 18 March 2021 Paper

Non-intrusive fiber DFB flowmeter based on turbulent vibration

Le Li, Dengke Chen, Chen Wang, Ying Shang, Jiasheng Ni, Chang Wang

Proceedings Volume 11780, 1178024 (2021) https://doi.org/10.1117/12.2591811

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We propose a new non-intrusive flowmeter using the distributed feedback (DFB) fiber laser as a flowmeter to monitor the flow rate in the pipe. The DFB flowmeter is set on the outer wall of the pipe. And the relationship between the wavelength and the phase changes of the DFB flowmeter and the liquid flow rate in the pipeline is derived via turbulent vibration. Under the guidance of this theory, the design and test of the DFB flowmeter is completed. The result shows that this DFB flowmeter can measure the pipe flow from 0.71 m³/h to 2.35 m³/h accurately via frequency analysis in different frequency regions, which demonstrates 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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