1 April 2016 Fiber optic sensor for flow and viscosity measurement
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A sensitive fluid viscosity and flow measurement device using optical intensity based sensing is presented. The sensing principle makes use of the damping characteristic of a vibrating optical fiber probe with approximate hinge-free end configuration. The viscosity and mass flow are determined by measuring the vibration of a sinusoidally excited tapered optical fiber under different flow conditions. By measuring the frequency response of the fiber probe, viscosity and mass flow can be deduced from the damping coefficient of the response. The concepts and experimental data presented demonstrate and refine the sensing process of the proposed system.
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Wei-Chih Wang, Wei-Chih Wang, Jonathan Leang, Jonathan Leang, "Fiber optic sensor for flow and viscosity measurement", Proc. SPIE 9805, Health Monitoring of Structural and Biological Systems 2016, 98051Y (1 April 2016); doi: 10.1117/12.2219097; https://doi.org/10.1117/12.2219097

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