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Sensors 2016, 16(7), 1095; doi:10.3390/s16071095

Theoretical and Experimental Study on Wide Range Optical Fiber Turbine Flow Sensor

School of Power and Energy, Northwestern Polytechnical University, Xi’an 710129, China
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Author to whom correspondence should be addressed.
Academic Editors: Manuel Lopez-Amo, Jose Miguel Lopez-Higuera and Jose Luis Santos
Received: 31 May 2016 / Revised: 8 July 2016 / Accepted: 8 July 2016 / Published: 15 July 2016
(This article belongs to the Section Physical Sensors)
View Full-Text   |   Download PDF [3856 KB, uploaded 15 July 2016]   |  

Abstract

In this paper, a novel fiber turbine flow sensor was proposed and demonstrated for liquid measurement with optical fiber, using light intensity modulation to measure the turbine rotational speed for converting to flow rate. The double-circle-coaxial (DCC) fiber probe was introduced in frequency measurement for the first time. Through the divided ratio of two rings light intensity, the interference in light signals acquisition can be eliminated. To predict the characteristics between the output frequency and flow in the nonlinear range, the turbine flow sensor model was built. Via analyzing the characteristics of turbine flow sensor, piecewise linear equations were achieved in expanding the flow measurement range. Furthermore, the experimental verification was tested. The results showed that the flow range ratio of DN20 turbine flow sensor was improved 2.9 times after using piecewise linear in the nonlinear range. Therefore, combining the DCC fiber sensor and piecewise linear method, it can be developed into a strong anti-electromagnetic interference(anti-EMI) and wide range fiber turbine flowmeter. View Full-Text
Keywords: FFT; double-circle-coaxial fiber; turbine flow sensor model; wide range; piecewise linear FFT; double-circle-coaxial fiber; turbine flow sensor model; wide range; piecewise linear
This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).

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MDPI and ACS Style

Du, Y.; Guo, Y. Theoretical and Experimental Study on Wide Range Optical Fiber Turbine Flow Sensor. Sensors 2016, 16, 1095.

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