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Sensors 2015, 15(10), 26961-26977; doi:10.3390/s151026961

An Ultrasonic Multi-Beam Concentration Meter with a Neuro-Fuzzy Algorithm for Water Treatment Plants

1
School of of Electrical Engineering and Computer Science, Chungbuk National University, Cheongju 28644, Korea
2
K-Water Research Institute, Korea Water Resources Corporation, Daejeon 34045, Korea
These authors contributed equally to this work.
*
Author to whom correspondence should be addressed.
Academic Editor: Vittorio M. N. Passaro
Received: 27 July 2015 / Revised: 17 October 2015 / Accepted: 19 October 2015 / Published: 23 October 2015
(This article belongs to the Section Physical Sensors)
View Full-Text   |   Download PDF [1621 KB, uploaded 23 October 2015]   |  

Abstract

Ultrasonic concentration meters have widely been used at water purification, sewage treatment and waste water treatment plants to sort and transfer high concentration sludges and to control the amount of chemical dosage. When an unusual substance is contained in the sludge, however, the attenuation of ultrasonic waves could be increased or not be transmitted to the receiver. In this case, the value measured by a concentration meter is higher than the actual density value or vibration. As well, it is difficult to automate the residuals treatment process according to the various problems such as sludge attachment or sensor failure. An ultrasonic multi-beam concentration sensor was considered to solve these problems, but an abnormal concentration value of a specific ultrasonic beam degrades the accuracy of the entire measurement in case of using a conventional arithmetic mean for all measurement values, so this paper proposes a method to improve the accuracy of the sludge concentration determination by choosing reliable sensor values and applying a neuro-fuzzy learning algorithm. The newly developed meter is proven to render useful results from a variety of experiments on a real water treatment plant. View Full-Text
Keywords: ultrasonic concentration meter; neuro-fuzzy model; water treatment plants ultrasonic concentration meter; neuro-fuzzy model; water treatment plants
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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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Lee, H.-H.; Jang, S.-B.; Shin, G.-W.; Hong, S.-T.; Lee, D.-J.; Chun, M.G. An Ultrasonic Multi-Beam Concentration Meter with a Neuro-Fuzzy Algorithm for Water Treatment Plants. Sensors 2015, 15, 26961-26977.

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