title: An Ultrasonic Multi-Beam Concentration Meter with a Neuro-Fuzzy Algorithm for Water Treatment Plants.
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.
authors.affiliation: School of of Electrical Engineering and Computer Science, Chungbuk National University, Cheongju 28644, Korea. Lhh@kwater.or.kr.
authors.forename: Ho-Hyun
authors.initials: HH
authors.lastname: Lee
authors.affiliation: K-Water Research Institute, Korea Water Resources Corporation, Daejeon 34045, Korea. jsbok0502@kwater.or.kr.
authors.forename: Sang-Bok
authors.initials: SB
authors.lastname: Jang
authors.affiliation: K-Water Research Institute, Korea Water Resources Corporation, Daejeon 34045, Korea. gwshin@kwater.or.kr.
authors.forename: Gang-Wook
authors.initials: GW
authors.lastname: Shin
authors.affiliation: K-Water Research Institute, Korea Water Resources Corporation, Daejeon 34045, Korea. sthong@kwater.or.kr.
authors.forename: Sung-Taek
authors.initials: ST
authors.lastname: Hong
authors.affiliation: School of of Electrical Engineering and Computer Science, Chungbuk National University, Cheongju 28644, Korea.
authors.forename: Dae-Jong
authors.initials: DJ
authors.lastname: Lee
authors.affiliation: School of of Electrical Engineering and Computer Science, Chungbuk National University, Cheongju 28644, Korea. mgchun@cbnu.ac.kr.
authors.forename: Myung Geun
authors.initials: MG
authors.lastname: Chun
keywords: neuro-fuzzy model; ultrasonic concentration meter; water treatment plants