Romanian Journal of Information Science and Technology (ROMJIST)

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ROMJIST is a publication of Romanian Academy,
Section for Information Science and Technology

Editor – in – Chief:
Academician Dan Dascalu

Secretariate (office):
Adriana Neagu
Adress for correspondence: romjist@nano-link.net (after 1st of January, 2019)

Editing of the printed version: Mihaela Marian (Publishing House of the Romanian Academy, Bucharest)

Technical editor
of the on-line version:
Lucian Milea (University POLITEHNICA of Bucharest)

Sponsors:
• National Institute for R & D
in Microtechnologies
(IMT Bucharest), www.imt.ro
• Association for Generic
and Industrial Technologies (ASTEGI), www.astegi.ro

ROMJIST Volume 22, No. 3-4, 2019, pp. 202-214, Paper no. 628/2019
 

S. Kavi PRIYA, G. SHENBAGALAKSHMI, T. REVATHI
Architecture of Smart Sensors for Real Time Drinking Water Quality and Contamination Detection in Water Distributed Mains

ABSTRACT: Drinking Water Distribution Mains carry portable water from many water resources like reservoirs, river, and water tanks for industrial, commercial and residential consumer’s purposes through complex buried pipe networks. Predicting the consequences of a water contamination event is important in the field of water systems security and in drinking water distribution mains.The proposed work represents the development of novel low cost fuzzy based water quality monitoring system using wireless sensor networks which is capable of analyzing the physiochemical parameters of water quality such as pH, temperature, conductivity, oxidation reduction potential and turbidity. Hence, based on the selected parameters a sensing unit is developed along with several micro systems for analog signal conditioning, data aggregation, sensor data analysis and logging, and remote representation of data to the consumers. Finally, algorithms for fusing the real time data and decision making using fuzzy logic at local level are developed to predict the water contamination risk. The water contamination level and the drinking water quality in the distribution pipeline are categorized as acceptable/reject/desirable. While the contamination is detected, the sensing unit embedded with ZigBee sends signals to close the solenoid valve inside the pipeline to prevent the flow of contaminated water and it intimates the consumers about drinking water quality through messaging service or mobile app. Experimental results indicate that this low cost real time water quality monitoring system acts as an ideal early warning system with best detection accuracy. The derived solution can also be applied to different IoT (Internet of Things) scenario such as smart cities, the city transport system etc.

KEYWORDS: Water quality monitoring, wireless sensor network, fuzzy logic, water distribution mains, network lifetime, ZigBee protocol, In Pipe, Contamination detection

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