bbk 000000
UDC 628.144
Bol'shev K. N., Ivanov Vasilii Alekseevich, Stepanov A. A., Varfolomeev G. R.
Temperature and pressure monitoring system of the water distribution networks of Yakutsk
Summary
The information on the design of the system of monitoring temperature and pressure in the water distribution networks of Yakutsk is presented. In operating the municipal water supply under low temperature conditions continuous water temperature and pressure monitoring in the network is needed to prevent from pipeline freezing and overheating of the pumped water. To this end automated systems of temperature and pressure monitoring in the networks have been developed. To provide for the data remote transfer for the system control Circuit Switched Data (CSD) technology for GSM mobile networks is used. With the help of this technology two GSM modems can establish a communication channel for import of data. For the operation of this system at a remote measuring point a cellular communication signal of the selected operator at the facilities together with continuous power supply shall be available. AIR-10N pressure sensors and TSPU-205-N temperature sensors were used as transmitters with 4–20 mA standardized signal; CPU – computer-process interface modules manufactured by Elemer SPE OJSC were used for subsequent transformation of signal and interface. Exchange of data between the computer and analogue input modules is ensured by MODBUS protocol version. To provide for the system control an information computerized system including a data base with Microsoft SQL Server 2008 Express, a service of terminal polling with the help of Windows service application, and an operator interface was developed. At present the system is operating steadily in the mode of systematic polling. The designed system can provide for collecting data from 200–300 measuring points.
Key words
water supply , monitoring , pressure , pipeline , centralization of control , temperature
