Copyright © IFAC AUTOMATIC SYSTEMS FOR BUILDING THE INFRASTRUCTURE IN DEVELOPING COUNTRIES Bansko, Bulgaria, 2004 TELEMETRIC AND TELECONTROL APPLICATION IN WATER DISTRIBUTION SYSTEMS Mile J. Stankovski 1 , Tatjana Kolemishevska-Gugulovska 1 , Jovan Stefanovski 2 1 Institute of ASE at Faculty of EE , St. Cyril and Methodius University”, MK-1000, Karposh II, bb, Skopje, Republic of Macedonia; E-mail: [milestk,tanjakg]@etf.ukim.edu.mk 2 HMS “Strezevo”, MK-6000, Bitola, Republic of Macedonia, jovanstef@mt.net.mk Abstract –These paper present practical aspects in application of telemetry and telecontrol using new aspect of electronics, signal processing, telecommunications, and of course theory of control systems. In the paper are presented some aspects during the design of telemetry and telecontrol systems. Here is presented also a real system of telemetry and telecontrol in water distribution. Keywords: ҟ telemetry, telecontrol, digital data transfer, radio data modem, water distribution 1. INTRODUCTION Telemetry is defined as the sensing and measuring of information at some remote location and then transmitting that information to a central or host location. There, it can be monitored and used to control a process at the remote site. Thus, telemetry can be think of as a remote measuring and data acquisition commonly related to supervisory and control systems (SCADA) (Vasant, 1999; Mandic, 2002; Rao, 1998; Stankovski at al., 2003; Stephens, 2001). The previous definition of telemetry implies a few key points that must be taken into account when designing a telemetry system (Canning, 1999; Mandic, 2002): 1.Sensor end-points for measuring and collecting the data, 2.Communication system for transmitting the data, 3.Central or host software for system management and data presentation. Telemetric and telecontrol systems have great applications in many fields, especially in water, gas and oil pipelines control, water distribution control, wastewater treatment and in many other fields (Canning, 1999; Rowe, 1988). In this paper we discuses one water distribution system in region Pelagonija, Republic of Macedonia. Second section present discussion about sensor end-points for measuring and collecting the data, third section present communication systems in telemetric and telecontrol, forth section present central or host software for system management and data presentation, fifth section elaborate one practical system for telemetric and telecontrol for water distribution. 2. SENSOR END-POINTS Naturally, selection of the type of sensor is strongly related to the nature of measurement and it will not be discussed in the article. What is more of interest is the way that data are collected and prepared for the transmission. Sensors convert physical phenomena (e.g. temperature, pressure, level, conductivity, position, flow, humidity) to electrical signal (current, voltage, resistance), which represents the measured signal by its intensity or frequency in wide range of values. For the reason of open interconnection among various sensors, devices and systems, it is common to convert that kind of electrical signals to standard electrical signals. Devices that provide such standard interfaces are called transducers or signal conditioners, and the standard electrical signals they provide are 4-20mA, 0-1V, 0-5V, 1-10V. Transducers are also suitable point to perform some IFAC DECOM-TT 2004 Automatic Systems for Building the Infrastructure in Developing Countries October 3 - 5, 2004 Bansko, Bulgaria