Design of a Supervisory Control and Data Acquisition System for Monitoring Temperature and Light Intensity of a Workstation

摘要

In this Project the design of a Supervisor Control and Data Acquisition (SCADA) system to monitor temperature and light intensity and voltage regulation was carried out. The system when implemented had the ability to control the environmental temperature and ambient light intensity of a workstation and transmit the data of these controlled parameters, wirelessly, between the site and base station. The base station was designed with an LCD display that would enable the user to view these parameters and also have input keypads that the user can use to alter the light intensity and temperature wirelessly. The system carries the voltage regulation on a fan and incandescent bulb as loads. To achieve this feat, an embedded system was used which involves the programming of a PIC microcontroller using assembly language. Other discreet components were also utilized such as resistor, capacitor and transistors. The wireless communication system used is radio frequen cy. This is possible because RF transceivers were mounted on the site base station . After the design, construction and testing, the project was able to function satisfactorily, as the SCADA system could alter environmental temperature and ambient light intensity of a site and transmit the information wirelessly to the base station from 10 o C to 100 o C and 1% to 100% light intensity and vice versa in reduction mode.