Design of Traffic Flow based Street Light Control System

Monitoring of street lights and controlling is of utmost importance in developing country like India to reduce the power consumption. This paper presents a street light control system which combines various technologies: a timer, Liquid Crystal Display (LCD), a statistics of traffic flow magnitude, a photosensitive detector (LDR), infrared photoelectric control, Light Emitting Diodes (LED), power transistors, dual relays and wireless communication (ZigBee). This system contains light sensor to observe the day and night detection to turn lamps on, merely during night time. It also includes infrared detectors to turn light on automatically when vehicles, pedestrians pass by, later turn off after a certain predefined delay for even more energy conserving. This system also includes fault detection and feedback circuit to indicate the present state of the control system. The intact information regarding these various aspects is transferred to nearby control terminal (base station) by using ZigBee communication to visualize the state of the system by creation of Graphical User Interface (GUI) there. It allows substantial energy savings with increased performance and maintainability.