AUTOMATIC CONTROL IN VEHICLES

“Automatic control in vehicles” is a unique speed governor for vehicles at specified zones. This system ensures that the car will travel at or below the speed limit specified at designated areas. Transmitters are installed at the entry point of specified zones, primarily on the speed sign boards to reduce project implementation cost. The Transmitter consists of an encoder and a RF transmitter module with 433 MHz carrier frequency and ASK modulation which transmits the speed limit of that area. The Receivers are installed in all vehicles. A Receiver consists of a decoder, RF receiver module and a micro controller „89S51‟ along with sensors viz. Alcohol sensor, collision sensor and theft sensor. Upon the detection of drunken driving or collision the car decelerates to a stop. The Receiver has a GSM module which sends the message to the respected mobile user upon the event of collision, theft and drunk driving. In the microcontroller, the speed of the vehicle is compared to the speed limit of that area and the speed is then accordingly controlled