Automatic vehicle tolling system.

Abstract

Radio frequency Identification (RFID) consists of the tags which can be either active or passive tag. Passive tag, which I employed, do not have own power supply, much cheaper to manufacture and small coil antenna is used. Basically, an RFID system consists of an antenna or coil, a transceiver (with decoder) and a transponder (RF tag) electronically programmed with unique information. RFID reader is an interrogator. It is placed at the toll gate on every single row where vehicles are passed. The reader contains an RF module, which acts as both transmitter and receiver of radio frequency signals. The reader generates the signal to receive the data from tag. The received signals are sent to the computer system which contains Graphical User Interface (GUI) and the database of all users. The ID number from the tag checks with the recorded database and deduces the toll balance. The computer and microcontroller are connected with USB cable. So, the PIC microcontroller is very compatible for system. The microcontroller displays the amount of deposits on LCD and the gate opens. The IR sensors sense the vehicle presence for closing gate automatically. User registration is achieved through the software part of this project. This has a database for storing user information and for handling the various transactions. An administrator is responsible for user registration and assigning RFID tag numbers to the user he registers. Once registered, this information can only be tampered while updating balance otherwise; the privileges are left entirely to the system owner.