Bar code is a standard 1D code as a series of varying width vertical lines (called bars) and spaces. Bars and spaces together are named “elements”. There are different combinations of the bars and spaces which represents different characters. When a barcode scanner is passed over the barcode, the light source from the scanner is absorbed by the dark bars and not reflected, but it is reflected by the light spaces. A photocell detector in the scanner receives the reflected light and convert the light into an electrical signal .As the wand is passed over the barcode(in the above illustration), the scanner creates a low electrical signal from the spaces(reflected light). There are three basic types of bar code readers: fixed, portable batch, and portable RF. Fixed readers remain attached to their cost computer and terminal and transmit one data item data time as the data is scanned. Portable batch readers are battery operators and store data in to memory for later batch transfer to a cost computer. Some advanced portable readers can operate in non- portable mode too, often eliminating the need for a separate fixed reader. The basic operation of a scanner is to scan a barcode symbol and provide an electrical output that corresponds to the bars and spaces of a barcode. A decoder is usually a separate box which takes the digitised bar space patterns, decodes them tothe correct data, and transmits the data to the computer over wires or wireless, immediately or on a batch basics.
This project suggests a user friendly automated ticketing system which will automatically deduct the students fare according to the distance traveled as well as detect the student’s identification. It makes the transaction and traveling very precise. The system is completely automated so it reduces the human effort. The cards being reusable, they are much more convenient compared to the paper based ticketing system. Any unwanted events can be avoided as the entire person carrying bar-code ID tickets.
Paper suggests building of a bar-code ID system that can identify students in college transport as well as does all accounting purpose related to travelling expenses. The system is completely automated so it reduces the human effort. The cards being reusable, they are much more convenient compared to the paper based ticketing system. Any unwanted events can be avoided as all the person carrying bar-code ID tickets are monitored every time they travel. By this method we can improve system accuracy, reduce the human effort.
Specially designed QR reader able to operate in a sunny environment (bus stations or platforms in the open). QR Reader is also able to read QR Codes printed on thin thermal paper with low print quality. Thanks to the RF transceiver it has the ability of wireless communication with the rest of the BusLogic system . This reader uses algorithms that prevent copying of QR codes, it also uses time limits on the usage of tickets and Black Lists to prevent usage of tickets more than once. The Black lists are downloaded through RF communication.
One of the QR Barcode applications is its integration with access control systems. Combined with with ramps and turnstiles reader forms a system that controls passenger access to bus stations and platforms . In addition to the basic features of reading QR codes the device has the possibility of reading electronic contactless Mifare cards. That way it enables the use of practically all of the currently available types of bus tickets, in paper form or electronic contactless cards . It is enough for passenger to lean the ticket near the reader, and if its ID passes all required testing QR reader activates the automatic turnstile and gives passengers access to the bus station or platform. QR readers can communicate with the rest of the Bus Logic system and each other through the RF link.
