Research On Positioning Algorithm And It’s Application In Prison Security Based On RFID

In the early nineteen forties, the improvement and application of radar made the birth of RFID (Radio Frequency Identification), and the theory basis of RFID was established at the end of1940s. RFID has reached maturity after several decades. At the same time, the rapid development of the Internet to the application of RFID technology has broad application prospects. Equipment and products based on RFID technology can be seen everywhere. The frequency of RFID products covers widely, the products which the frequency range from125KHz to2.45GHz above can be used in different occasions. Meanwhile, RFID products have many advantages, such as high efficiency, instantaneity, anti-crash, multiple choices, safety and reliability etc. It can be seen in the library books and students cards of primary school and junior middle school. RFID equipments are also used in access control system of companies. The RFID products and equipments are very popular.The positioning algorithm of RFID is a hot topic. The paper researched and compared several common positioning algorithms deeply. The positioning algorithm used in the system is raised combined with the read/write device performance index. And then this algorithm combines the actual prison security function design and Realization of the final application system. The thesis mainly includes:First of all, the communication theory of RFID is explained in detail, and the application of RFID in positioning is researched deeply. Several popular positioning algorithms has been analyzed and studied. The positioning algorithms of the system are raised which combined with basic property of RFID read/write equipment.Secondly, aiming at the particularity of the prison system, the regional positioning system based on the RFID indoor and outdoor combined with the practical demand were developed. It is realized by hardware link and software programming. The card numbers that collected by system are computed by the elected positioning algorithm and then preserved in database. The management personnel could view them through the preparation of a computer display interface, and then the management personnel would do simulation exercise to the system of indoor and outdoor positioning system. Finally, the prison positioning and security system which combined with the prison environment was designed. The system included staff basic information management, information management, tracking and positioning route playback, database management, alarm processing, the RFID equipment management and other functions. Each module and the principle of the system were described in detail.