The Research And Application Of RFID System Based On NRF24E1

The RFID technology is a kind of wireless identification technology. It not only covers the Electromagnetic theory and Microwave technology, but also includes LSI, Communication technology, EMC, data protection& Cryptography, Manufacture technics and so on. The prominent characteristics of RFID make it have dual significance of theory and actuality on research and development.The design and manufacture of RFID antenna is one of key techniques in RFID system. Through deeply researching the theory of microstrip antenna and array antenna,meanwhile,after an analysis of feasibility for using to reader,the thesis designs a kind of microstrip dual array antenna and its matching network.Then, using HFSS9.0 to simulate and optimize.Eventually,the sample antenna is made and the test results indicate that the antenna works well.NRF24E1 wireless data transmission module is used as the hardware carrier in this thesis.Through programming two kinds of hardware driver based on the communicaton protocol developed here independently, the wireless data transmission modules work as reader and transponder respectively. Meanwhile, the microstrip dual array antenna is fixed in reader, in order to expand the communication distance between readers and transponder. The LCD module for displaying the important information is also been considered in this RFID system. In addition, a general interface transformer of RS232/485 is designed to support the long distance data transmission and control.Furthermore, the software for intelligent charging system of parking is also developed using database technology, which can manage kinds of manipulations such as receiving, storing, controlling information and so forth.The software designed here has friendly man-machine interfaces for synchronously displaying and updating relevant informations.A pratical design process of a RFID system has been proposed in this thesis. It can be applied to not only intelligent charging system of parking lot but also many other situations such as highway charging, warehouse checking and so on. It is no doubt that this research has a good utility value.