Embedded System Of RFID Card Bases On PJM

The Internet of Things has become a hot spot since 2009. As the forefront of the Internet of Things, RFID(Radio Frequency Identification)has been developing rapidly. Because RFID technology bases on PJM(Phase Jitter Modulation) is an efficient technology of information identification and acquisition, it has many advantages, such as non-contact identification, identify multiple high-speed moving objects at the same time, resistance to harsh environments and strong confidentiality. Therefore, it has a relatively wide range of applications in the identification, warehousing, transportation security and other industries. With the development of Electronic Science and Technology, embedded system with an embedded processor core has been developing rapidly. PJM-based RFID technology embedded system development, will be the development trend of RFID.At present, in the domestic and foreign markets most RFID systems are achieved base on microcontroller or PC. The function of MCU is very single. MCU is difficult to implement complex multi-tasking functions, while the PC has a not high cost performance. In addition, card reader in the domestic markets now uses general algorithm, so it is difficult to achieve accurate judgments among the multiple cards. For such cases, RFID reader bases on PJM technology and 32-bit ARM9 microprocessor which has a high cost performance are used in this paper, while the powerful embedded Linux operating system which has an open source is introduced, for the study of desktop RFID intelligent terminal system with modular, multi-interface and human-computer interaction functions.This paper covers the following aspects:Analysis and research the theories of PJM and RFID technology, RFID technology applications and system applications at home and abroad, as the basis for establishing the platform of system's hardware and software.Design the system's human-computer interaction module and database module. The human-computer interaction module includes the implementation of driver development and application. The database module includes database query, database modify and application in human-computer interaction. Using embedded QT GUI programming system, integrating application software is provided by each module, to program system applications. According to the actual use of the project establish the actual use of modern storage and logistics platform bases on the application development.Experimental results show that RFID technology embedded desktop system bases on PJM could read and write multiple tags rightly and effectively manage and display data, achieve reliable real-time transmission function of network. The desire purpose of the study is basically achieved.