Application And Research Of Storage System Based On UHF RFID

With the rise of Internet of Things, RFID has gained a wide application as thecore of it. RFID is a non-contact and automatic identification technology. In contrast tobar code technology, magnetic card technology, optical character recognitiontechnology, it is characterized by large volume, strong anti-interference ability, visualreading and writing, etc, and it is widely used in logistics supply, vehicle identification,automatic charges, etc. Especially UHF RFID technology has promoted thedevelopment of logistics field.According to frequency, RFID technology can be divided into low frequency (LF),high frequency (HF), ultra frequency(UHF) and microwave,etc. The storage systemchooses UHF band, mainly because the distance of UHF reader can reach up to 10meters, the writing and reading speed is quick, and it is safe, reliable, anti-jamming.The working band of UHF reader is from 300 MHZ to 3000 MHZ, ISO/IEC 18000-6series standard defines 860 MHZ-960 MHZ spectrum of air interface parameters. InChina, the UHF RFID frequency is from 840 MHz to 845 MHz and 920 MHz to 925MHz.Based on UHF RFID technology, the storage system mainly consists of severalcomponents: electronic tags, UHF RFID reader, antenna, the application software,SQL database. It takes the reader of IMPINJ company, and the communicationalmethod adopts RS232/RS485 serial port, RJ45, also it provides ApplicationProgramming Interface for the user in the Windows system. Based on API, the mainlywork is to develop the application program with ASP.NET and SQL databasetechnology, to realize the function of reading or writing tag. As the core of system,UHF RFID applys to storage system, collects and records the basic attribute andenvironmental information in real time. It can improve the automation degree ofstorage management and the traceability of materials information. The introduction part prevents the basic concept of RFID and the research status athome and abroad. And then the second chapter describes the structure design of storagesystem. The system consists of two systems: RFID system and WSN system. RFIDsystem collects E-tag EPC, attributes, and additional information; WSN system isresponsible for collecting the environment information , such as temperature , humidityand so on.The core work embodys in 3,4,5 chapters. The third chapter presents the design ofkey technology in storage system, including the design of functional module anddesign of database structure. With ASP.NET technology, it designs five functionalmodules for storage system. With SQL Server technology, it designs the structure ofdatabase table, which saves the EPC code and additional information stored in usermemory(transmitted by RFID system), and environmental information transmitted byWSN system. The fourth chapter introduces the approach to communicate and demoprocess between RFID reader with PC. IMPINJ reader adopts RS232 serial portcommunication with PC. After setting IP address for the reader, we can login it, set theparameters, and read/write tags. Chapter 5 introduces the specific process andprogramming code for storage system management platform. Based on API providedby reader, it realizes data transfer from electronic tags to reader, from reader to thedatabase, and from database to application software.