The Design Of 2.45 GHz RFID Reader Complying With National Standard

Radio Frequency Identification(tionidentificafrequency radio,RFID)technology is a non-contact automatic identification technology.In 2010,China formally included the Internet of Things in its national development strategy.China's RFID industry ushered in a rare opportunity for development.RFID technology has been widely used in logistics management,intelligent traffic management and other fields.In 2013,China announced GB/T28925-2012 "Information Technology Radio Frequency Identification Air Interface Protocol",which effectively promoted the development of RFID technology and industry.Compared with RFID technology in other frequency bands,the2.45 GHz RFID technology has good anti-collision performance,long-distance transmission range,a large number of tag identifications,and can identify moving objects,and has profound application potential in areas such as indoor asset management and vehicle management.At present,each manufacturer often designs the2.45 GHz microwave reader with a unique protocol,but uses the GB/T28925-2012 protocol less frequently.Therefore,based on the in-depth study of wireless transceiver technology,this paper designs a technical solution for RFID readers conforming to the GB/T28925-2012 protocol,and develops a miniaturized,low-cost national standard2.45 GHz RFID reader.The thesis firstly researches and analyzes the current development of RFID technology,and proposes a design scheme of a national standard 2.45 GHz microwave RFID reader.Secondly,the national standard 2.45 GHz microwave RFID reader/writer adopts the universal design method of the reader and the corresponding microwave RFID technology.The parameters of the physical layer,data link layer,and protocol layer of the GB/T28925-2012 protocol are studied.The technical performance of some commercial products in the market and the needs of practical applications have led to the formulation of design indicators and overall plans for the national standard microwave readers.Then,according to the system and the performance of the circuit,a modular circuit design was performed,and the reader-writer used a single-antenna antenna structure.The baseband signal processing and control circuit of the reader is realized by an ARM+FPGA structure of Xilinx's development board.The software adopts the embedded method,uses FPGA to design the baseband signal processing andcontrol program that accords with GB/T28925-2012 agreement,and develops the application interface program.After the circuit,software debugging and performance optimization,a reader prototype was developed.Finally,a reader performance test platform was set up to perform reader performance testing.The national standard 2.45 GHz RFID reader designed in this paper is14.5*7*0.3cm in size,which is similar to a 5.15-inch smart phone,and realizes the miniaturization of the reader.Can be applied to small indoor asset management,smart parking and other fields.The corresponding 2.45 GHz RFID system can be built by using the active 2.45 GHz electronic tag and the upper computer control program that fits the demand.Based on the implementation of the GB/T28925-2012 protocol,WIFI,3G,and other communication modules can be added to implement multiple communication methods,which are conducive to adapting to complex and varied RFID application environments?...