Design And Implementation Of UHF RRID Reader Based On ARM

Internet of things is known as the third development trend of the information industry following computer and Internet. Since the beginning of the21st century, the Internet of things technology has got a rapid development. The application associated with this technology has been used in the field of production and living. RFID is the focus point of the research, which is the key technology of the Internet of things. Radio frequency identification technology is a non-contact identification technology. The targets can be identified by receiving a specific frequency signal. Then, the targets can exchange information with the readers.At present, the low-frequency (125k～134.2kHz) and high-frequency (13.56MHz) technology are matured. The ultra-high frequency (915MHz) has been applied and entered a rapid development stage. The microwave technology (2.45GHz) has a small range of the application because of its high technical threshold. Compared with the low-frequency and high-frequency technology, the UHF technology can identify further, faster and safer. At the same time, the technical difficulty is lower than the microwave technology’s. For the above reasons, the UHF technology product becomes the mainstream of the market. The UHF technology consists of three parts:reader, target and the application software. The reader is the most important equipment. Now, the reader almost uses foreign chips, whose price is very high. And then the development of the Radio frequency identification technology is fallen behind in our country.The research content is to design a UHF RFID reader. It uses the LPC2132chip as the control core, and the RF circuits use the general-purpose chips. This reader can be used in areas such as logistics, warehouse management, identification and so on. Firstly, this paper discusses the current situation of RFID technology, which includes the development trends and exiting problems. Determine the technical indicators of the reader based on demands for industrial and domestic. Secondly, introduce RFID technology and composition. Then, analysis UHF band standard protocol ISO/IEC18000-6C, and determine the technical program of the reader. Thirdly, introduce the digital control circuits and RF analog circuits. Software part, introduce anti-collision algorithm, encoding and decoding, CRC error correction and the background application software. Finally, give the test result of the system and the suggestion of improvement by analysis the result.The results of the test proved that the reader could currently operate on the tags which are far from the reader with1.0m, at the same time, the reader can identification10pieces of the tags with0.5m.The reader could put in to use the parts:logistics, store management and identify.