RFID is the abbreviation of English Radio Frequency Identification, Radio Frequency Identification technology. It's a - kind of radio frequency identification is the abbreviation of English radio frequency identification, namely, radio frequency identification (rfid) technology. It is a non - contact automatic identification technology. RFID system -- a by electronic labels, readers and information processing software system three parts group of non-contact automatic identification technology. Rfid systems - generally composed of electronic tags, readers and information processing software systems into.Electronic tags in the store has the basic information of the goods, when the label into the reader rf magnetic field, labels are produced. The basic information of the product is stored in the electronic tag, which is excited when it enters the reader's RF magnetic field Induced current, will the information stored in the tag to the reader, the reader through the decoding system identification tag, and knowledge can be induced current, launch will be stored in the tag information to the reader, the reader through the decoding system identification tag, and knowledge can be other information is further transmitted to the information processing system for analysis and processing.According to the energy supply mode of RFID tags, tags can be divided into active tags and passive tags; According to the RFID radio frequency used in work, the RFID system can be divided into tags can be divided into active and passive tags; According to the radio frequency used at work, RFID systems can be divided into low frequency, high frequency, uHF and microwave systems. The low frequency, high frequency, ultra high frequency and microwave system。

RFID has many advantages over bar codes, which are our most common today. Such as information storage capacity big, non-contact recognition, knowledge compared with we are currently the most common type of bar code, rfid has many advantages. Such as large information storage, non-contact identification, long identification distance, fast and convenient, information can be updated, labels can be reused, labels can adapt to different working environments, etc. Don't long distance, fast, convenient, information is updated, labels can be reused, labels can adapt to different working environment, etc.