JIU JIANG UNIVERSITY
中英文文献翻译
题 目 RFID射频识别技术概述 院 系 信息科学与技术学院 专 业 计算机科学与技术 姓 名 武晓杰 班级学号 A121238
二Ｏ一五年十二月
RFID basic principle
What is the RFID?
RFID is the abbreviation for Radio Frequency Identification, called electronics label .
What is the RFID technology?
RFID recognition is a non-contact automatic identification technology, rf signal through its automatic target recognition and access to relevant data, identify work without manual intervention, it can work in various environments. RFID technology can identify high-speed moving objects and can identify multiple tags, the operation is fast and convenient.
Accenture laboratory's chief scientist sir alex ferguson feels RFID is a breakthrough technology: \class objects; second, the use of rf, can read data through external materials, and bar code must rely on laser to read information; third, can also read on to multiple objects, and bar code can only read one by one. In addition, store of information is also very big.\What is the basic component of RFID?
The most basic RFID system consists of three parts:
·Tag:Tag consists of components and chips, each Tag has only electronic coding, adhere to the object for identifiering target;
·Reader:read (sometimes also can write) label information equipment,it can be designed for portable or fixed;
·Antenna: Transmit radio frequency signals between in the label and reader. The basic principle of RFID technology is what?
The basic principle of RFID technology is not complex: Label into the field, Receive radio frequency signals from reader collision, with all the energy stored in a chip of the product information （ passive tag, there is no source label or labels ）, Or actively to
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send a frequency signals（ active tag and to label or labels ） ； to read information and understanding of the decoder after the central information systems to carry out the relevant data processing.
What makes retailers so highly RFID?
Sanford Bernstein cristiano, according to analysts estimate the retailing company, by adopting the RFID, wal-mart can save $8.35 billion each year, mostly because of the purchase of artificial view does not need to save the cost of labor code. Although some analysts think $8 billion in the digital too optimistic, but undoubtedly, RFID help solve the problem: the two biggest retail commodities and loss (broken by theft and supply chain was unsettled and loss of products),now a wal-mart, stealing a loss is almost 20 billion dollars, if a legitimate business turnover can achieve this number, can in American 1,000 enterprise's list of top first 694. Research organizations estimate, This rfid technology can help to reduce the level of 25% reduction and stock. The typical application of RFID technology is what?
Logistics and supply management Manufacturing and assembly Airline baggage handling Mail/express parcel
A document tracking/library management Animal identity tags Movement
Access control/electronic tickets Automatic charge. Road
RFID automatic recognition term explanation
· micro wave: wavelength of 0.1-100 centimeters or frequency in 1-100GHZ electromagnetic wave.
·radiation frequency: usually microwave.
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·electronic tags: stored data object code identification tag, also called rf CARDS.
·passive tags: without power and internal by receiving microwave energy work. ·active tags: by internal batteries work labels.
·microwave antenna: used for launching and receive a signal. ·read device: Used to read the labels in electronic data.
·programming device: for electronic data written to the label or labels for the stored data.
·beam bracketing: refers to the antenna beam range of microwave irradiation range launch power.
·tag capacity: The label of programming can be written in the number of digits or logical.
A - Biz -utomatic identification technology application case frame ASN - senior freight notice
BIS - commercial information system DA - shipment notification
EAN --European articles coding EPCTM - electronic products ONS - objects name resolution services PML - entity markup language UCC - unity coding committee UML - unified modeling language
System composition and working principle The most basic RFID system consists of three parts:
·Tag:Tag consists of components and chips, each Tag has only electronic coding, adhere to the object for identifiering target;
·Reader:read (sometimes also can write) label information equipment,it can
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be designed for portable or fixed;
·Antenna: Transmit radio frequency signals between in the label and reader. Some systems have readers RS232 or RS485 interface with external computer (upper computer system) connection, and exchange data.
The system of basic workflow is: reader through the antenna send certain frequencies of rf signals, when the rf card to enter the antenna working area induced current, rf cards gain energy to be activated, rf cards will own coding information through the card built-in transmitting antenna send out, System receiving aerial from rf card from the carrier signal, the antenna of a regulator to the reader, the reader to receive a signal and demodulates and decodes to the system to deal with the relevant ； the main system based on logic, determine the legality of smart cards, in different settings make the appropriate treatment and control signals control and direction of movement. in the coupling between inductors and electromagnetic way (), communication process (FDX, HDX, SEQ)、From rf card to the reader of data transmission of the load method (modulation, reverse scattering, high time harmonics) and frequency, from the contact method transmission a fundamental difference, but all the reader in principle, and the decision of the design structures are very similar. all the reader is a simple matter of high frequency and control unit two basic module. high frequency interface includes both transmitters and receivers, its functions include: to produce high-frequency transmit power to start and provide rf card energy. To launch signal used to send data to rf CARDS, Receive and demodulation of high frequency signals from rf CARDS. Different rfid system with some difference frequency interface design, the system frequency inductive coupling interface diagram shown.
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