Classification of RFID technology and Principle Analysis
Update Time:2013-08-28
 What is RFID technology?
RFID radio frequency identification is a non-contact automatic identification technology that uses radio frequency signal automatic target recognition and access to relevant data, identify work without human intervention, can work in a variety of harsh environments. RFID technology can identify fast moving objects can also identify multiple tags, the operation quickly and conveniently.
RFID is a simple wireless system, only two basic components, the system for control, object detection and tracking. System consists of an interrogator (or reader) and a lot of transponder (or tag) components.
Classification of RFID
RFID frequency by application is divided into different frequency (LF), High Frequency (HF), Ultra High Frequency (UHF), microwave (MW), the representation of the corresponding frequencies were: LF 135KHz less high frequency 13.56MHz, ultra- HF 860M ~ 960MHz, microwave 2.4G, 5.8G
RFID in accordance with the energy supply is divided into passive RFID, active RFID, and semi-active RFID. Passive RFID reader from the past, low prices; active RFID can provide longer read range, but requires battery power, the cost to be higher for long-distance reader applications.
What are the basic components of RFID?
Tag (Tag): the coupling components and chips, each tag has a unique electronic code, attached to the object to identify the target object;
Reader (Reader): read (sometimes also write) tag information devices can be designed for handheld or fixed;
Antenna (Antenna): between the tag and reader radio frequency signal transmission.
RFID technology, the basic working principle is what?
The basic working principle of RFID technology is not complicated: Tag into the magnetic field, readers receive the RF signal emitted by virtue of induced current obtained by sending out the energy stored in the chip of product information (PassiveTag, passive tags or passive tags), Or take the initiative to send a signal frequency (ActiveTag, active tags or active tags); reader to read and decode the information, to a central information system for data processing.
A complete RFID system is determined by the reader (Reader) with electronic tags (TAG) is the so-called transponder (Transponder) and application software systems composed of three parts, its working principle is launching a specific frequency Reader radio wave energy to the Transponder, Transponder circuit for driving the internal data sent, received the order at this time Reader will interpret data sent to the application will be handled accordingly.
With RFID card reader and electronic communications between the labels and the energy point of view generally can be divided into induction, inductive coupling (InductiveCoupling) and backscatter coupling (BackscatterCoupling) two kinds, generally low-frequency RFID mostly using the first-in, while the higher frequency they use the second approach.
Reader according to different structures and techniques may be read or read / write device, the RFID system information control and processing center. Usually coupled to the reader module, the transceiver module, the control module and interface unit. Between reader and transponder generally use half-duplex communication for information exchange, while the reader through a passive transponder coupled to provide energy and timing. In practical applications, can be further achieved via Ethernet or WLAN and other identifying information of the object collection, processing, and remote transmission and other management functions. Transponder information carrier is an RFID system, the transponder is mostly present originals by the coupling (coil, microstrip antennas, etc.) and micro-chips passive element.
What makes the retailer so respected RFID?
According to the company's retail analyst estimates SanfordC.Bernstein, through the use of RFID, Wal-Mart could save $ 8.35 billion annually, mostly because you do not purchase a barcode manually check the savings in labor costs. Despite the additional $ 8 billion, some analysts believe this figure is too optimistic, but there is no doubt, RFID can help solve the problem of the two largest retail trade: goods out of stock and loss (due to theft and supply chain to be disturbed for the loss of product) , and now is the theft of a single Wal-Mart loss of almost a year is 20 billion dollars, if a legitimate business turnover can reach this figure, it is possible in the United States 1000 largest companies list ranked No. 694 . Research firm estimates that RFID technology can help to reduce theft and inventory levels by 25%.
Typical applications of RFID technology is what?
1, the product performance: most of the products due to covering the frequency 868MHz to 915MHz, the system requirements of the corresponding read-write device can be reduced, reduce the sensitivity of the frequency deviation.
2, the product line: EPCCLASS1GEN2 and ISO18000-6C.
3, professional services: targeted use of the world's advanced product experience, specifically oriented to commonly used products that do special consideration.
4, adaptation: logistics and supply management, manufacturing and assembly, airline baggage handling, mail, express parcel processing, document tracking, library management animal identity, sports timing, access control, electronic tickets, automatic toll road from the large long-range UHF tags to small UHF tags. Customers can make customized production to meet various requirements.
RFID Description
Meeting international ISO15693, ISO18000-6B, EPCG2 other standards, using different antenna designs and packaging material can be made of various forms of labels, such as vehicle labels, pallet labels, logistics labels, metal labels, book labels, label liquid , personnel access control labels, tickets labels, luggage labels. Customers may need to select or customize the corresponding electronic label.
Inlay
Can be packaged into various forms of electronic tags. Applied to the label and OEM customers label production, as well as large quantities of ...
Label
Peel the backing paper pasted directly on the paper box on the realization "that is affixed to shipping" process. For logistics, supply chain management, etc. ...
Standard card
PVC laminated standard cards, holding in your hand or worn on the chest. Mainly used in personnel management, library management and vehicle management, etc. ...
Metal tag
Metal tag, can be directly pasted on the device with a metal housing. Mainly applied to the chassis, boards and other asset management fields. ...
Vehicle tag
Pasted directly on the upper inner surface of the windshield or inserted in the label holder with. Mainly used in automotive management. ...
Tag labels
Hanging objects to be identified on the attached. Mainly used in high-end clothing and asset management. ...
Animal Tags
Using a dedicated animal ear tag pliers, the label fitted with livestock ear. Mainly used for animal breeding, disease prevention and control, meat quarantine ...
Pallet labels
When used directly into the plastic tray clearance holes through the positioning hole with a nail or a label fixed to the wooden pallet center. Mainly suitable ...
Tickets label
Hold in your hand or worn on the chest. For access to evidence and ticket management meetings and other fields. ...
Luggage tags
Peel the backing paper pasted directly on the object to be identified. Mainly applicable to airline baggage management, postal parcel management, logistics tracking tube ...
Books tab
Pasted directly within the book. Mainly used in libraries, bookstores and other places. ...
Jewelry tag
When used to all kinds of jewelry hang tag on the ring, you can normally use, easy jewelry industry management of all types of jewelry products.
RFID reader device
Only when reading and writing devices, RFID can play its role. RFID reader device with RFID reader, RFID reader module, currently on the market are relatively high cost and YW-201 YW-601U and YW-601R and so on. These devices can be read from or written to the RFID data, and to achieve a good encryption. Distances are WV-CID1500, WV-VID1500 distance can reach 1.5 km.
Metals and liquid environment impact of RFID
RFID UHF (UHF) Tag backscatter due to electromagnetic (Backscatter) characteristics of the metal (Metal) and the liquid (Liquid) and other environmental sensitive to the operating frequency to cause this passive tag (Passivetag) having a metal surface is difficult to objects or liquid environment for work, but such issues as technology development has been fully resolved, for example, Han Shuo (SONTEC) label the company that developed on the metal or liquid environment for the application of passive tags intact reading products, to facilitate the application of the above circumstances deployment environment or RFID.

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