RFID (Radio Frequency Identification) is an automatic wireless identification and data acquisition technology that has been widely used in many fields. This paper introduces the basic concepts and performance characteristics of RFID technology, and analyzes the application fields and future development trends of RFID technology.

First, the basic concept of RFID technology

RFID technology, also known as radio frequency technology or radio frequency identification technology, is a non-contact automatic identification technology that can identify specific targets and read and write related data through radio signals without establishing mechanical or optical interaction between the system and a specific target. contact. RFID technology uses radio frequency for contactless two-way communication to achieve identification purposes and exchange data. The RFID identification work does not require manual intervention and can work in a variety of harsh environments. RFID technology can recognize high-speed moving objects and recognize multiple labels at the same time, which is quick and easy to operate.

Second, RFID technology performance characteristics

1. Quick scan. The RFID recognizer can simultaneously recognize and read several RFID tags.

2. The size is small and the shape is diverse. RFID is not limited in size and shape on reading, and it does not need to match the fixed size and print quality of the paper for reading accuracy. In addition, RFID tags can be developed into smaller and more diverse forms for use in different products.

3. Anti-pollution ability and durability. Traditional bar code carriers are paper and are therefore susceptible to contamination, but RFID is highly resistant to substances such as water, oil and chemicals. In addition, since the bar code is attached to a plastic bag or an outer carton, it is particularly susceptible to breakage; the RFID tag is to store data in the chip and thus be protected from fouling.

4. Can be reused. Nowadays, barcode printing cannot be changed after it is printed. RFID tags can repeatedly add, modify, and delete data stored in RFID tags to facilitate information update.

5. Penetrating and barrier-free reading. In the case of coverage, RFID can penetrate non-metallic or non-transparent materials such as paper, wood and plastic, and can communicate transparently. The barcode scanner must be able to read the barcode at close range without object blocking.

6. The data has a large memory capacity. The capacity of the one-dimensional barcode is 50 Bytes, the maximum capacity of the two-dimensional barcode can be stored from 2 to 3000 characters, and the maximum capacity of the RFID is MegaBytes. With the development of the memory carrier, the data capacity has also been expanding. The amount of information that will be carried in future items will increase, and the demand for capacity expansion of the volume label will increase accordingly.

7. Security. Since RFID carries electronic information, its data content can be protected by passwords, making its content difficult to be forged and altered.

In recent years, RFID has attracted attention due to its long-distance reading and high storage capacity. It not only helps a company to significantly improve the efficiency of goods and information management, but also allows sales companies and manufacturing companies to interconnect, so as to more accurately receive feedback, control demand information, and optimize the entire supply chain.

Third, RFID technology application areas

RFID is an automatic wireless identification and data acquisition technology that has been used for many years and has more and more applications. Today, smart chips with readable and writable memory that protects against unauthorized access are already visible in many containers, pallets, product packaging, smart ID cards, books or DVDs.

1. Logistics supply area.

Applications will continue to focus on supply logistics, where RFID transceivers are used to record and track a wide range of mobile goods/products, in RFID transceivers (credit card-sized plastic/paper labels, including chips) The necessary storage on the RF section and the antenna will continue to be a major application.

2. Transceiver label application.

Transceiver label applications that attach transceiver labels to textiles, pharmaceutical packaging, or even individual kits are also applications of RFID technology.

3. Passive electronic tag applications.

High-frequency RFID technology mainly uses passive electronic tags, in the communication, logistics, customs, exhibition access documents, clothing, corporate asset management, industrial products flow.

4. Automotive system applications.

RFID will also be used in the field of intelligent detection. Rapid identification is important for the company's logistics processes, the transportation of large warehouses, clinics or goods, and in business. For example, the car table and chair must be color ordered into the assembly line at the correct time; the smart tag will automatically detect that the correct drug container is moved from the storage to the production site; the blood sample will correspond exactly to the patient who collected the blood sample; The supply of fresh goods required by supermarkets requires a very complex transmission network. This network does not allow errors; there will be no fake tickets for the 2006 World Cup tickets - thanks to the RFID chip.

5. Applications in the automotive industry.

Another focus is on the automotive industry, such as controlling mirrors, all electric motors and automotive door lighting. Looking further afield, electronic ticketing, "e-passport", and even dedicated communications services have already revealed the opportunity for RFID-IC applications. Bundesbank of Germany expects RFID to be used in banknotes. This type of banknote is different from today's banknotes and cannot be simply forged by color printers or copiers. In fact, it is necessary for chip manufacturers to produce RFID that is as thin as paper and as large as sand. -IC.

Fourth, the development trend of RFID technology

Nowadays, China has also begun to develop its own RFID standards, adhere to the principle of “application-driven standards and standard application”, and timely adopt the applicable standard frequency to give Chinese enterprises a space and time for rapid development. At present, the specific standard content has not been fully implemented, but it is certain that coding management, core technology and database are the focus of future RFID work.

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