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Problems and development prospects of RFID electronic tags

as one of the automatic identification systems, bar code technology, although up to 3.5 meters, was mature more than 30 years ago, but few enterprises were willing to adopt it at that time. It was not until 1984 that Wal Mart and other large retailers forced their suppliers to adopt this technology that the application of bar code expanded rapidly. Now, as the world's top retail giants, Wal Mart, JCK and Metro require their suppliers to provide goods with RFID (radiofrequencyidentification) tags. This is undoubtedly the market demand that drives Wal Mart to choose more advanced automatic identification technology. Compared with the contact bar code technology, RFID is a non-contact automatic identification technology. Its powerful function, large information capacity, readable and writable performance make it more advantageous in commodity circulation

after a long transition from bar code technology to RFID technology, the construction of library automation has achieved a qualitative leap: with RFID technology, the borrowing rate of Singapore Library has increased 30 times, saving us $28million in expenses and the human cost of 2000 staff every year

1 bar code and RFID electronic tag introduction

1.1 bar code system

bar code system is a kind of binary code, which consists of parallel lines and separated gaps to form data. A sequence composed of wide and narrow lines or gaps can be interpreted with numbers/letters. It is read out by laser scanner (we now call it light pen), that is, it is read out by different reflections of laser on black lines and white gaps. Although their physical structures are the same, the code structures of about ten types of bar codes used today also include obvious differences between ensuring that machinery and equipment can operate as effectively as possible. The library uses bar code 39

1.2 RFID electronic tag

rfid electronic tag is composed of tag antenna (or coil) and tag chip. The chip is a single-chip system with wireless transceiver and storage functions. It stores electronic data in a certain format and can identify information as needed. RFID electronic tags are divided into passive tags and active tags. Libraries use passive tags (the following tags refer to such tags). After receiving the signal from the reader, the tag sends the information stored in the chip with the energy obtained by the induced current, so it is also called passive tag. RFID electronic tags can be made into various shapes and sizes. They are extremely thin and flexible. They can be adhered to various information carriers except metal, with high security

2 comparison of the advantages and disadvantages of the two

when the light pen reads the bar code, the manual operation is inefficient, and it must be handled one by one, which is easy to make mistakes, labor-intensive, and greatly affected by environmental conditions; In comparison, RFID electronic tags have more advantages: its reader does not need visible light source, has penetrability, can read information directly through external materials, can process multiple RF tags at the same time, batch processing, simplifies labor intensity, and tracks the location of items in real time. Errors are extremely low, and it is not greatly affected by environmental conditions. The advantages and disadvantages of the two can be seen in the above table

3problems and development prospects of RFID electronic tag

from bar code to RFID electronic tag, it has also experienced the process of bar code, bar code + RFID electronic tag RFID electronic tag, continuous development, exploration and improvement. RFID technology, together with library information system, provides a great opportunity to create a digital and automated library, but there are some problems in RFID electronic tags that need to be solved urgently:

(1) privacy issues: transparent management, effective cost reduction, and security are of great concern

(2) technological breakthrough: according to a survey conducted by the organization auto idcenter, even with double labels, 3% of RFID can't be read; Only 78% of the volume labels with only one label were correctly read. In addition, the directionality of RFID tags and readers and the fact that RFID signals are easily blocked by objects also pose a major challenge to the future development of RF technology

(3) cost reduction: in September 2005, the second generation (Gen2) label production and one RFID electronic label price reduction came out one after another: alientechnologies announced that its first generation Classl label price would be reduced to L9 US cents under the order volume of 1million or more (see: alien technology company announced that the RFID electronic label price would be reduced to 12.9 US cents), RSI claims that its second-generation labels will be less than 15 cents when the mass production is greater than or equal to 1million (see: rsiid produces 2million Gen2 labels per month), while averydennison announced that its second-generation inlay module (inlay) can reach 7.9 cents under the same demand (see: averydennison launched 7.9 cents Gen2 embedded module). We can't help thinking, if things go on like this, will the legendary 5-cent RFID electronic tag be realized soon? At present, the price of RFID electronic tags is still very high. RFID electronic tags are divided into level 0, level 1, level 2, level 3, level 4 and level 5. The higher the level, the more functions, and the higher the price

(4) the formulation and implementation of international standards based on the force value of the tested section of the electronic tensile testing machine: common RFID for libraries; The specification of electronic label is is015693 standard, 128b~eeprom, 13.56MHz working frequency. RFI has caused an impact on the application of d electronic labels in libraries. Although it still has some problems, I believe that in the near future, with the continuous improvement of technology, the degree of automation, intelligence and digitization of libraries will be greatly improved, and its development prospect is broad