Application of RFID Technology in Electronic Product Export-oriented Enterprises – Practical Application of UHF RFID Technology in Dongguan Jiacai and Funai Factory
chrispeng [ad_1]
With the rapid development of electronic identification technology, since 2005, Wal-Mart and Sam’s Club have put forward UHF RFID requirements for their top 600 major suppliers. Many export-oriented enterprises of electronic products gathered in Dongguan City, such as Dongguan Funai Electric Factory and Dongguan Jiacai Electronics Factory (hereinafter collectively referred to as Jiacai), produce TVs, LCD TVs, DVD players, projectors, color TV DVD recorders And other home appliances, all products are exported to the United States, Japan and Europe and other markets. Jiacai Factory is a supplier of Wal-Mart. According to Wal-Mart’s RFID promotion plan, in 2007, the factory needs to use outer packing boxes and pallets with UHF RFID paper labels for supply. If this requirement is not met in 2008, it may lose the qualification to supply Wal-Mart. Jiacai started to implement the RFID project in the UHF frequency band at the end of 2006 through a year of research and field testing.
From the practical application experience of RFID ultra-high frequency band technology in manufacturing enterprises, this paper introduces the practical difficulties encountered in the application and the methods to solve them, and provides a reference for the application of RFID technology in manufacturing enterprises.
1 Choice of plans
1.1 Application Requirements Analysis
When designing the entire RFID system, the most basic requirement is to consider how to achieve the highest reading rate of the tag, use the correct tag in the right place, and adjust the position of the reader antenna to match the tag to achieve the best reading effect.
2 Solutions to problems encountered in implementation
2.1 Label issues
(1) The label cannot be read at all: the reason is a) the chip is damaged; b) the antenna is damaged; c) the chip and the antenna sticker are peeled off.
(2) The label can be written, but cannot be read: the reason is a) the label printer is in operation (after the data is written), and the above three situations (1) are generated on the label during the printing process; b) the label is used and pasted during the process. , the chip, antenna, chip and antenna sticker part of the label come off.
(3) The tag can be read and written, but cannot be read after a period of time: the reason is a) During the production process of the tag, the part of the chip and the antenna bundled with excessive stress, when the stress recovers after a period of time, the stress makes the chip and the antenna contact Points fall off, causing the label to not work; b) The label is used in the production process. Based on the above various analyses, for the four sample labels provided by Jiacai, after testing, the main reasons for their inability to work are:
(1) Chip damage (normal damage rate is 1%)
(2) The collision and friction during the use of the label make the conductive adhesive properties of the label oxidized and cause the label to work unstable.
Through the test and analysis of the above problems, we basically found the cause of the problem, and made corresponding adjustments to the process links that may have the above impact on the electronic label in the production process. The power of the reader antenna, changing the sticking order of labels to sticking first and then reading (the data of the label has been written when it arrives at the production line), etc. At present, the readability rate of the RFID labels on the in-stock products on the production line of the factory has reached 99.9%.
2.2 Read range of the reader
Due to the actual installation location of the production line, sometimes the reader antenna on one line will sense the information on the irrelevant labels on the adjacent production line, resulting in data confusion. Through analysis, the best solution is to adjust the sensing range of the reader antenna to a suitable area. Through laboratory tests and on-site debugging, the reader can adjust the sensing area of the antenna as needed by adjusting the middleware, and this problem has been successfully solved.
2.3 Application software
When designing application software, it is necessary to first determine whether the label is serialized according to the requirements of the customer, whether serial number control is required, determine the number change rules (information coding rules), and solve the problem of product number identification. We made the software realize that when the label data is missed, it can automatically alarm, output the signal to the programmable controller on the production line, stop the line, and deal with the problem manually.
3 Conclusion
Barcode identification technology has been widely used in our daily production and life. Compared with barcode technology, RFID technology can read multiple labels at the same time (barcode can only read one label at a time), and it can be used in transportation, receipt and delivery. And other work that requires a lot of data collection can greatly reduce labor costs and improve efficiency; RFID technology can perform wireless long-distance reading of data within the range covered by the reader antenna (barcode reading distance is short), and more importantly This automatic operation can increase the frequency of data collection compared with manual operation, and can collect data in more places, so that people can accurately understand the status of products in the supply chain and their location; in addition, RFID tags can also be used in Write new information in the label, and the data can be modified at any time as needed (the information content of the barcode cannot be changed). This real-time and accurate information can reduce out-of-stocks, expand sales, improve the operational efficiency of funds by reducing safety stocks, and track products. flow direction. These properties are enough to change our lives. However, the advantage of barcode identification is that it provides basic identification capabilities with the lowest cost (ink) identification, while RFID technology provides more functions, but the cost is higher.Now, the ISO 18000-6 standard used by RFID technology is compatible with the standard adopted by barcodes, and the two can work seamlessly together. As key technologies, barcodes and RFID may coexist for a long time.
At present, the bottleneck restricting the large-scale application of RFID technology is not only the price factor of the label, but also the waterproof performance of the UHF label at the technical level, the signal of the UHF label on the metal has dropped significantly, and the standards have not been fully established. As far as the price of RFID tags is concerned, as their usage increases, their costs will inevitably drop significantly. There is no doubt that UHF ultra-high frequency technology will be widely used in the future.
[ad_2]
