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Radio frequency identification (RFID), also known as radio frequency identification (RFID), is a communication technology commonly known as electronic tags. Radio signals can be used to identify specific targets and read and write related data without having to identify mechanical or optical contact between the system and a particular target.
The origin of RFID technology
RFID technology originated in the United Kingdom and was used in the Second World War to identify the identity of enemy aircraft. It was commercialized in the 1960s. RFID technology is an automatic identification technology. The US Department of Defense stipulates that all military supplies must use RFID tags after January 1, 2005. The US Food and Drug Administration (FDA) recommends that drug manufacturers use RFID to track frequently from 2006. Counterfeit medicines. Walmart, Metro's retail application of RFID technology and other actions is driving the RFID application boom. In 2000, the price of each RFID tag was $1. Many researchers believe that RFID tags are very expensive and can only be applied on a large scale if they are reduced in cost. In 2005, the price of each RFID tag was around 12 cents, and the price of UHF RFID is now about 10 cents. For large-scale application of RFID, on the one hand, it is necessary to reduce the price of RFID tags, and on the other hand, whether it can bring value-added services after applying RFID. According to statistics from the European Union Statistics Office, in 2010, 3% of companies in the European Union applied RFID technology, and their applications were distributed in identity documents and access control, supply chain and inventory tracking, car charging, anti-theft, production control, and asset management.
Where is RFID technology currently used?
The RF tag is the physical carrier of the Electronic Product Code (EPC) that attaches to traceable items and is globally circulated and identifiable and readable. RFID (Radio Frequency Identification) technology has attracted people's attention in recent years as a key technology for building the "Internet of Things."
Currently, RFID technology is mainly used in logistics and supply management, manufacturing and assembly, air baggage handling, mail/fast parcel processing, document tracking/library management, animal identification, sports timing, access control/electronic tickets, automatic road tolls. , card, storage, plastic trays, turnover baskets, medium-sized applications.
Why do we use RFID technology?
Because RFID is a flexible application technology that is easy to handle, simple and practical, and especially suitable for automated control. Can work freely in a variety of harsh environments: short-range RF products are not afraid of oily, dusty pollution and other harsh environments, can replace bar codes, such as used in the factory line to track objects; long-range RF products are used for transportation, identification distance can be Up to tens of meters, such as automatic charging or identification of vehicle identity. Radio frequency identification systems have the following system advantages:
Easy to read: Data is read without a light source, or even through an outer package. The effective recognition distance is larger, and when the active label with the battery is used, the effective recognition distance can reach more than 30 meters;
Fast recognition speed: When the tag enters the magnetic field, the reader can read the information in real time, and can process multiple tags at the same time to realize batch identification;
Large data capacity: 2D barcode (PDF417) can only store 2725 numbers; if it contains letters, the storage will be less; RFID tags can be expanded to 10K according to user needs;
Long service life and wide application range: its radio communication method can be applied to high-pollution environment and radioactive environment such as dust and oil, and its closed packaging makes its lifespan greatly exceed the printed bar code;
Tag data can be dynamically changed: the programmer can write data to the tag, giving the RFID tag the ability to interactively load portable data files with less write time than printed barcodes;
Better security: not only can be embedded or attached to different shapes and types of products, but also can be password protected for reading and writing of tag data, thus providing higher security;
Dynamic real-time communication: the tag communicates with the reader at a frequency of 50 to 100 times per second, so that as long as the object attached to the RFID tag appears within the effective recognition range of the reader, its position can be dynamically tracked and monitored. .
Security's demand for RFID is increasing
Based on various kinds of RFID, RFID is one of the key technologies of security and Internet of Things. At present, related products and system solutions are becoming more and more abundant, and market applications are gradually deepening, and the application fields are continuously expanding and extending. Especially in the application of products and solutions such as intelligent transportation, smart parking, smart access control, radio frequency anti-theft, RFID plays an increasingly important role.
The rapid spread of RFID technology in the security industry is inseparable from its many performance characteristics, such as rapid scanning, small size, diverse shapes, reusable, penetrating and barrier-free reading, large data memory capacity, and pollution resistance. The advantages of environmental adaptability, such as durability, enable RFID to cope with a variety of complex environments and ensure data security on the basis of large information storage capacity, data can be updated at any time, and readable and writable.
Of course, there are some constraints in the application of RFID in the security industry, but it is precisely because of these shortcomings that RFID is constantly developing new encryption technology, while improving research and development capabilities to reduce costs, for the rapid development of RFID technology in the security field. Development has constantly cleared the way.
Conclusion
Of course, every technology has its advantages and disadvantages. The development of RFID technology to today will also have its drawbacks. That is, the technical application of UHF frequency band is not wide enough, the technology is not mature enough, and the high price is prohibitive and convenient. Readability brings the possibility of information leakage. If one day in the future, RFID technology is perfected, RFID UHF technology is mature, and the development of RFID UHF market is widely used, the development of Internet of Things will also push to a new height.