RFID technology has always been regarded as one of the main technologies for implementing IoT applications. The prospects are very promising. In many fields, RFID technology is the key to achieving the target function. However, in actual promotion, we find that RFID is not the case. There are some objective obstacles to the application promotion, mainly from four aspects:

        1. The price cost is too high.
The high price of RFID from tags to chips to readers and middleware, coupled with system deployment costs, system maintenance costs, and possible market acceptance risks, has seriously hampered the marketing of RFID. At present, the average price of domestic readers is more than 5,000 yuan, and the ultra-high frequency readers are more than 10,000 yuan.

2. Technical restrictions.

RFID technology is not yet fully mature, and it is embodied in three aspects. First, it is applied to some special products, such as liquid or metal cans, and a large number of RFID tags may not work properly. Second, the traditional electronic label manufacturing process is still relatively complicated. The label needs to be chemically immersed for labeling, and the label failure rate is high. Third, the RFID tag and the reader are directional, and the signal is easily blocked by the object. Even if a double tag is attached, 3% of the tag cannot be read.

3. Standardization issues.

RFID has not yet formed a unified industry standard. On the technical level, the technology of RFID readers and tags is not unified, and there is a possibility that they cannot be integrated. Within the industry, different types of label communication protocols, frequency bands, and packet formats developed by different manufacturers can cause confusion and confusion in use.

4. Security issues and privacy protection.

Once the RFID tag is close to the reader, it will automatically send out the information unconditionally, and it is impossible to determine whether the reader is legal. Passive RFID systems do not have read and write capabilities and cannot use key authentication methods for authentication. This involves the protection of personal privacy and business security.

Although faced with difficulties, it does not need to be sad and desperate. At present, two important factors hindering the development of RFID: price and technology have made great breakthroughs. More and more manufacturers are involved in RFID, and RFID has matured through long-term and rapid technology accumulation. The improvement of system integration stability and the improvement of electronic label technology have promoted revolutionary changes in RFID, and the breakthrough in price competition and technical difficulties has drastically reduced the price of RFID-related equipment.

New application of RFID technology

For the application of RFID, we use it as the main means of anti-counterfeiting identification, and it acts as a security tracking technology in railway security. In public security, we use it as the quality assurance of traceability tracking. Recently, at the graduation ceremony of Dallas Dessex University in the United States, we have seen a new application of RFID.

Everyone thinks that the moment he graduated from college is an important moment in his life. This time is very short and precious. I hope that my family and friends can witness for myself. The difficulty is that in just a few seconds, parents may not be able to recognize it. do it yourself. As a result, students at the university invented the UHF-based EPCGen2 standard RFID technology to ensure that family members and friends watch the graduation ceremony, or through the Internet, let them know when their loved ones have graduated. The stage of the ceremony.

New application of RFID technology

This was collected by an Alien ALR-9650 reader, which scanned the RFID badges of each of the graduates on the stage. The reader wirelessly transmits information to the computer system and then projects each student's information onto the screen.

The application of this RFID technology is a success for students to apply the knowledge they have learned in practice, and it also opens up a wider space for the application of RFID technology.

The difference between RFID and NFC

Another technology, NFC technology, which is very similar to RFID technology, has a good application in the current market. NFC is developed on the basis of RFID. NFC is essentially not much different from RFID. It is based on signal transmission between two objects with similar geographical locations. However, NFC and RFID are still different. NFC technology adds point-to-point communication function, which can quickly establish P2P (peer-to-peer) wireless communication between Bluetooth devices. NFC devices look for each other and establish communication connections. The two devices of the P2P communication are peer-to-peer, and the devices of the RFID communication are master-slave relationships. There are some technical details in the rest: NFC has some characteristics such as close distance, high bandwidth and low energy consumption compared with RFID technology.

details:

1. NFC is limited to the band of 13.56MHz! The RFID frequency band has low frequency (125KHz to 135KHz), high frequency (13.56MHz) and ultra high frequency (860MHz to 960MHz).

2. Working effective distance: NFC (less than 10cm, so it has high security), RFID distance from a few meters to tens of meters!

3. Because it works at 13.56MHz, NFC is compatible with existing contactless smart card technology, so many manufacturers and related groups support NFC, and there are many RFID standards, and the unity is more complicated (it is estimated that it is impossible to unify), only Can use the corresponding technical standards in special industries with special needs!

4. Applications: RFID is more widely used in production, logistics, tracking, and asset management, while NFC plays a huge role in the fields of access control, public transportation, and mobile payment.

Another corner of NFC

NFC's low cost, ease of use and more intuitive features make it more potential in some areas - NFC can achieve a variety of devices in a few centimeters through a combination of a chip, an antenna and some software Communication within the range, and the cost is only 2 to 3 euros. According to ABIReasearch's latest research on NFC, the NFC market may be on the mobile handset. ABI estimates that by 2005, there will be smartphones and enhanced handheld devices using NFC chips. By 2009, such handheld devices will account for more than half of the market. Research firm StrategyAnalyTIcs predicts that by 2011, global mobile phone-based contactless payments will exceed $36 billion. If NFC technology is gaining popularity, it will largely change the way people use many electronic devices, and even change the way they use credit cards, keys and cash. As an emerging technology, NFC roughly summarizes the shortcomings of poor interoperability of Bluetooth technology. After several years of sluggish domestic market, NFC has been recognized by all parties in the market. At the same time, the NFC industry chain has matured and the market environment has given a good opportunity for NFC development. The above factors have enabled the rapid deployment of mobile payment in China and 2012, and the market scale has increased rapidly.