Radio frequency identification technology is not uncommon in the display of life. RFID technology based parking management, access control management, building location tracking, warehouse management, etc. all use active RFID technology. Active RFID, also known as Active RFID, is a type of electronic tag that is divided according to the way the electronic tag is powered. It usually supports remote identification. Electronic tags can be classified into active tags, passive tags, and semi-passive tags. The active electronic tag contains a battery, the passive radio frequency tag does not have a built-in battery, and the semi-passive tag (Semi-passivetag) partially relies on the battery. Compared with passive RFID technology, active RFID technology has unparalleled advantages, such as long recognition distance, large amount of transmitted data, small transmission power, reliability and compatibility. With the rapid development of technology, the drawbacks of active RFID, which are relatively expensive and have a short service life, are constantly being overcome. In the near future, it will be more widely applied to our daily lives, forming a convenient, An efficient, ubiquitous network of perceptions. However, the active RFID industry has swarmed from the fire of the stars in 2004 to a large number of enterprises. The growth of the market has also created a situation of arrogance and arbitrage. Many enterprises are faced with the dilemma that sales are not going up and profits are declining year by year. The frequent price wars in recent years are obviously not the way for the industry to continue to develop. First, the continuous improvement of technology is the "golden key" to solve the problem of active RFID Active RFID is the product of technological advancement, and the bottleneck of its development must also be broken through further innovation of technology, thus opening up a new golden period of development. Under current conditions, advances in technologies such as batteries and chips can effectively improve active RFID performance. Active electronic tags are battery powered, and low power consumption is the primary issue. In recent years, the low-frequency trigger electronic tag has been activated and started to work in the low-voltage trigger range of 125K. Once it leaves the trigger zone, the tag is in a low-power sleep state, thus solving the problem that most of the energy of the electronic tag is wasted. Extends its service life. The relatively high cost of active RFID has been one of its biggest weaknesses. Today, button cells with lower power circuits are already suitable for many applications, and the printed battery proves its practicality. In the future, micro fuel cells, photovoltaic cells and other forms of energy will gain more applications. There is no doubt that advances in these battery technologies will help reduce the cost and size of active electronic tags and open the way for diverse applications. In addition, with the upgrade of chip technology, such as improving the process of silicon wafers, reducing layout layout, using lower power electronic components, or improving chip materials, streamlining compiled language, can effectively improve read and write distance and increase storage capacity. Reduce processing time. Second, the combination of active RFID and sensors is the trend of the times In 2009, the concept of the Internet of Things was born and has been included in the 12th Five-Year Development Plan by the state. What is the Internet of Things? The first is to perceive everything, then data acquisition, network transmission. Active RFID is essentially a kind of short-range wireless communication, and the essence of communication is to carry information, so whether the information carried is valuable, and the amount of value determines the value and profitability of active RFID. In the future, active RFID will no longer be limited to carrying only simple ID numbers, but will carry more valuable information. Taking parking management as an example, 2.4G electronic tags and readers are usually used together to solve the non-stop access control. This mode has many drawbacks, battery life is short, and problems such as following the car are difficult to solve. With the addition of the 125K low frequency activator, these problems are solved, which is a model of the combination of sensors and active electronic tags. The 125K exciter not only has the address code as the identification, it also transmits information such as the electromagnetic strength RSSI, and its low frequency triggering part is actually a magnetic field sensor. There is no doubt that in the future, active RFID will be combined with various sensors to achieve greater performance, thus opening up a broader application space and market prospects. Third, the active RFID market demand is heating up under the promotion of national policies. Since the development of the Internet of Things was officially included in the national development strategy in 2010, China's RFID and Internet of Things industry has ushered in a rare development opportunity. In April 2011, the Ministry of Industry and Information Technology and the Ministry of Finance set up special funds for the Internet of Things to promote the rapid development of the industry. By 2012, China's RFID market has reached 23.66 billion yuan, ranking third in the world. In February 2012, the Ministry of Industry and Information Technology officially released the “Twelfth Five-Year Development Plan for the Internet of Thingsâ€, indicating the future development path of the industry. Under the background of the government's vigorous promotion of the development of the Internet of Things industry, the country's series of promotion policies have become a powerful source of power for the development of China's active RFID industry. For example, in the main points of the work of the Internet of Things in 2014, the Ministry of Industry and Information Technology has applied the demonstration of key areas such as transportation as one of the key tasks in the year, and required 1-2 demonstrations of new technologies for vehicle networking with independent intellectual property rights, including navigation and positioning. Emergency rescue, anti-collision, energy saving and emission reduction, illegal vehicle inspection, and combating crimes involving vehicles, etc., carry out vehicle identification and electric bicycle intelligent management of IoT application demonstration and promotion. Other ministries and commissions are also working together to promote RFID application demonstration projects. The number of active RFID-related key application projects such as smart grid and medical health has increased significantly, and the scope has expanded rapidly. The market demand for personnel positioning, asset management, and industrial management has begun to heat up. With the construction of smart cities in the country, the active RFID industry will usher in a period of rapid growth. Fourth, the unification of industry standards is expected to reduce obstacles to the development of active RFID products The non-uniformity of standards makes the products launched by various enterprises not universal, which inevitably creates obstacles to product development. In the future, this situation is expected to improve with the unification of standards and the efforts of relevant state departments and people of insight. In April 2014, the proposal for the international standard for radio frequency identification (RFID) with independent intellectual property rights submitted by China was approved by the NP stage and officially approved. The national standard was revised and improved based on the national standard "Information Technology Radio Frequency Identification 2.45GHz Air Interface Protocol" (GB/T28925-2012). The proposal mainly specifies the air interface communication protocol and working method between the reader and the tag in the active RFID system working in the 2.45 GHz band. It has the characteristics of large tag storage capacity, long communication distance and high security strength. The combination of technology and sensor technology can realize the wireless sensor monitoring and positioning function of the measured object. It is one of the basic core standards of the Internet of Things standard system. It is complex in container management, asset monitoring, personnel monitoring, vehicle and ship identification. The active RFID application has broad prospects, paving the way for product standardization and application scale.
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