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RFID Technology Is Not Far Away From Us

- Jun 01, 2018 -


                             RFID technology is not far away from us

 


 

Since Amazon opened the first unmanned supermarket AmazonGo in the United States, unmanned retail stores can be described as hot. For a time, retail giants such as Ali and Jingdong have entered the game. The reason why unmanned supermarkets are able to realize unattended, is relying on a technology - RFID technology. So what exactly is RFID technology? What is the current application situation?


 1. Detailed understanding of RFID technology


RFID (Radio Frequency Identification) is also radio frequency identification, also known as electronic tag live radio frequency identification. RFID technology is a non-contact automatic identification technology. It automatically identifies target objects and obtains relevant data through radio frequency signals. The recognition work can work in various harsh environments without manual intervention.


The "Communication by Means of Reflected Power" published by Harry Stockman in 1948 in the Institute of Radio Engineers laid the theoretical foundation for RFID technology. This technology began to appear in the mid-1980s, and with the maturity of large-scale integrated circuit technology, the size of the radio frequency identification system has been greatly reduced, so it has only entered the practical stage.


It is reported that RFID technology can identify and tell moving objects and can identify multiple labels at the same time, and the operation is quick and easy. Short-range RF products are not afraid of harsh environments such as oil stains and dust pollution, and they can replace bar codes in such environments. Long-range radio frequency products are mostly used for traffic, and the identification distance can reach several tens of meters


 2. The working principle of RFID system

 

 The RFID system consists of the following components:

  1 electronic tag


Since Amazon opened its first unmanned supermarket, AmazonGo, in the United States, unmanned retail stores can be described as hot. For a time, retail giants like Ali and Jingdong have entered the game. The reason why unmanned supermarkets are able to realize unattended, is relying on a technology - RFID technology. So what exactly is RFID technology? What is the current application situation?


1. Detailed understanding of RFID technology


RFID (Radio Frequency Identification) is also radio frequency identification, also known as electronic tag live radio frequency identification. RFID technology is a non-contact automatic identification technology. It automatically identifies target objects and obtains relevant data through radio frequency signals. The recognition work can work in various harsh environments without manual intervention.


The "Communication by Means of Reflected Power" published by Harry Stockman in 1948 in the Institute of Radio Engineers laid the theoretical foundation for RFID technology. This technology began to appear in the mid-1980s, and with the maturity of large-scale integrated circuit technology, the size of the radio frequency identification system has been greatly reduced, so it has only entered the practical stage.


It is reported that RFID technology can identify and tell moving objects and can identify multiple labels at the same time, and the operation is quick and easy. Short-range RF products are not afraid of harsh environments such as oil stains and dust pollution, and they can replace bar codes in such environments. Long-range radio frequency products are mostly used for traffic, and the identification distance can reach several tens of meters.


2. The working principle of RFID system

   The RFID system consists of the following components:

   1 electronic tag


                       

图片1.png


Composed of a chip and a tag antenna, it communicates with the reader through the principle of inductive coupling or electromagnetic backscatter.


2 readers

图片2.png


It is a device that reads/writes tag information. As a data acquisition terminal, the reader/writer also needs to exchange data with middleware.

3 antenna

                                    

                                                                                   

图片3.png


                     

 

It is a device that provides spatial propagation of RF signals for tags and readers.

4 Middleware

It is the link between RFID devices and enterprise applications, and it is also the core of RFID application system.

The working principle of RFID system is as follows:

The information to be sent by the reader is encoded and loaded on the carrier signal of a certain frequency and sent out via the antenna. The electronic tag entering the working area of the reader receives the pulse signal, and the relevant circuit in the chip in the card modulates this signal. , decoding, decryption, and then judge the command request, password, permissions, and so on. If it is a read command, the control logic circuit reads the relevant information from the memory, encrypts, encodes, and modulates it, then sends it to the reader through the card antenna, and the reader demodulates, decodes, and decrypts the received signal. To the central information system for data processing; if it is a write command to modify information, the internal charge pump caused by the control logic raises the operating voltage, provides overwriting of the contents of the EEP-ROM, rewrites it, and judges its corresponding password and authority. If it does not match, an error message is returned.

3. The advantages of RFID 


图片4.png

Smart tags are also known as radio frequency identification tags, which are high-tech products in the field of labels. Today, they have played an important role in product packaging and will gradually replace traditional product labels and bar codes. Smart Label is a rookie in the field of labels. It has the function of surpassing traditional labels and is the crystallization of high technology such as electronics and computers in label printing. RFID tags are a type of smart tag. The following table compares RFID tags with magnetic cards, IC cards, and traditional bar code equivalents or early automatic identification technologies.

The

Through the comparison of the above table, the advantages of RFID technology are as follows:

Quick scan

The RFID identifier can simultaneously recognize and read multiple RFID tags. In contrast, only one bar code can be scanned at a time.

Penetrating and barrier-free reading

When covered, RFID can penetrate non-metallic or non-transparent materials such as paper, wood, and plastic, and is capable of penetrating communication. Barcode scanners must read barcodes at close range and without object obstruction. The reason why the "unmanned retail store" is able to do without cash, is also the main use of this feature of RFID technology.

Large memory capacity of data

The capacity of a one-dimensional bar code is about 30 characters, the maximum capacity of a two-dimensional bar code can store 2 to 3,000 characters, and the maximum capacity of RFID is a few megabytes. With the development of memory carriers, the data capacity has also been continuously expanding.

Small size and various shapes

RFID is not limited by size and shape in reading, and does not need to match the fixed size and print quality of the paper for reading accuracy, unlike barcodes that are prone to deformation and breakage, and thus cannot be identified. In addition, RFID tags can be developed in smaller and more diverse forms to be applied to different products.

4. Ten major applications of RFID technology in reality

In fact, RFID technology is not far away from us in reality. At present, Xiao Zhijun, the main application, summarizes ten categories. They are:

Highway Toll Collection and Intelligent Transportation System 01 





图片5.png

One of the most successful applications of radio frequency identification technology is the highway toll collection system. The application of REID technology in the automatic charge of expressways can fully reflect the advantages of this technology. In the high-speed vehicle through the toll station at the same time automatically complete the payment, to solve the bottleneck problem of traffic, improve the speed of the car, to avoid congestion, improve the efficiency of the calculation of charges, while tolls toll can be solved by the problem of corruption.

Production Automation and Process Control 02

RFID technology has many applications in the production process control due to its strong resistance to harsh environments and non-contact recognition. Through the use of RFID technology in automated flow production lines in large factories, material tracking and production processes are automatically controlled and monitored, production efficiency is improved, production methods are improved, and costs are reduced。


Automatic identification of vehicles and anti-theft 03 

The use of radio frequency identification technology can real-time monitoring, statistics, and dispatch of road traffic, and can also be used as a vehicle red light record alarm, stolen (suspicious) vehicle alarm and tracking, special vehicle tracking, accident escape vehicle investigation, and so on. According to reports, the United Kingdom plans to install radio frequency chips on automobiles, and will automatically “report” when speeding.

Electronic ticket 04

 

 One of the areas where radio frequency identification systems, especially non-contact IC cards (electronic tags) have the greatest potential for application, is the public transportation sector. Using electronic tags as e-tickets has the advantages of ease of use, shortened transaction time, and reduced operating costs.

Cargo Tracking Management and Monitoring 05

 

Radio frequency identification technology provides convenient, fast and accurate automation technology for tracking and management of goods. The automatic identification of containers with radio frequency identification technology as the core has become the world's largest cargo tracking management application. An electronic tag that records data such as the location of the container, type of article, quantity, etc. is mounted on the container. With the help of radio frequency identification technology, the exact position of the container in the goods yard can be determined. The system can also identify unaccepted container movements that are conducive to management and security.

Warehousing, distribution and other logistics links 06 

 The RFID system is used for smart warehouse cargo management. It can effectively solve the management of information related to the flow of goods in the warehouse, monitor cargo information, real-time inventory, automatically identify the goods, and determine the location of the goods.


Automatic sorting system for mail and parcels 07
 

  

Radio frequency identification technology has been successfully applied to the automatic sorting system of postal parcels the field of postal services. This system has the characteristics of non-contact and non-line-of-sight data transmission, so the direction of parcels can not Be considering in parcel transmission. In addition, when multiple targets enter the identification area at the same time, they can be identified at the same time, greatly improving the sorting ability and processing speed of the goods. Record all the characteristic data of the package, it is more conducive to improving the accuracy of sorting the packet.

Animal Tracking and Management 08

Radio frequency identification technology can be used for animal tracking and management. The small glass-encapsulated electronic tags will be implanted under the animal skin to identify livestock and monitor important animal health information, providing reliable technical means for the modernization of pasture management. In large-scale farms, the use of radio frequency identification technology to establish breeding files, vaccination files, etc., to achieve efficient, automated management of livestock purposes, while providing protection for food safety.


TheAccess Control Security 09

Future access control security systems can use electronic tags, and one card can be used in multiple ways, such as work permits, pass passes, parking permits, hotel accommodation permits and even tourist passports. The use of electronic tags can effectively identify the identity of personnel, conduct safety management, and efficiently charge fees, simplify entry and exit procedures, improve work efficiency, and effectively perform security protection. The system will automatically identify the identities of people when they enter or leave, and there will be an alarm when they break in. Where high security levels are required, fingerprints, palm prints or facial features can also be stored in electronic tags in combination with other identification methods.


Security 10


    The issue of counterfeiting is a headache in many parts of the world. The anti-counterfeiting technologies now applied, such as holographic anti-counterfeiting, will also be forged by criminals. The application of radio frequency identification technology in the field of anti-counterfeiting has its own technical advantages. It has the advantages of low cost and difficulty in counterfeiting. The cost of electronic tags is relatively cheap, and the manufacturing of the chips requires expensive factories, which deters counterfeiters. The electronic tag itself has a memory, which can store and modify data related to the product, which is conducive to the authentication. With this technique, without changing the current data management system, the unique product identification number can be completely compatible with the existing database system.

 

The technical application of RFID is a powerful black technology. Since 2000, it has been showing an upward trend. Data shows that2013 RFIDThe number of labels produced reached 330 billion yuan, which is more than 25 times the output of 1.3 billion in 2005. This shows that the application of RFID technology is in a period of rapid development. With the improvement of technology and the reduction of costs and prices, the potential for development is enormous and the prospects are very tempting.

 



 


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