College】 【weak bar code, RFID and EPC Analysis of the relationship between the】.

<br> bar code, RFID and EPC <BR> Analysis of the relationship between the introduction of mature types of bar code technology in logistics applications in the context of more and more popular, in the RFID (radio frequency tag) Automatic identification technology development, promising a .the sound of doubt and controversy, a number of IT and supply chain leaders also proposed EPC technology (electronic product code) and material concept of networking blueprint. .So, EPC and RFID in the end what is the relationship? .EPC will replace the bar code it? .These problems make the trade and logistics, information technology, user confusion and a loss in urgent need of a scientific and logical explanation of discrimination. .<BR> <BR> 1 bar code identification technology, RFID identification technology and its limitations and advantages of 1.1 yards limitations of bar code identification technology although in the present application is comprehensive, but also greatly improve the efficiency of logistics. .But there are still many shortcomings bar: (1) bar code can only identify a class of products, but can not identify a single product. . (2) bar code is a visual communication technologies. .That is, the scanner must "see" the barcode to read it, which show that people usually have to align the bar code scanner to be effective. . (3) If the bar code printed on the bar is torn, defaced or off, you can not scan these goods. . (4) the traditional one-dimensional bar code is an index code, to be real time and database links from the database to find a complete description of the data. .The limitations of the specific bar code are: ③ information identification information is static <BR> ③ recognition is the <BR> ③ contact information capacity is limited <BR> ③ can not give a unique identity for each consumer unit <BR> ③ .data storage, computing is centralized <BR> ③ two-dimensional bar codes only identify the capacityto solve the problem of information EAN.UCC bar code identification system, billing and inventory management in retail to play an important role, but there are several aspects of the supply chain .deficiencies: (1) did not do real "a matter of a code": the management of each product is not in place, can not achieve real-time tracking of products; (2) the cost of traditional EDI methods and techniques and other reasons, .not easy to promote, need to develop Internet-based EDI standards; (3) classification and attribute information is not; can not be used to classify information, statistics, applications, e-commerce application is limited. .In short, the bar code can only be applied in circulation (the flow of commerce and logistics information management), can not track and transparent process throughout the supply chain. .1.2 RFID Identification RFID technology and its superiority is essentially a means of identification items, which will eventually replace the current is considered a very wide range of traditional bar code applications, as articles identify the most effective way, it has some very obvious advantages .. .Function of bar code and RFID contrast, the size of the label information capacity, the number one read, reading distance, reading and writing updates (read-write tag information can be repeated R / W), ease of reading (reading speed and can speed .Move to read), adaptive (full penetrating read, can read in the harsh environment, work around the clock), etc. are much better than bar codes. .RFID technology has excellent features, to meet the current social and economic development of commodity processing efficiency requirements. .Radio frequency identification technology as a rapid, real-time, accurate collection and processing of information based on standardized high-tech and information, through the entity object (including retail, logistics units, containers, cargo packaging, production parts, etc.) the only valid identification, .is widely used in production, retail, logistics, transportation and other industries. .RFID technology has gradually become enterprises to improve the logistics supply chain management, reduce costs and achieve business management information and enhance their core competitiveness is not the lack of technical tools and means. .Compared with the bar code technology, radio frequency identification RFID (Radio Frequency Identification) is a new kind of automatic identification technology. .RFID systems use radio tags carry information between RFID tags and readers through the induction, radio waves or microwave energy for non-contact two-way communication, to achieve the purpose of automatic identification. .RFID technology is a commodity tracking the implementation of the logistics process a very effective technique. .Radio frequency identification technology is the most prominent feature: (1) can be non-contact reading distance can be from ten centimeters to tens of meters; (2) high-speed moving objects can be identified; (3) anti-poor environment; (4) strong confidentiality .; (5) can be recognized simultaneously recognize multiple objects. .<BR> <BR> 2 EPC concept and technology and its technical characteristics have generally recognized, uniquely identify the product is necessary for certain commodities. .The bar code recognition is one of the biggest drawbacks it can only identify a class of products, not the only commodity. .For example, the bar code on the milk cartons are the same everywhere, to tell which boxes of milk over the first period would be impossible. .How can we identify and track the supply chain every single product it? .With the rapid development of Internet and radio frequency technology to mature, digital information and global commercialization of products to promote a more modern program of identification and tracking R & D, supply chain can deliver unprecedented, nearly perfect solutions. .In other words, the company will be able toknow every product in their supply chain at any point in time the location information. .<BR> <BR> 2.1 EPC concept and technology generation While there are several ways to identify a single product to solve the problem, but now find the best solution is to give each product provide a unique number - "EPC code .. " .EPC code number used to represent a group of manufacturers and their products, unlike the EPC also used another set of numbers to uniquely identify a single product. .EPC is the only store in the RFID tag information in the microchip, so that RFID tags can be made to keep costs and maintain flexibility so numerous in the database with the EPC tag data can be dynamically linked. .<BR> <BR> EPC technology was developed by Massachusetts Institute of Technology Center for Automatic Identification (Auto-ID Center) developed Internet platform is designed to use radio frequency identification (RFID), wireless data communications technology, to construct a .real-time global information sharing items "Internet of Things (Internet of Things)". . ≪BR> <BR> 2003 11 1st, International Article Numbering Association (EAN-UCC) formally took over the promotion and application of EPC in the world of work, set up the Electronic Product Code Global Promotion Center (EPC Global), marking the formal .application to enter the EPC global stage. .Article Numbering Centre of China (ANCC) is the EPC Global in the country's only authorized representative. .<BR> EPC system is a highly advanced, integrated and complex systems. .The ultimate goal is for every single product to establish a global, open identity standards. .<BR> <BR> To solve the first problem, EAN and the UCC (now merged and renamed the business the world's first standards organization GS1) jointly launched the product tag (EPC) technology. .Product label is a new electronic radio frequency identification tags, each tag contains a unique electronic product code, all entities can provide the only valid object identifier. .It uses the computer to automatically position and status of goods management, and the information is fully used in the logistics process, the more control the flow of consumers from every business dynamics and circulation of goods, thus the supply of specific products .chain tracking. .Technical characteristics of EPC 2.2 EPC is a coding system, radio frequency identification technology and network technology as one of the emerging technologies, EPC system will lead to the promotion and application of logistics management process revolution. .EPC coding system is fully encoded with EAN-UCC system is compatible. .EPC tag chip area of less than 1 square millimeter, can achieve binary 96 (128) bytes of information storage, it identifies the maximum capacity is: 268 million global companies, each company produced 16 million kinds of products, production of 68 billion each .months. .Such a large capacity can be by the global annual production of cereal grains clearly marked. .This means that each product of each single product can be assigned a unique identity of electronic identification code. .Figuratively speaking, to them on the "Account." .Figure 2-1 is an area of only 150 square micron ultra-miniature electronic tag chip. .Compared with bar codes, EPC has an advantage not only in the super ID capability. .At the same time, EPC System RFID readers and video using wireless sensor between the way information exchange, it can be non-contact identification, "line of sight" As a result, can pass through water, paint, wood and even human recognition. .EPC1 seconds to identify the 50 - 150 items. .EPC application of the chip, which stores the information and information category is the bar code can not match. .EPC identifies the product in the future will be achieved when a single product level, if the manufacturer is willing, it can be the composition of goods, technology, production date, work teams, or even describe the operating environment. .EPC to the Internet as a platform to achieve real-time global information sharing items, which is the second bar code technology, the re-settlement changes in the retail, logistics and product tracking management of a new technology. .EPC RFID is in fact the Internet in order to achieve real-time global information sharing items, which will change again after following the bar code technology retail billing, distribution and product management of a new tracking technology. .2.3 EPC system components and things work a full EPC system consists of EPC tags, readers, Savant servers, Internet, ONS (Object Name Resolution Service) server, PML (Entity Markup Language) server, and a large number of database. .On the basis of the global Internet, EPC management software system by, ONS and PML global "physical interconnection." .Savant server's main task is data collation, reader coordination, data transmission, data storage and task management, it is the EPC of the central nervous system of work, play the role of management system platform. .Savant Systems ONS to the information specified in the server storage products, ONS has played a key role. .PML is a computer language description of the product information. .By the EPC tags, readers, Savant servers, Internet, ONS servers, PML server and database composed of many things in the EPC, EPC reader just read out a message to reference (pointer), this information through the network, spread ONS .server, find the corresponding IP address of EPC and get the address of the relevant items of information stored. .The Savant software systems using distributed processing and management of a series by the EPC reader to read the information, Savant will be passed on EPC ONS, ONS indicate Savant holds the product to a PML server for the file, the file is copied by Savant, which documents .product information can be transmitted in the supply chain. .Things structure of the network shown in Figure 2-2. .<BR> <BR> 3 RFID and the EPC and the relationship between the 3.1 EPC EAN.UCC System with the EAN.UCC relationship between the EPC Electronic Product Code is to improve the logistics supply chain management, reduce costs and recently developed a new .technology, can achieve the object of all entities (including retail, logistics units, containers, cargo packaging, etc.) the only valid identification, known as the revolutionary new technology, developed countries and regions by the world's attention. .Electronic Product Code EPC and currently the most successful commercial standard EAN-UCC Global Identification System is compatible, as EAN-UCC system is an important part of the EAN-UCC system is a continuation and expansion, mainly in the following two .areas: organization, by the International Article Numbering Association, EAN and the Uniform Code Council UCC EPC is responsible for the promotion and implementation in the world. .Technically, EPC structure and the existing GTIN is the EAN.UCC system compatible, which means that EPC coding structure GTIN is an important component. .Contact between the two different but overall, EAN-UCC system must maintain consistency and continuity. .The basic structure of EPC and GTIN into EPC coding structure shown in Figure 3-1 and 3-2, respectively. .Where: ★ header: identify the EPC's length, type, structure, version <BR> ★ EPC manager code: The following part of the entity responsible for managing <BR> ★ object classification codes: identify the object type <BR> ★ serial number: .identify a specific individual entity 3.2 EPC and RFID tags, RFID early relationship between the integrated circuit chip is made, are large, high cost, can only be applied to pallets, shelves and containers, and only a very small number of users, people .its prospects are not good. .The EPC uses a microchip to store information, and packaging technologywith a special park film, much smaller, as technology improved and extended applications, costs continue to decrease, it will give each individual consumer with a unique identity. .EPC system (of things) is a computer and Internet and radio frequency RFID technology on the basis of a unified identification system using the global coding object to each entity a unique code, and constructs a real-time global information sharing items "Internet of things .. " .It will become the bar-code technology, the re-settlement changes in the retail, logistics and product tracking management of a new technology. .EPC and RFID logic of science should be: EPC code + RFID + Internet = EPC system (of things), shown in Figure 3-3. .<BR> Thus, EPC system is a complex, comprehensive, integrated system, including RFID, EPC encoding, network, communication protocols, RFID is just one component. .EPC RFID technology is one of the areas, only certain low-cost EPC RFID tags are suitable systems. .4 Conclusion across from the bar code, RFID, EPC, and the relationship between them and EAN-UCC (GS1) the relationship between systems analysis, elaborated, we can see that logistics information technology identification and acquisition logistics management context and the resulting .change impact. .We may safely draw the following conclusions: (1) EPC is a bar code and RFID technology to expand and continue! .EPC is the EAN-UCC system, the continuation and expansion. .- EPC has become a Global Identification System (EAN-UCC System) is an integral part. . (2) EPC system is a complex, comprehensive, integrated system, including RFID, EPC encoding, network, communication protocols, RFID is just one component. .- Technical and updating of the evolution caused by the logistics model, EPC system (of things) in turn contain RFID technology. .- EPC RFID technology is one of the areas, only certain low-cost EPC RFID tags are suitable systems. . (3) EPC does not replace the bar code! .EPC willbe long-term coexistence with the bar code! .- EPC will work with bar code will work together to build the perfect supply chain management. .Under the strong market orientation, RFID technology, EPC and within the scope of things in the world will lead to a significant change, it will be the future of a new economic growth point. .In today's fierce market competition, rapid, accurate, real-time access to information and processing power will become a key competitive advantage. .Application of RFID technology into the information-based logistics management is particularly important. .I believe in the near future, EPC technology will be the same with the bar code technology deep into all aspects of modern logistics management, bringing the production, commercial distribution, and consumption - a new global supply chain revolution..