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I. Introduction
RFID (Radio Frequency IdentificatiON) is a non-contact automatic identification technology that uses radio frequency technology. The RFID system is basically composed of three parts: tag, reader and antenna. At the same time, it also needs the support of related hardware and software in practical applications. RFID brings us many benefits. Its advantage is that it can realize long-distance, multi-tag and even automatic identification in a fast-moving state in a contactless manner. The development of computer network technology, especially the development of Internet technology, has basically ensured the immediacy of global information transmission. On this basis, these two technologies are combined to be applied to the automatic tracking management of item identification and logistics supply chain.
Just like every machine has its own IP address, every product also has its own unique “IP address. On this basis, the Internet of Things is built. When the idea of the Internet of Things becomes a reality, everything in the world will become a reality.” Whenever and wherever they can connect with each other and “exchange with each other”, the whole world will be renewed. It will be more extensive than the Internet. What the Internet does is the connection between computers and RFID is the connection between goods and computers.
2. Analysis of blood management business
After blood donor registration and physical examination, RFID tags are attached to each bag of qualified blood. Since then, blood tracking starts, regardless of whether the blood is transferred in or transferred from other blood banks, or used by hospitals. Followed by the unique identification RFID tag.
3. Application of RFID in blood management
The combination of radio frequency identification technology and computer network technology gave birth to the EPC system. The information network architecture of the EPC system is based on the global Internet, through the SAVANT management software system, object naming resolution service (ONS) and entity markup language (PML) Realize the global “physical interconnection.”
Combined with the idea of EPC system information network architecture, we propose a distributed RFID information network architecture. Distributed management is different from traditional centralized management. Distributed is the best way to solve the problem of large amount of information, strong redundancy, and high security. The distributed RFID information network architecture mainly realizes information management and information tracking management. It mainly includes middleware, root object name resolution service (RootONS), local object name resolution service (LocalONS) and information system. The middleware provides a series of calculation functions on behalf of the application program. Before transmitting the data to the information system, the RFID tag data must be filtered, totaled and counted. RFID tag application system middleware uses standard protocols and interfaces to provide effective and standard data for the upper-level information system. It is the link between the reader and the information system. RootONS service is a root directory service, similar to domain name resolution service DNS, through the RFID tag provided by the middleware, can specify the LocalONS address where the product-related information is stored, and then smoothly extend to each server. The LocalONS service is a chain directory service. It can specify the source address of the entire chain storage product through the RFID tag provided by the middleware. At the same time, it also records the information of the entire chain related enterprises. The main function of the information system is to receive the RFID tags provided by the middleware, and to provide the server with effective data for storage, which can be adjusted according to different industries and different businesses. In order to ensure that product information can be queried normally when the product information chain is broken, this network architecture also proposes a real-time backup mechanism for the entire information chain. When a point is broken and product information cannot be tracked normally, the backup information chain mechanism is activated.
Features of distributed RFID information network architecture:
1) Open-loop system architecture, the entire architecture can run in open-loop on the Internet;
2) Universal standard architecture, the entire architecture is universal and applicable to various industries;
3) Distributed management structure to solve the problem of excessive information;
4) High interoperability and information sharing.
The workflow of RFID in the blood management system: This application platform is designed based on the information network architecture theory of RFID technology, and the blood management system is used as a demonstration of the information network architecture. The purpose is to track blood information at blood collection points, blood bank transfer points, and blood use points . After blood collection, each bag of blood is affixed with an RFID tag. This tag contains an RFID code to uniquely identify the blood. The detailed information of the blood can be queried through this RFID code. The staff passes each bag of blood through a reader equipped with an antenna, the RFID code contained in the RFID tag is automatically read through the processing of the middleware, and then the information of the collected blood is stored in the database, and the RFID is stored at the same time. Register the code and blood bank address in LocalONS, and register the LocalONS and RFID code in the National Blood Information Center RootONS. The database of each blood bank must record the address of the source blood bank and the address of the outgoing blood bank. The RFID code read through the reader first finds LocalONS in the National Information Center RootONS, finds the registered IP address in LocalONS, finds the IP address and obtains the relevant blood information stored in the address, and then records it in the blood bank Find the information of other addresses in the order of the blood outgoing address, and so on, until the found address does not record the blood outgoing address. At this time, it proves that the blood has been used or reported damage, and then find all the information of the blood user. This blood information tracking is complete. At present, the blood management system is used as a demonstration, and a simple prototype system has been prepared. The system uses C#.NET as the development platform and the database uses SQL Server. This prototype system has a total of 5 points, namely RootONS service, LocalONS service, blood collection point, transfer point blood bank, and point of use hospital. The 5 points are respectively set on 5 machines. The RootONS service is equivalent to a directory service. According to the company code in the RFID tag, the localONS service corresponding to the company can be found in the RootONS service, and the registration information of the company will also be recorded. The LocalONS service mainly records the address of the blood collection point from the source of the information flow. It also records the information of the entire tracking chain enterprise. The blood collection point mainly records the time when the blood enters the blood bank, the time when the blood is collected, and the information of the blood donor. The transfer point blood bank mainly records the time when the blood enters the blood bank and the address and time of the blood bank, and the point of use. The hospital mainly records the time when the blood enters the hospital, the user’s information, and the time when the blood is used. At present, the function of querying and tracking blood information on the local area network has been realized. After a correct blood TagCode is given, the information of the bag of blood mobilization will be tracked out according to the system design concept.
The benefits of RFID technology in blood management:
1) Non-contact identification technology to reduce blood pollution;
2) Set the effective date of the blood, and the scrap alarm can be automatically realized in the inventory;
3) Multi-label identification to improve work efficiency;
4) Realize real-time tracking of blood information.
Four, concluding remarks
This paper takes the distributed RFID information network architecture as the theory and the application of RFID technology in blood management as a demonstration to realize the interaction and processing of information. The application of RFID is not only limited to blood management. As a means of combining real-world object identification and information dissemination, it will play an important role in all aspects of society, such as logistics management, industrial production control, personal identification, and activity goals. Monitoring and so on. It can be applied to other industries to form RFID application solutions for other industries only by making slight adjustments in accordance with the characteristics of the industry.
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