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In the process of establishing and continuously improving the quality system of home appliance manufacturers, the product production line is required to have a set of clear, complete, easy-to-access and retrieve quality records. The current bar code-based production management system enables various quality analysis and control to be easily realized. The traditional bar code system has its advantages, but also has obvious disadvantages, such as easy contamination, breakage, and the need to stop waiting for scanning one by one. The batch reading efficiency is not high, and it cannot meet the needs of fast and accurate.
Give full play to the technical advantages of RFID and adopt RFID technology on the washing machine production line. It is not a completely new set of RFID-based production management system, but the integration of RFID information with the existing bar code-based production management system to organically apply RFID. Incorporated into the overall structure of enterprise informatization.
Use RFID, barcode, and sensors to collect real-time data on the production line, and transmit the read data to the upper equipment (controller, computer) through the network (wired or wireless). To manage loose sensors requires a new management mechanism that can automatically discover and organize the network, deploy RFID readers, and establish a reader network connection to solve the problems of planning, optimization and control of the reader network. The RFID tag on the item, in conjunction with the RFID reader connected to the network, each identification means the tracking of the item.
Not only that, the RFID system can also provide a variety of applications and services, including: production line status monitoring, employee behavior monitoring, production management, quality management and tracking, material management, job scheduling, on-site operation guidance, and real-time uploading of production data.
Enterprise-level RFID application architecture
As an enterprise-level application, the RFID application architecture has the following characteristics:
■ Generally, UDDI is not used, and the URL of the service can be directly specified.
■ The product code can be determined by itself according to business needs.
■ More consideration is the combination of RFID and business systems, such as ERP, SCM, CRM and other systems.
The distributed architecture shown in Figure 2 is adopted.
The entire network architecture must provide the function of information tracking. According to the identification code of the product, all the information of the product and the information of each flow point can be listed. In order to ensure that the tracking information is complete and the information chain can be queried in real time, the information chain backup function is provided, so that the tracking information can be found even if there is a little interruption.
useSOA(Service Oriented Architecture) framework to design and build RFID application architecture platform, make the platform easier to expand, and enhance the interoperability of the platform to various different application systems. The information service mechanism established on this basis can provide information integration services for cross-regional, transnational, and distributed applications.In the SOA-based RFID application architecture, as an independent network node, an enterprise or enterprise department “exposes” its shareable business processing and information through the Web Service interface. Other nodes on the network transfer related information by calling the Web Service interface. Integration of business and information into its own business system anddatabaseIn the system.
Web Services is most suitable for the development of cross-platform and cross-network communication (because the use of the http protocol is allowed by the firewall). It can cross a heterogeneous structure and contact customers, suppliers, business partners and internal information systems of the company. It is electronic The best solution for the integration of business B2B and corporate information. Only by formulating dynamic business processes according to business needs can specific and changeable business service problems be solved. The main purpose of applying Web Services technology to the RFID system within the enterprise is to process information at the edge of the enterprise network in a timely manner and to maximize the data processing capabilities of the RFID system.
The RFID application system includes RFID application server, RFID data server, RFID computer, RFID reading and writing equipment, etc. The electronic label is associated with the home appliances in the production line. As the home appliance production process proceeds, the data in the electronic label is updated at any time. The home appliance production line as shown in picture 2.
The function of each module of the system
The functional modules of the RFID application system are shown in Figure 3.
Some modules of data collection
■ Manual data collection: Provide a means of direct manual intervention.
■ Electronic tag reading and writing dataMiddleware: Mainly responsible for the read and write operations of electronic label data to ensure the correctness and integrity of the data.
■ Electronic label data-driven software: Mainly responsible for the collection, sorting and sorting of RFID data.
Some modules of data processing software
■ System exception handling: It mainly deals with the abnormal situations that may occur in the operation of the RFID system, such as abnormal reading and writing of RFID equipment, errors in data reading and writing, etc.
■ Information integration platform: The RFID information integration platform is responsible for the internal information interaction of the workshop, the information interaction between the workshop and the information interaction between the enterprise and the service registration center, so that RFID information can be applied within the scope of the enterprise.
■ RFID coding system: According to the home appliance production system, a suitable RFID application article coding system is given.
Some modules used by data
■ Online setting software: The online setting function is used to complete the preparation work of the system before starting operation, mainly including the station (station) setting. It is based on the basic process information and needs the support of “system maintenance” information. The main function is to arrange the workbench. The user of the online setting function is mainly the administrator of the production line. He makes the above settings according to the released production plan and prepares for online. After it is ready, the system enters the standby state, waiting for the material to be officially launched.
■ Operation scheduling: The operation scheduling function is the core of the correct and efficient operation of the system. The operation scheduling function mainly includes the following functions: control of material movement, priority scheduling, production synchronization, etc. The operation control function is the background function of the system, and there is no specific user type.
■ Production monitoring: The production monitoring function is provided to general users, enterprise managers, leaders, etc., to understand the production progress in time. It mainly includes real-time monitoring of order execution, real-time monitoring of process production, and real-time monitoring of station (set) production. These real-time monitoring functions provide users with overall or partial production execution information, so that users can adjust production in time according to actual conditions.
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