In recent years, the information level of China's manufacturing enterprises has been greatly developed. During the period when the production process is automated and computerized to fully cover all kinds of production and operation links of the enterprise, key enterprises in some industries can realize R&D, design, manufacturing, and enterprise management. , The integrated application of information in all aspects of marketing, and is promoting the optimization of the production process and the level of collaborative management of industrial enterprises. According to the survey data provided by the Institute of Science and Technology Information of the Ministry of Industry Information, the raw material industries such as steel, nonferrous metals, building materials, petrochemicals, etc. The proportion of production lines of automation control systems in large and medium-sized enterprises has reached over 85%. Enterprises have generally established production process control systems to automatically collect production process data and improve the level of process management and control.
1. The development of MES intelligent manufacturing
In the mid-1980s, the American Advanced Manufacturing Research Institute (AMR) first proposed the concept of MES and clearly pointed out that MES is a management information system oriented to the shop floor between the upper-level planning management system and the bottom-level industrial control. It provides operators and management personnel with plan execution, tracking, and current status information of all resources (people, equipment, materials, customer needs, etc.). At present, the application of MES in developed countries such as Europe and the United States is in a stage of vigorous development. The scope of companies implementing MES projects in my country is becoming wider and wider. At present, the oil refining industry, chemical industry, pharmaceutical industry, food industry, chemical fiber textile industry, MES systemMES systemMechanics manufacturing industry, automobile manufacturing industry, aviation industry, shipbuilding industry, semiconductor manufacturing industry, metallurgy industry, aluminum smelting industry and other industries have all applied MES system /a>Management mode. Especially in the fields of oil, natural gas, petrochemical industry, process control is very necessary. The expansion of functions is becoming more and more abundant. For the collection, processing and display of information at the bottom of the factory, the MES system will respond to market needs with the fastest speed and low cost, by integrating the data of each unit, processing information, statistical management business, production statistics and cost accounting for the enterprise Provide data support to help enterprises' energy saving and consumption reduction practices. Many colleges and universities and scientific research institutes in my country are engaged in research and application development in this area. In terms of theoretical research, some advanced ideas such as parallelism, agility, networking, and reconfigurability have been added; in terms of system design, Using object-oriented, component, agent and other technologies, many beneficial results have been achieved.
With the increasing maturity of MES products, the development of MES system construction by foreign petrochemical companies and the intensification of market competition, domestic petrochemical companies have gradually invested in the construction of MES systems to achieve production process optimization, energy saving and consumption reduction goals. .
2. Business requirements
Provide guidance, coordination, supervision, and service to the production activities of enterprises to promote "safe, stable, long, full, and excellent" production operations, and promote the progress and upgrading of production technology, improve production technology and economic indicators, and provide domestic and international The advanced level is on par. The specific production and operation business requirements involved are to improve the overall management of production and operation capabilities, and enhance the ability to obtain the actual production data of the manufacturing enterprise in a timely manner; coordinate and ensure the safety and stable production of the enterprise, strengthen the role of production command, and fully understand the existence of enterprise production and equipment Improve the ability to respond to abnormal production situations, realize the integration of production batch information and the traceability of product quality problems; establish an efficient and accurate assessment mechanism for enterprise production operations; realize timely acquisition and maintenance of equipment operation, fault, and maintenance data Analyze ability; establish equipment reliability management mechanism based on condition monitoring and inspection; establish efficient and accurate enterprise production operation and equipment operation assessment. For special business needs, we track the progress of factory start-up preparations such as new construction, expansion, technical transformation, inspection and maintenance, realize the management of the start-up plan, and manage the production preparation conditions before the start of the company; timely and accurately understand the company's production and operation data, including raw material import Factory, production, inventory, product delivery, energy saving, environmental protection, start and shutdown information; timely coordinate and deal with all kinds of unplanned shutdowns, equipment repairs, overhauls and other emergencies that affect production; achieve comparative analysis of main economic and technical indicators ; Combined with equipment reliability management based on condition monitoring and maintenance (CBM), through the analysis and judgment of failures, assisting in the formulation of maintenance strategies, realizing the monitoring of equipment operation, maintenance and overhaul process management, and ensuring the smooth operation of equipment. Informatization needs to collect production data directly from the key equipment of manufacturing enterprises, integrate on-site industrial monitoring video, and enhance the ability to grasp the real production situation of the factory in real time and accurately; the production data, inventory data, and incoming and outgoing data of manufacturing enterprises are automatically reported level by level. , Summarize and check to reduce the influence of human adjustment factors; collect the key unit, machine pump condition monitoring operation data and equipment corrosion monitoring data of the manufacturing enterprise, realize the summary, analysis, diagnosis and alarm of the equipment collection data; establish a technical service platform to realize the factory Centralized monitoring and technical support of major information systems.
3. Data source
Real-time data passes through the DCSPLC control system of the distributed control system in the field of production process automation within the production dedicated network, as well as the DCS interface that has been upgraded to the OPC server. The real-time data system is an integrated platform for applications and data. It has excellent performance and can meet the needs of enterprises. The real-time data needed now and in the future will provide a unified data platform for more applications. Based on a unified enterprise model, it will provide a simple and configurable development environment for customized applications. The current implementation data system has a unified data collection infrastructure and a productized interface (RDI) that connects to real-time databases of multiple systems. Through these productized RDI interfaces, real-time data in the production process is collected, and through the implementation experience of the previous production enterprise MES In summary, it is found that because MES directly collects data from the DCS system and laboratory equipment in the production control layer, the data collection frequency reaches the minute level, so the system data information has high effectiveness. Secondly, the users of MES not only cover the production management level of the enterprise, but also the production operation layer of the enterprise. All the operators in the production workshop are the end users of the MES, so it has the characteristics of a large number of users and a large amount of data access. In addition, the production of enterprises has extremely high requirements for safety and stability, so the MES system must have good stability and uninterruptibility. Provide a management platform based on Web access, provide flexible and intuitive data analysis and graphic display.
4. Data analysis
Enterprise data is the resource of an enterprise. Good enterprise data has a positive meaning for data integration, application system integration and expansion. MES application supporting software provides visual tools such as real-time monitoring, data reports, trend analysis, etc., using B/ The combination of S and C/S is convenient for enterprise users. For example, the system supports WEB page editing of real-time/historical data, from Client module to Web browsing to Office embedding, which truly realizes what you see is what you get.
5. Data storage, sharing, integration
With the rapid popularization of the Internet, both telecom operators, major banks, insurance companies, petroleum, chemical, coal and other fields have spent huge amounts of money to establish their own enterprise-level data warehouses, with complete database management functions and data For example, a relational database management system (OracleDatabase) of Oracle Corporation of the United States is a product with a high status in the database field, and it solves the problem to a certain extent for large enterprises. The problem of data sharing and intercommunication between applications, and to provide enterprises with data decision support. In recent years, major companies have divided data into different sources, different processing methods, and data of different quality to be logically or physically concentrated, so as to provide enterprises with comprehensive data sharing. In the field of enterprise data integration, it is already very important. Mature framework mode.
Big data is becoming an important feature of the transition from an industrial economy to a knowledge economy, and it has become the most critical production factor and product form in the new era, enabling people to use all kinds of data to create new opportunities and challenges.