What is industrial automation? If it is a common understanding, the so-called industrial automation refers to the production process in all aspects, through the introduction of a variety of mechanical equipment should be liberated from the traditional labor force, and more importantly, can also be faster and better to complete the production task, so the whole process is also known as industrial automation construction. Combined with the current point of view, in the petroleum, chemical, automobile manufacturing, military and other industries, the improvement of production efficiency can not be separated from the automation level of control technology. So today here, small on the development of industrial automation control status quo and how the future trend?
Industrial automation control development status
Industrial automation, including industrial automation system, hardware and software 3 parts, is a kind of instrumentation, control theory and computer technology, according to the requirements of industrial production to complete the established operation, so as to achieve the purpose of increasing production, reduce consumption, improve quality and so on comprehensive technology.
Relying on the development of electronics and communications industry, contemporary industrial automation control is mainly based on microcomputer control. At present, the typical control by the host computer, industrial controllers, field actuators composed of three-layer structure. Automation control system to programmable controllers, distributed control systems, industrial PCs, as well as embedded computers including PID regulators and controllers with OEM products.
First, programmable controller technology is based on computer technology as a new type of industrial control device, is a kind of digital arithmetic operations designed for industrial environments and electronic systems. Because programmable controllers can perform arithmetic operations, sequential control, counting and timing, as well as logical operations, and can effectively control all the processing of products and machinery production, so in industrial automation control has long dominated the market.
Second, the distributed control system based on the basic communication network, by the multi-level computer system, including process monitoring level and control level, etc. The DCS integrates a variety of high and new technologies, including modern communication technology, control technology, display technology and computer technology, it is a product of multi-fusion technology.
Third, with the rise of information technology innovation, industrial PC integration of fieldbus and control network technology, modern network control technology and advanced equipment and display technology came into being, in line with modern science and technology in the development of information, digital, intelligent trend of industrial PC since the early 1990s into the military industrial automation, rapid entry into the field of commercial and civilian, and gained a wider range of applications.
PLC to integration, network development
Integrated controller (OCS) proposed, so that the PLC integration route is gradually clear. OCS by the PLC development but not simply PLC, it will be the traditional PLC and HMI, I / O and the rapid development of the network combined into one, increased human-computer interaction interface to facilitate the control of industrial automation operations. Which PLC control program and HMI programming process are used by the programming platform developed by HORNER, convenient and fast operation makes it favored by users, the trend of PLC integration has become more obvious. In addition, the innovation and development of Internet technology, triggering changes in the process control field, that is, the expansion of Ethernet technology, PLC development also rely on the Internet development tends to network. High-speed transmission of data in the communication system and control terminal network function of the integration of the degree of improvement, PLC will continue to develop in the direction of networking.
The development of new fieldbus control system
Under the impetus of new technologies, the computer control system has experienced the base type pneumatic instrumentation control system, electric unit combined analog instrumentation control system, centralized digital control system and centralized distribution control system (DCS) several important stages, is now towards the field bus control system (FCS) direction to expand and extend the FCS in the future, the vitality will be more and more powerful, the reason is that the FCS combined with the DCS, industrial Ethernet, industrial control network and the field bus control system (FCS), the FCS will continue to develop in the direction of the network. The reason for this is that FCS combines new technologies such as DCS, industrial Ethernet, and advanced control. Industrial Ethernet and fieldbus technology can provide a reliable, flexible, convenient and fast data transmission methods, which makes FCS in the industrial field will be more widely used, the new fieldbus control system in the control field will continue to grow and occupy a more important market position.
Development of Intelligent Control
The proposal of intelligence has led to changes in various fields, it is the application of information technology, which adopts artificial intelligence theory, learning algorithms, and advanced technology, so that the equipment can simulate certain characteristics and functions of human intelligence. Industrial intelligent control is a control method proposed on the basis of artificial intelligence, which is mainly manifested in the multifunctionalization of automatic control of mechanical equipment. The open distributed intelligent system is realized through Ethernet and Web technologies. Based on the network common TCP/IP four-layer protocol family, it provides highly modular, distributed technology and reusable industrial control solutions. For example, the new generation of solid-state sensors and intelligent transmitters are developed in the direction of miniaturization, high-precision, low-function, and intelligence. Intelligent valve positioners are controlled by highly integrated microcontrollers, which can be grouped for all control parameters, and realize the characteristic correction functions such as linear, split-range control, equal-percentage, and fast-open, etc., as well as the realization of intelligence. The embedding of the network makes the realization of intelligentization an inevitable trend.