I. What is industrial process control
Industrial control, including the control object sampling technology, and sampling post-processing technology, this technology is the current, pressure, flow rate, temperature, weight and so on some of the electrical signals, non-electrical signals, in short, all the signals organized into a computer system can accept the standard signal. These signal acquisition technology is derived from a series of sensor technology development and technical applications.
1, the characteristics of industrial process control system: process detection, transmission and control instruments, actuators and other components.
2, the controlled process is nonlinear, time-varying, time lag, uncertainty and other characteristics, it is difficult to obtain accurate mathematical model of the process, increasing the difficulty of transplantation control strategy.
3, the controlled process is mostly a slow process, with a certain time constant and time lag, control does not need to be completed in a very short time.
4, the diversity of the process control program, the same controlled process, due to different perturbations, the need to use different control schemes. The same control program can be applied to different production processes.
5, industrial production process control is commonly used form of fixed-value control, process control is to ensure that the controlled variable is stabilized at the required set value.
6, industrial production process control means of implementation of the diversity of computer control devices can be easily realized; can be convenient in the control room or on-site access to instrumentation information; can be directly calibrated and adjusted instrumentation.
II. main elements of industrial process control
Industrial process control to learn a lot of things, because it involves a large range, but the main learning is the principle of process control, automation instrumentation, database, the most important or programming, SQL, JAVA, MATLAB, VB, C++, etc. Industrial control: controllers, measurement transmitters, and later engaged in the industrial control industry is the main thing these things! To learn is the control valve (including electric, pneumatic), pressure, temperature sensors, flow meters and so on! Of course, the core of the industrial control is the controller: PLC must be!
III. What are the basics to be mastered in learning industrial process control
With the basic knowledge and skills in chemical engineering, mechanical engineering, control engineering and management engineering, they can be directly engaged in the design, research, development, manufacturing, technical management and teaching of process equipment and process computer automatic control in chemical industry, oil refining, pharmaceutical industry, light industry, environmental protection, etc., and they have strong adaptability to work related to electromechanics.
1, have a solid foundation in natural science, good foundation in humanities, arts and social sciences and the ability to express themselves correctly in the national language and writing.
2, a more systematic grasp of the broad technical and theoretical knowledge in this field, including mechanics, mechanics, electrical and electronic technology, thermal processing technology, automation, market economy and business management and other basic knowledge.
3, with this specialty necessary drawing, calculation, testing, literature search and basic process operation and other basic skills and strong computer and foreign language skills.
4,Possess the professional knowledge necessary for a specialized direction in the field of this specialty, and understand the scientific frontier and development trend.
5,Have strong self-learning ability, innovative consciousness and high comprehensive quality.
IV. Classification of computerized process control systems
1. Operation guidance control system
2. Direct Digital Control System (DDC)
3. Computerized Supervisory System (SCC)
4. Embedded system (EMS)
5.Internet of Things System (ITS)
6. Fieldbus Control System (FCS)
7.Fieldbus Control System (FCS)
V. Is it difficult to learn industrial process control systems
Learning industrial process control is still a little difficult:
Industrial production process control is the task of understanding, mastering the process and the static and dynamic characteristics of the production process on the basis of safety, economy and stability of the three requirements, the application of theory on the control system analysis and design, and finally the use of appropriate technical means to achieve. Mainly includes system program design, engineering design, engineering installation and instrumentation selection and tuning, and regulator parameter adjustment. This course takes single-loop control system as the main line, and explains the composition of single-loop control system and its four major components clearly: modeling method of controlled object, principle, type and selection method of detecting instruments, actuators and controllers, etc., and then introduces the design of single-loop control system, design of complex control system (cascade, feed-forward, large hysteresis process control and nonlinear gain compensation), and the process control system with special needs (ratio, feed-forward, large hysteresis process control and nonlinear gain compensation), and the realization of special requirements. Process control system to realize the special needs (ratio, uniformity, range, selection, decoupling control) The focus and difficulty of this course is the process control system program design and process design. Finally, it introduces the process control system analysis and design methods and steps of ship special auxiliary equipment, so that students can master the overall design steps and debugging methods of the actual production process control system, and stimulate students' interest in learning and solving engineering problems.
