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1、基于plc的辊压机控制系统设计2（Design of roller press control system based on PLC 2）Design of roller press control system based on 2.txt PLCUndergraduate graduation opening reportTitle Design of roll press control system based on PLCStudent name Liu LinjieStudent number 200715020140Electromechanical class 07101Tu
2、tor Luo LieleiThesis (Design) based on the Charles compressor PLC control system designPurpose, significance and related research trends:Purpose:The comprehensive use of the knowledge, such as the analog electronic technology, digital electronic technology, electrical drive control, Microcomputer Pr
3、inciple and interface technology, computer principle design a greenhouse temperature control system. Using MSC 51 series single-chip microcomputer and sensors and other main control device and stepping motor to form an executive system, design and design greenhouse temperature system, so that greenh
4、ouse temperature control more convenient and practical.Technical index:1) the temperature is between 0100, the error is + 0.5 centigrade.2) the system can automatically adjust the temperature and keep the temperature constant, so as to achieve the goal.3) LED displays the greenhouse temperature, key
5、board input temperature.Significance：1) systematically review the knowledge we have learned and apply what we have learned.2) single chip microcomputer control the temperature of greenhouse, make greenhouse temperature control more intelligent, reduce the control system to personnel technical requir
6、ements, reduce the control cost, make greenhouse control system more easy to promote.3) learn the ability to think independently and solve problems and have the ability to do social research.4) learn how to look up documents and improve their ability to solve problems using data.5) to improve the ab
7、ility of reading and translation in foreign languages.6) improve the programming level and optimize the design level, the ability of computer graphics has also improved.Research trends:Roller press is a new type of energy saving grinding equipment which appeared in the middle of 80s. It is one of th
8、e intermediate equipments in cement grinding. The application of roller press in the production of cement industry can greatly reduce energy consumption, and increase the production of cement clinker grinding system. The roller press technology in China to introduce and popularize the application af
9、ter more than 20 years, so far, whether in equipment manufacturing technology or system technology have made considerable development, equipment manufacturing technology and continuous innovation to optimize the system brings strong vitality to this new technology, energy-saving rate of more than 30
10、%. The excellent technical and economic indexes have brought great economic benefits to the customers, but also gained broad prospects for development. To be optimistic, in the current energy shortage situation, this energy-saving effect remarkable grinding new technology has become the cement produ
11、ction enterprises grinding technology transformation and expansion projects main choice.After determining the structure and process of the roller press, how to carry out effective automatic control to make the whole grinding system run safely and efficiently, so as to achieve the purpose of energy s
12、aving and production enhancement,Has become a roller mill manufacturers and manufacturers face common problems. In the actual operation process, because the field of mechanical vibration, dust pollution, material particles, uneven process, control system and other reasons, resulting in a high failur
13、e rate of roller press, the key to solve these problems from signal detection and transmission control system and process system and roller press itself to reform.The PLC of roller press control system can not only in the harsh environment of the work and the signal detection and transmission effici
14、ently, so as to improve the efficiency of energy saving and can be further strengthened, especially in such global environment is more and more important role.With the continuous innovation and improvement of SIEMENS (German SIEMENS) PLC technology, users will be the direct beneficiaries. From techn
15、ological development, the current PLC has been affected by other control system of computer technology more and more challenges based on PLC technology, by itself the software need to be updated and the challenge of development, is a new industrial control structure have not only control network is
16、decentralized, and diversified challenges by open modular architecture the control system (OMAC) challenge. So PLC is bound to improve its software and hardware in two directions.In short, regardless of the products software or hardware, there are broad prospects for development.The main content of
17、the project (viewpoint) and innovation:To control the roller press system by using PLC, the control mainly includes: the main motor start stop control, dry oil lubrication control, speed reducer lubrication control, hydraulic system pressure unloading automatic control and signal display and alarm c
18、ontrol, weighing about distribution valve control gate valve and control system, feed gas. Among them, the automatic control of hydraulic pressure system is the core of the whole control system, and also the key to the effect of pressing cake.The main motor control adopts two control modes, automati
19、c and manual, which can be linked with the corresponding detection unit and automatically stop according to the fault signal. The main motor has overload protection ability, and when the overload reaches 110%, the extrusion roller will travel backwards. If the load falls below normal, the machine wi
20、ll stop automatically. When the bearing temperature is higher than 55 degrees, an alarm signal is sent out, and when the bearing temperature is higher than 60 DEG C, the main motor is automatically stopped. The gap between the ends of the roller can be displayed clearly in real time. When the gap ga
21、p between the ends of the roller is greater than 5mm, it is linked with the hydraulic system to correct the deviation automatically. When the gap of the roller exceeds the set limit (about 28mm), the main motor stops automatically and sends an alarm signal at the same time. Feed control using pneuma
22、tic gate valve, only the roller press operation, the valve is allowed to open. The discharge control adopts the left and right distributing valve, and the feed valve is opened to allow the roller press to run. Compared with the former roller press, manual manual control is safe and labor-saving, and
23、 the precision is greatly improved. After the hardware system is configured, some logic control processes need to be implemented by software control. The software adopts modular programming method.The structure design of roller press mainly includes: material design, roller design, roll mill frame d
24、esign, transmission system design and hydraulic system design, as well as reasonable choice of the motor.An outline of research methods, designs, or papers:Research methods:1) investigate and study the application of PLC roller press control system and collect relevant data.2) inspect the applicatio
25、n of PLC roller press control system on the spot.3) review and study the control method of PLC, and understand the application of PLC in roller press control system.4) study the working principle of the roller press.5) review sensor knowledge and its application in roller press control system.6) col
26、lect relevant literature and materials, and make a summary to get the best solution.Design scheme:1) according to the working principle of the roller press and the structure of the roller press, reasonable design is carried out.2) detection module design. The pressure sensor detects the cylinder pre
27、ssure; displacement sensor for the detection of roll gap; current transducer to measure the current of the main motor; thermal resistance test of two roll around the main motor bearing temperature, bearing temperature, main motor stator temperature and temperature reducer, and complete the detection
28、 of measured value is higher or lower than the set value.3) master module design. In view of the scale of the system using SIMATIC 37-300 series PLC, and is equipped with a touch screen, to display the working conditions and parameters, this series is the main control chip, PLC according to the sens
29、or input signal and the signal is set, and then make related action4) execution module design. Roller press hydraulic system.5) main component parameter design and correction, debugging.6) drawing through CAD.Thesis writing outline:1) design purpose, abstract, key words.2) overall design.3) hardware
30、 design.4) software design.5) references.Completion date and expected progress:1) topic: before December 15, 20072) issued a task book: before January 15, 20083) Title: early March 20084) mid-term examination: Mid and late 2008, 45) defense and performance evaluation: June 2, 2008 36) summary, archi
31、ving and recommend excellent graduation thesis: June 15, 2008Main reference material:1 Han Ruihua. PLC. Application in greenhouse temperature control system J. Journal of Kunming University of Science and Technology,.2004, 29 (2): 1141172 Gong Gong. Temperature control system of single chip microcom
32、puter J. electric times, 2002 (10): 66673 Xiao Xiao, Li Zhaohui, Hu Hui. PID temperature control system based on single chip microcomputer J. microcomputer information, 2001, 17 (11): 23244, Pan Xinmin. Microcomputer control technology M. Beijing: Peoples Posts and Telecommunications Press, 1988.228
33、 2315 Li Shuhua, Liu Chaoying, Dong Hui. Design and implementation of digital PID automatic temperature control system J. Journal of Inner Mongolia University (NATURAL SCIENCE EDITION), 1997, 28 (6): 8388416, Zhang Yigang. The principle and application of single chip microcomputer M. Beijing: Higher
34、 Education Press, 2005:362 3637 Peng Jiehua. Editor in chief. Curriculum guidance of electronic technology M. Beijing: Higher Education Press, 1996:253 2548, Zhang Junmo. Intermediate course of single chip microcomputer. Principle and application M. Beijing: Beihang University press, 2002:208 2119 S
35、ui C Dong, Wei Zeding and edited by the MCU application technology and examples of M.Beijing: Publishing House of electronics industry, 2005:9 1210 Lu Yinghua. Editor. Tutorial of electronic system design M. Beijing: National Defence Industry Press, 2005:163 17911, Y.Zheng, Y.Wu, &X.Ni.Resarch, on,
36、Automatic, Focusing, in, Real, TimeJ.Opto-Electronic, Engineering, 2004,31 (4): 64-6612, X.Zhao, &Y.Li.Application, For, Changing, Length, in, the, Process, of, Tracking, MeasurementJ.Joumal, of, Institute, of, Focal, Command, an, Technology, 2000,11 (2):Instructor comments: slightlyDate of yearThe title of the report summaryTime and placeSummary of minutesModerator: slightlyRecorder:Specific dateWorking group opinionslightlySignature of the person in charge:Specific date