续上毕设中英文翻译.docx

1、续上毕设中英文翻译河北联合大学轻工学院Qinggong College,Hebei United University中 英 文 翻 译（汉译英）通用单片机工业控制板系统设计学 号： 200715280204 班 级： 07拓展（1）班 姓 名： 温建成 指导教师： 杨志刚 2011年 6 月 15 日目 录2原文 111.1系统背景 111.2 系统概述 122工控板系统的设计构想与方案论证 122.1设计构想 122.2方案论证 132.3 RS485串行通信 141.汉译英1. Introduction 1.1 Background System To look at a variety

2、 of industrial field, there is little place can not see industrial automation and control equipment. In these devices, often a large number of PLC, from a programming point of view, these should be completed by the PLCs function is very simple, if we use SCM to achieve its function, it is easy. If i

3、t must be a clear description of the case, so to speak: a few dozen bytes may be as long as the procedures of those can be done by the PLC to complete the function. If you understand this machine work processes or you are such a machine operators, some Luedong SCM, then the process can write out. Ho

4、wever, there did not use SCM, but with the PLC, why? Reliability is the key! The harsh requirements of the industrial site, not a beginner, is an experienced developer, are often also feel that headache. One piece of equipment or hundreds of thousands more expensive, of course, the designers do not

5、want to take a risk to use SCM control panel, but would prefer to use some of your PLC. After all, but the PLC is expensive, if grasped by the control board to replace SCM, will surely market, the key is you have a grasp. SCM is the industrial control panel for such applications tailor-made. We foun

6、d in our work, it is very difficult industry at the scene found the sight of domestic SCM equipment, in particular control of part of the intervention, almost all foreign products unify the world. We are doing things in the process, but also Suantiankula have tasted all kinds of flavors, Mopagunda,

7、emerge wounds, after a period of exploration, and gradually master a number of laws, in resolving the serious industrial disturbance at the scene, SCM system Not credible on the issue has some experience, some products made, the system can reliably operating in various industrial applications at the

8、 scene. We believe that to be able to do a good job in industrial products, the key is to understand the control of the object, count on what technology can solve all the problems once and for all is unrealistic, but also to the development of premature signs. For example, if you design a re-measure

9、ment equipment, then you must know in advance of this equipment is the measurement of how much, how high accuracy, continuous measurement of speed, etc. What are the requirements, if done before the equipment Thinking is: the bigger the better range, the higher the better accuracy, speed the sooner

10、the better. So you can say that this instrument will certainly do so in vain! In addition to award you Nata useful, there will be no practical value, there will be no commercial value. This is not difficult to understand, and similarly, the anti-interference industrial processing, too, if you say: T

11、he more the better anti-interference capabilities, what kind of anti-interference can best. That means you have to control the target will soon face the source of interference also recognized inadequate, it is hard to do a good job, or to pay a great price. However, it encountered on the source of i

12、nterference have a full understanding, is easier said than done! Not seen or touched this thing, it is difficult to grasp, as for various newspapers, magazines and even professional books that are also short unknown, and talk about generalities, not related to in-depth reasons, proposed by the measu

13、res taken are often difficult to Effective implementation. For example, many of the requirements of power on a certain good, but how a good law? That are not available, or require the use of the so-called clean power supply, is unrealistic. An instrument to sell a total of 200 to 300 yuan, as it has

14、 to with a clean power source, a top-heavy. Also, Indian board design is very important, we must design, but how to be good, but not more talk, just listed some attention to matters, when the note was not completely satisfied, what is requested by choice, not to Erzhi. Of course, whether these desig

15、n principles can read each and also the basis of relevant knowledge and experience on each.In our work, we have a number of laws that can help fans to enter this field, to that end, we use platform of the concept, and we have the expertise, we built a small platform, A hardware platform, a hardware

16、platform for anti-interference capabilities clearance. With this platform, enthusiasts can give full play to your intelligence and wisdom, it is applied to your work, for your service. We believe that the microcontroller used in industrial equipment control of the conditions are ripe for such a spec

17、ific number of performance: (1). SCM increasingly mature development tools At present, the price of notebook computers has become more civilians, and second-hand laptop computers at lower prices, therefore, will be taken to the notebook computer industry is no longer wishful thinking at the scene. O

18、utstanding Keil SCM software development such as the emergence of making the + to write software simulation-verification as an important development mode. (2). SCM also features the new site for industrial applications has created conditions At present, the MCU varieties growing, the new SCM joined

19、the many new features, such as internal RAM, Flash Rom, such as the increase for the widespread use of high-level language created the conditions for almost all ISP (online programming) The function, for a software simulation + write-verify development mode, a download cable to resolve the problem u

20、sing SST MCU board can be realized in the simulation. (3). Constantly improve the quality of frontline workers Many workers in the frontline staff, secondary, tertiary and even college-level education, computer operators not be a problem, some schools in the school in the 1-2 senior language, or eve

21、n a C-language schooling, therefore, in the preliminary master SCM Knowledge, learning C programming language is not an obstacle. (4). The popularity of real-time operating system also makes it easier for the development of SCM In recent years, real-time operating system (RTOS) gradually popularity,

22、 coupled with the decline in prices of SCM hardware, operating system using the programming is no longer dream. As the operating system from computer experts to prepare and verify the market, so its performance is fully guaranteed, and the help of the operating system programming, allows more proced

23、ures to write, and can be more reliable. SCM imitation PLC industrial control panels are cheap, easy to use, stability Buxun dedicated PLC, is a small automatic control of optimization controller. In this paper, designed by SCM industrial control panel has the following advantages: (1). Positioning

24、accuracy of targeting industrial control, go to people in need, those who do not have to do not need this money for lovers choice. (2). After the test of practice is not only used by the practice of mature technologies, and is targeting the practice of promising industries, it is important; (3).s De

25、velopment is the simple switch of control, do not involve analog, not to complex measurement, display technology, only available as a module of choice for users limit the scope of application. Switching control of the programming is relatively simple, but its scope is extremely broad, if one can do

26、this, we can find a stage play to their abilities.1.2 System Overview This design from the use of the main ideological and distributed by a stage crew (PC micro-computers), the next crew (SCM) of industrial control panel system. The system uses RS-232 serial communication standards, through the host

27、 computer (PC) under the control of crew (SCM) on-site industrial control. The crew is using the SCM industrial control panel system. The anti-jamming systems and good design flexible, convenient and suitable for the poor environment for industrial control. The system can be applied to all within 20

28、 points of the control system can control the cylinder, solenoid valves, relays, stepper motor, an external optical, capacitive, inductive, and other sensor-Hall ; Can be used to replace 20:00 within the PLC for control of various occasions (such as machine control). 2 Control Board system design co

29、ncept and feasibility studies programme 2.1 The design concept According to SCM industrial control panel system design requirements, sorted out the main elements of system design. AT89C51 programme adopted eight MCU. SCM software programming degree of freedom, can be programmed to achieve a variety

30、of arithmetic algorithms and logic control. And small, simple hardware, ease of installation. Can separate control, but also and PC communications. Distributed from the use of the main ideas, from the stage crew (PC micro-computers), the next crew (SCM), industrial control, industrial control panel

31、composed of the entire system , And remote control. In addition SCM Control Board in the industrial control and have a wide range of applications, programming and peripheral functions with the use of the circuit are very mature. This design needs of content: (1) the input system input types: analog,

32、 digital input the number: (units, or Road) a. Enter the number of b. input more than the relationship between the single-ended input differential input (2) system output output types, according to the back-end connectivity equipment input type a. analog type: voltage output current output b. the number of types: DC output, dry contact relay output, NPN open-collector (mainly Japanese products), PNP collector Open (mainly European and American products). (3) network communications communication bus type: communication RS232 interfaces, 485, CAN