1、 四层杂物电梯 PLC 控制 外文翻译 Abstract microelectronic technologys development, elevators dragging way and the control method has had the very big change, the exchange velocity modulation is the current elevator dragging main development direction. At present the lift control system mainly has three control m
2、odes: Following electric circuit control system (“early installment elevator many black-white control system), PLC control system, microcomputer control system. Because the black-white control system the failure rate is high, the reliability is bad, control mode not nimble as well as consumed power
3、big and so on shortcomings, at present has been eliminated gradually. Although the microcomputer control system has the strong function in the intelligent control aspect, but also has the interference rejection to be bad, the system design is complex, generally the servicemen master flaws with diffi
4、culty and so on its service technology. But PLC control system, because moves the reliability to be high, the use service is convenient, anti-jamming, the design and the debugging cycle is short and so on merits, time is taken seriously the people and so on merits, have become present use most contr
5、ol modes in the lift control system, at present also widely use in the tradition black-white control systems technological transformations. The origin and development of the elevator Elevator in the Chinese dictionary explanation: building electricity powered lift, instead of walking up and down the
6、 stairs. When it comes to lift from the origin of the 2600 BC Egyptians built in Pyramid using the original lifting system to start, but this kind of crane energy are human. By 1203, two French monastery installed a crane, the difference is just the machine is the use of donkey as power, load by aro
7、und a large drum rope for hoisting. This method has been used to modern until Watt invented the steam engine, in about1800, mine owners can use the crane to mine in coal transportation. For hundreds of years, people made various types of elevators, they all have a common defect: as long as the lifti
8、ng rope snaps, lifting ladder he rapidly hit bottom layer. 1854 Otis design a brake: in the lift platform mounted on top of a truck with a spring and a brake lever and Lift Wells Road on both sides of the guide rail is connected with the lifting rope, wagon springs, this is only the lifting platform
9、 weight is sufficient to pull spring, avoid contact with the brake lever. If the rope breaks, truck spring will pull the ends of vertical weakened, and the brake lever occlusal, can be firmly fixed without in situ platform continues to fall. Safe lifting ladder invention success! For a time, Otis ha
10、s become the center of attention. The first lift not Otis invented, but he was the first safe lift the inventor. Security this concept not only create lift industry, but also for those who want to build more tall buildings to add more available space design are open thoroughfare. However it can be c
11、alled the elevator ( electric energy to drive the elevator ) of the product should be at the beginning of the twentieth Century emerged. Elevator technology development trend (1): green environmental protection concept is the development trend of elevator. Have expert prophecy who first introduced g
12、reen products and market of race to control, who will grasp the market competition initiative. Development trend to basically have : the continuous improvement of product design, production of environmental protection type low power consumption, low noise, no leakage, no water leakage, no electromag
13、netic interference, no oil pollution of the elevator hoistway guide. Elevator traction with nylon synthetic fiber rope, steel belt without lubricating oil pollution traction mode. Elevator decoration will use no (little ) environmental pollution material. Elevator no-load rise and full of descending
14、 motor power regeneration recycling technology. The installation of lifts will be installed without scaffolding. Elevator parts in the production and use of the process has no effect on the environment ( such as brake pads must not use asbestos ) and materials can be recycled. (2) the application of
15、 Bluetooth technology in elevator. Installation of elevators knows line, on line is time-consuming, laborious, easy wrong job. If the control screen and calling system through the Bluetooth wireless call will be connected to the elevator control another revolution at the same time bring us enormous
16、benefits. A installation period will be reduced by more than 30%, the direct benefits of reduced installation costs, customers from booking to use lift cycle cost reduce the ladder and improve cash flow rate. B on the elevator using Bluetooth technology will make the elevator control system using a
17、large amount of the latest and fastest computer, which will further improve the elevator machine reliability, fault rate is greatly reduced, the control precision is further increased, the result is the elevator more comfortable, more accurate flat layer. C is a good solution to the elevator control
18、 and peripherals compatible and contact. In particular can take the elevator and escalator induction to the building management system or intelligent management district system. The definition of PLC Programmable controller is a digital electronic computers operating system, specifically designed fo
19、r applications in industrial environments designed. It adopts a kind of programmable memory, for its internal storage procedures, the implementation of logical, sequential control, timing, counting and arithmetic operations such as user-oriented instructions, and through digital or analog input / ou
20、tput control various types of machinery or production process. Programmable controller and related peripherals, according to the easy and industrial control systems into a whole, easy to expand its function principle design. In short, the programmable controller is a computer, it is designed for ind
21、ustrial applications and the design and manufacture of computer. It has a rich input / output interface, and has strong driving ability. But the programmable controller products are not directed to a specific industry application, in practical application, its hardware according to actual need optio
22、nal configuration, the software according to the control requirements for the design and preparation of. The characteristics of PLC: One, high reliability, strong anti-interference ability and high reliability is the key performance of electrical control equipment PLC due to the use of modern large-
23、scale integrated circuit technology, strict production process, the internal circuit adopts advanced anti interference technology, has very high reliability. Such as the Mitsubishi F series produced by PLC MTBF is high up to 300000 hours. Some use of redundant CPU PLC MTTF mean time to failure is lo
24、nger. From the PLC machine circuit, the use of PLC control system, and the same scale relay systems, electrical wiring and switch contacts have been reduced to hundreds or even thousands of fault, also reduced greatly. In addition, PLC with hardware fault self testing function, failure can be timely
25、 warning information. In the application software, applications can also be incorporated into the peripheral device fault diagnosis program in the system, except PLC circuit and equipment were also obtained self diagnosis of fault protection. Thus, the entire system with high reliability is also not
26、 surprising. Two, matching complete, perfect function Applicability of PLC development today, has formed a large, small scale, in various series of products. Can be used for various scale industrial control occasions. In addition to the logic processing function, modern PLC mostly with complete data
27、 operation ability, can be used for various digital control field. In recent years the function of PLC cells in large numbers, the PLC penetrated into the position control, temperature control, CNC and other kinds of industrial control. With PLC communication and enhance the ability of man-machine interface technology, using PLC composed of various control system has become very easy.
