四層雜物電梯plc控制外文翻譯-plc設(shè)計(已修改)
2025-06-01 14:53 本頁面
【正文】 四層雜物電梯 PLC 控制 外文翻譯 Abstract microelectronic technology39。s development, elevator39。s 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 modes: Following electric circuit control system (“early installment elevator many blackwhite control system), PLC control system, microputer control system. Because the blackwhite control system the failure rate is high, the reliability is bad, control mode not nimble as well as consumed power big and so on shortings, at present has been eliminated gradually. Although the microputer control system has the strong function in the intelligent control aspect, but also has the interference rejection to be bad, the system design is plex, generally the servicemen master flaws with difficulty and so on its service technology. But PLC control system, because moves the reliability to be high, the use service is convenient, antijamming, the design and the debugging cycle is short and so on merits, time is taken seriously the people and so on merits, have bee present use most control modes in the lift control system, at present also widely use in the tradition blackwhite control system39。s 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 stairs. When it es 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 around 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 mon defect: as long as the lifting 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 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 has bee 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 called 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
畢業(yè)設(shè)計相關(guān)推薦
鄂ICP備17016276號-1