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1、四层杂物电梯 PLC控制 外文翻译Abstractmicroelectronic 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 modes
2、: 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 big
3、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 difficult
4、y 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 control m
5、odes 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 elevatorElevator in the Chinese dictionary explanation: building electricity powered lift, instead of walking up and down the stai
6、rs.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 around a
7、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 lifting rope
8、 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
9、 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 becom
10、e 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 th
11、e 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 green prod
12、ucts 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 electromagnetic int
13、erference, 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 motor po
14、wer 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 Bluetoot
15、h 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 benefits.
16、 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 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 i
