集散控制系統外文翻譯(已修改)
2025-05-31 14:33 本頁面
【正文】 A typical DCS control system DCS (Distributed control system) is a microprocessorbased centralized onitoring of the production process, operation, management, centralized and decentralized control of distributed control system, called DCS. The system will be used in a number of units distributed process control puter, all information through the munication work by the host management puter monitor, to achieve optimal control, the device inherits the conventional instrument distributed control and the advantages of puter control to overe the normal function of a single instrument, Human Machine Contact poor and the single risk of microputer control system of a high concentration of defects, both achieved in the management, operation and display of three concentrate, but also realized in functionality, load and risk of spread in three areas. DCS system in the modern production process control plays an important role. Distributed control systems typically have the following four ponents: Field control level known as data acquisition devices, mainly the noncontrol variables during data acquisition and preprocessing, and further processing of realtime data for the CRT display and print operation station, in order to achieve openloop monitoring, and collected data to monitoring puter. Output device in a PC case, or can switch analog signals the way the puter output to the terminal device control mands. This is one level directly to the scene, the process is connected with the site. Such as valves, motors, sensors, transmitters, actuators and so on. They are the basis for industrial field device, it is also the basis of DCS. In the DCS system, this level of function is to obey the mands sent by the host puter, w hile upwardbit machine feedback implemented. Take for example the armed forces to the case, can be described as the bottom of the soldiers. They just follow orders accurately and precisely report the situation to higher authorities to plete the mission. As for its exchange with the host puter is through the analog signal or fieldbus digital signal. Because analog signals in the transmission process, there are some more or less distortion or interference, so by popular fieldbus for DCS signals. Process control level Also known as the basic field control unit or controller, is the core part of the DCS system. Relied on the regulation of production processes are achieved. Such as regulating the opening and closing valves, sequence control, continuous control and so on. Speaking of field control level is above the soldiers, then it is in mand of the process control level. It accepts signals ing from field control level, control law in accordance with the requirements of puting technology, and the results sent t
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