集散控制系統(tǒng)外文翻譯-預(yù)覽頁(yè)
【正文】 he work by the work munications system formed. You can put him into the phenomenon of Inter. Based on production needs, you can join at any time or removed workstations. System configuration is very flexible. 2, operation and management easy. DCS through humanmachine feedback CRT with keyboard, mouse, etc. to achieve. You can imagine the same as surfing the Inter, you can monitor the production device and the whole plant operation. 3, the control featurerich. The original analog control loop with the plex operations realized by the microprocessor to achieve high accuracy. Is there any method to achieve CPU can not it? ! 4, information resource sharing. You can imagine the station each site on the Inter, as long as you are in the DCS system, and permission is large enough, you can understand that any parameters you want. 5, installation and debugging. Compared to the original analog control system, so many flying thread, a lot of hair like wires. DCS system be very convenient. DCS system hardware structure DCS hardware system mainly from centralized operations management device, distributed process control devices and munications interface devices and other ponents. Through the munication work will connect these hardware devices, and mon data acquisition, distributed control and centralized monitoring, operation and management. Field control station The main equipment in the field control station is the site control unit. DCSsite control unit type of information directly with the production process IO interactive processing system, its main task is to carry out data acquisition and processing, the implementation of the controlled object closedloop feedback control, sequence control and batch control. Users according to different application requirements, choose to configure a different site constitutes a site controller control unit. It is a process for continuous production control, supplemented by logic control in order to form a plex control scheme can achieve a variety of field control station。 DCS 系統(tǒng)在現(xiàn)代化 生產(chǎn)過程控制中起著重要的作用。比如閥門、電機(jī)、各類傳感器、變送器、執(zhí)行機(jī)構(gòu)等等。它們只要能準(zhǔn)確地服從命令，并且準(zhǔn)確地向上級(jí)匯報(bào)情況即完成使命。生產(chǎn)工藝的調(diào)節(jié)都是靠它來實(shí)現(xiàn)。所以，過程控制級(jí)要具備聰明的大腦，能將 “士兵 ”反饋的軍情進(jìn)行分析，然后做出命令，以使 “士兵 ”能打贏 “戰(zhàn)爭(zhēng) ”。操作員通過操作站選擇各種操作和監(jiān)視 生產(chǎn)情況、 這個(gè)級(jí)別是操作人員跟 DCS 交換信息的平臺(tái)。它所掌握的 “大權(quán) ”可以根據(jù)需要隨時(shí)進(jìn)行手動(dòng)自動(dòng)切換、修改設(shè)定值，調(diào)整控制信號(hào)、操縱現(xiàn)場(chǎng)設(shè)備，以實(shí)現(xiàn)對(duì)生產(chǎn)過程的控制。只有大規(guī)模的集散控制系統(tǒng)才具備這一級(jí)。也就是所有設(shè)備都是獨(dú)立運(yùn)行，不聯(lián)網(wǎng)控制。可是，隨著生產(chǎn)規(guī)模和復(fù)雜程度的不斷提高，原有的控制系統(tǒng)顯得滯后、笨重、繁冗、因?yàn)橐慌_(tái)儀表只有一種控制規(guī)律，要實(shí)現(xiàn)某些復(fù)雜的控制就很困難。 第三次科技革命開始后，隨著計(jì)算機(jī)技術(shù)的發(fā)展 ，人們開始嘗試將計(jì)算機(jī)用于過程控制。 直到上世紀(jì) 70 年代開始，隨著計(jì)算機(jī)技術(shù)的日漸成熟，大規(guī)模集成電路及微處理器的誕生后，人們開始思考是否能將 “危險(xiǎn)分散 ”。 進(jìn)入九十年代以后，計(jì)算機(jī)技術(shù)突飛猛進(jìn)，更多新的技術(shù)被應(yīng)用到了 DCS之中。 系統(tǒng)構(gòu)成靈活。系統(tǒng)組態(tài)很靈活。 控制功能豐富。 安裝、調(diào)試方便。通過通信網(wǎng)絡(luò)將這些硬件設(shè)備連接起來，共同實(shí)現(xiàn)數(shù)據(jù)采集、分散控制和集中監(jiān)視、操作及管理等功能。它可以是以面向連續(xù)生產(chǎn)的過程控制為主，輔以順序邏輯控制，構(gòu)成的一個(gè)可以實(shí)現(xiàn)多種復(fù)雜控制方案的現(xiàn)場(chǎng)控制站；也可以是以順序控制、連鎖控制功能為主的現(xiàn)場(chǎng)控制站；還可以是一個(gè)對(duì)大批量過程信號(hào)進(jìn)行總體信息采集的現(xiàn)場(chǎng)控制
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