【正文】 f the liquid level detection, we can get good effect. The research object is based on the selfmade double tank level control system, through the host puter, the Advantech PCI1710L card, the electric control valve, the pressure liquid level transmitter, the frequency converter and the water pump we get two different kinds of the cascade control system for the single water tank of the liquid level control, respectively realized the effect of the remote control and local control. And at last, this article expounds the theory of double water tank control method. Choose the design of configuration software – King view for development tools, we have had the development of the system to monitor and control interface, and also have programmed PID control procedures that made the system has a field process data, dynamic monitoring historical data archiving function, abnormal signal of the alarm function and the guidance function of the onsite operation. Keywords: Tank level。 King view。 內(nèi)蒙古科技大學(xué)畢業(yè)設(shè)計(jì)說明書（畢業(yè)論文） III 目錄 摘要 ................................................................................................................................. I Abstract .......................................................................................................................... II 第一章 緒論 .................................................................................................................. 1 選題背景及意義 ............................................................................................... 1 液位控制系統(tǒng)的發(fā)展現(xiàn)狀 .............................................................................. 2 本文的主要工作 .............................................................................................. 3 第二章 控制對象及算法簡介 ...................................................................................... 5 被控制變量的選擇 ........................................................................................... 5 執(zhí)行器的選擇 .................................................................................................. 5 壓力液位變送器的選擇 .................................................................................. 5 研華板卡 PCI1710L 簡介 ............................................................................... 6 模擬量輸入連接 ..................................................................................... 8 PID 控制算法概述 ............................................................................................ 9 PID 控制器的應(yīng)用與發(fā)展 ...................................................................... 9 PID 算法類型 [1] ..................................................................................... 10 PID 兩種控制方式 ................................................................................ 11 第三章 基于組態(tài)王的單容水箱液位控制系統(tǒng) ........................................................ 13 組態(tài)王簡介 [8].................................................................................................. 13 組態(tài)王軟件的組成 ............................................................................... 13 制作工程的一般步驟 .......................................................................... 14 組態(tài)王與外部設(shè)備通信 ...................................................................... 14 控制方案選取 ................................................................................................. 15 上位機(jī)組態(tài)軟件的開發(fā) ................................................................................ 16 監(jiān)控畫面 ............................................................................................... 16 構(gòu)造數(shù)據(jù)庫 ........................................................................................... 17 數(shù)據(jù)通信 ............................................................................................... 19 命令語言的編寫 .................................................................................. 20 內(nèi)蒙古科技大學(xué)畢業(yè)設(shè)計(jì)說明書（畢業(yè)論文） IV 實(shí)時(shí)曲線 .............................................................................................. 21 歷史報(bào)警 查詢 [11] ................................................................................. 21 歷史曲線 .............................................................................................. 23 參數(shù)整定 ........................................................................................................ 25 第四章 基于變頻器的單容液位控制系統(tǒng) ................................................................ 26 變頻調(diào)速基礎(chǔ) ............................................................................................... 26 三菱通用變頻器 FRD700 簡要介紹 ........................................................... 27 FRD700 簡介 ..................................................................................... 27 三菱變頻器 常規(guī)介紹 ...................................... 28 控制電路接線端極端子功能介紹 ..................................................... 29 操作面板及其功能介紹 .................................................................... 31 變頻器的作用 ............................................................................................... 31 控制系統(tǒng)調(diào)試 ............................................................................................... 32 操作步驟 ............................................................................................ 33 參數(shù)整定 ............................................................................................ 33 第五章 雙容水箱液位控制系統(tǒng) ................................................................................ 35 串級控制 ........................................................................................................ 35 串級控制概念 .................................................................................... 35 水箱液位控制方法 ............................................................................ 36 串級控制的特點(diǎn) ................................................................................ 36 串級控制系統(tǒng)的設(shè)計(jì) ..............................................................................