【正文】 .................................................................... 5 選題意義 .................................................................................................................... 5 本次設(shè)計(jì)的主要工作 ................................................................................................ 5 2 系統(tǒng)工作原理 ........................................................................ 7 控制系統(tǒng)要求 .................................................................................................................... 7 控制系統(tǒng)功能要求 .................................................................................................... 7 設(shè)計(jì)技術(shù)指標(biāo) ............................................................................................................ 7 設(shè)計(jì)原則 .................................................................................................................... 8 系統(tǒng)的保護(hù)設(shè)計(jì)框架 ................................................................................................ 8 系統(tǒng)控制方案的確定 ........................................................................................................ 9 方案概述 .................................................................................................................... 9 方案確定 .................................................................................................................... 9 系統(tǒng)工作原理 .................................................................................................................. 11 系統(tǒng)整體結(jié)構(gòu)模型 .................................................................................................. 11 系統(tǒng)組成及框圖 ......................................................................................................12 系統(tǒng)主要工作流程 ..................................................................................................13 3 系統(tǒng)硬件設(shè)計(jì) ...................................................................... 15 系統(tǒng)硬件總體組成 ..........................................................................................................15 系統(tǒng)硬件組成 ..........................................................................................................15 系統(tǒng)機(jī)械流體部分組成 .........................................................................................15 系統(tǒng)電氣部分組成 ..................................................................................................16 泵的選型和設(shè)計(jì) ..............................................................................................................16 系統(tǒng)要求 ..................................................................................................................16 畢業(yè)設(shè)計(jì)（論文）說明書 2 擬選用的元件 ..........................................................................................................16 PLC控制部分的的設(shè)計(jì) ...................................................................................................17 PLC的 I/O 需求和分配 ..........................................................................................17 PLC的選型和主要技術(shù)指標(biāo) ..................................................................................18 轉(zhuǎn)換部分設(shè)計(jì) ..................................................................................................................21 轉(zhuǎn)換部分方案的確定 ..............................................................................................21 單片機(jī) PIC18F2480簡(jiǎn)介 .......................................................................................23 單片機(jī) PIC18F2480電路設(shè)計(jì) ...............................................................................26 檢測(cè)部分設(shè)計(jì) ..................................................................................................................29 鉑熱敏電阻 PT1000...............................................................................................29 JLS40壓力傳感器 ...................................................................................................30 AD靶式流量開關(guān) .....................................................................................................30 三達(dá)德 KH－ 32型電流互感器 ...............................................................................31 抗干擾處理、保護(hù)設(shè)計(jì) ..................................................................................................32 .............................................................................................................32 .................................................................................................33 系統(tǒng)組要元件 ..................................................................................................................34 4 系統(tǒng)的軟件設(shè)計(jì) .................................................................. 35 軟件設(shè)計(jì)概述 ..................................................................................................................35 控制主程序的梯形圖設(shè)計(jì) ..............................................................................................39 單片機(jī)部分 C語言設(shè)計(jì) ..................................................................................................45 5 通信部分設(shè)計(jì) ...................................................................... 50 系統(tǒng)聯(lián)網(wǎng)和通信部分框架 ..............................................................................................50 系統(tǒng)與上位機(jī)通信部分方案設(shè)計(jì) .................................................................................52 6 組態(tài)部分設(shè)計(jì) ...................................................................... 54 組態(tài)方案概述 ..................................................................................................................54 組態(tài)設(shè)計(jì) ...........................................................................................................................54 ......................................................................................................................54 變量設(shè)計(jì) ..................................................................................................