【正文】 I 河西學(xué)院本科生畢業(yè)論文（設(shè)計(jì)）誠信聲明 ...................................................... 錯(cuò)誤 !未定義書簽。 目錄 .................................................................................................................. 錯(cuò)誤 !未定義書簽。 河西學(xué)院本科生畢業(yè)論文（設(shè)計(jì)）任務(wù)書 .................................................................................... III 河西學(xué)院本科畢業(yè)論文（設(shè)計(jì)）開題報(bào)告 .................................................................................... IV 水箱恒溫控制系統(tǒng)設(shè)計(jì)與制作 ....................................................................................................... 1 摘要 .............................................................................................................................................. 1 關(guān)鍵詞 .......................................................................................................................................... 1 0引言 ........................................................................................................................................... 2 1系統(tǒng)方案 .................................................................................................................................... 3 水溫控制系統(tǒng)設(shè)計(jì)任務(wù)和要求 ......................................................................................... 3 ............................................................................................. 3 溫度采集部分 .......................................................................................................... 3 控制主體部分 .......................................................................................................... 4 加熱控制部分 .......................................................................................................... 4 溫度控制算法部分 ................................................................................................... 4 總體設(shè)計(jì)框圖 .................................................................................................................. 7 2單元硬件電路設(shè)計(jì) ...................................................................................................................... 7 ........................................................................................................... 7 .................................................................................................................. 8 行通信電路 ........................................................................................................... 9 3系統(tǒng)軟件設(shè)計(jì) ........................................................................................................................... 10 （ AT89S52）程序 ................................................................................................. 10 下位機(jī)（ AT89S52）主程序 .................................................................................... 10 系統(tǒng)初始化 ........................................................................................................... 10 溫度采集 ............................................................................................................... 10 串行通信 ............................................................................................................... 12 繼電器控制 ......................................................................................................... 12 （ LabVIEW）程序設(shè)計(jì) .......................................................................................... 13 LabVIEW 簡介 ...................................................................................................... 13 VISA 概述 ............................................................................................................ 13 前面板設(shè)計(jì) ........................................................................................................... 14 主程序設(shè)計(jì) ........................................................................................................... 14 4系統(tǒng)調(diào)試 .................................................................................................................................. 16 II 繼電器測試 ................................................................................................................... 16 ...................................................................................................... 16 ....................................................................................................................... 16 測試環(huán)境 ............................................................................................................... 16 測試方法 ............................................................................................................... 17 測試數(shù)據(jù) ............................................................................................................... 17 系統(tǒng)誤差分析 ........................................................................................................ 17 5結(jié)論 ......................................................................................................................................... 18 設(shè)計(jì)心得 ..................................................................................................................................... 18 參考文獻(xiàn) ..................................................................................................................................... 18 致謝 ............................................................................................................................................ 19 附錄 1 單片機(jī)源程序 ..................................................................................................................