【正文】 ess of the transfusion patients, promptly notify the processing will be done soon above results provide rich information for design and control of droplet device process of the system. Key words: The 51 single chip microputer, Hospital infusion system, infusion monitoring ,stepper motor 目錄 III 目錄 摘 要 .............................................................................................................................I ABSTRACT .................................................................................................................. II 目錄 .............................................................................................................................. III 第一章 引 言 .............................................................................................................. 1 課題的背景和意義 ..................................................................................................... 1 醫(yī)療輸液監(jiān)控系統(tǒng)設(shè)計(jì)的背景 .................................................................... 1 醫(yī)療輸液監(jiān)控系統(tǒng)設(shè)計(jì)的意義 .................................................................... 1 系統(tǒng)設(shè)計(jì)需要解決的關(guān)鍵問題 ................................................................... 2 第二章 系統(tǒng)方案設(shè)計(jì)與論證 ...................................................................................... 3 系統(tǒng)硬件結(jié)構(gòu)總體設(shè)計(jì)方案 ............................................................................... 3 點(diǎn)滴速度測量電路方案的選擇及論證 ................................................................. 3 液面檢測電路方案的選擇及論證 ........................................................................ 4 通過電機(jī)控制滴速電路的方案論證 ...................................................................... 5 電機(jī)控制滴速的方案設(shè)計(jì) ........................................................................... 5 控制用電動機(jī)及驅(qū)動的選擇與比較 ........................................................... 6 顯示器接口電路方案選擇論證 ........................................................................... 7 鍵盤接口電路方案選擇論證 ............................................................................... 7 獨(dú)立式按鍵電路 ......................................................................................... 7 矩陣式鍵盤電路 ......................................................................................... 7 單片機(jī)型號的選擇與論證 .................................................................................. 8 現(xiàn)有主流單片機(jī)的概述 .............................................................................. 8 單片機(jī)的選用 ............................................................................................ 8 單片機(jī) I/O 口管腳分配 ............................................................................ 12 第三章 輸液系統(tǒng)各模塊的硬件設(shè)計(jì) ........................................................................ 13 控制電機(jī)模塊設(shè)計(jì) ............................................................................................ 14 步進(jìn)電動機(jī)的工作原理 ............................................................................ 14 步進(jìn)電機(jī)控制原理 ................................................................................... 14 數(shù)據(jù)采集模塊及工作原理 .................................................................................. 16 紅外發(fā)光二極管和光敏三極管 ................................................................. 17 紅外發(fā)光二極管主要參數(shù) ........................................................................ 17 光敏三極管的主要參數(shù) ............................................................................ 18 電源模塊 .......................................................................................................... 19 聲報(bào)警模塊 ....................................................................................................... 19 復(fù)位電路 .......................................................................................................... 19 顯示模塊 .......................................................................................................... 20 LED顯示器的結(jié)構(gòu) ................................................................................... 20 LED顯示器的顯示方法 ............................................................................ 22 7 段譯碼器 CD4511 ................................................................................. 22 顯示模塊電路設(shè)計(jì) ................................................................................... 24 鍵控模塊 .......................................................................................................... 24 第四章 系統(tǒng)軟件及框圖設(shè)計(jì) .................................................................................... 27 滴速檢測子程序 ................................................................................................. 29 目錄 IV 電機(jī)控制子程序 ................................................................................................ 29 顯示子程序 ....................................................................................................... 31 鍵盤程序 .......................................................................................................... 32 第五章 系統(tǒng)設(shè)計(jì)結(jié)果分析 ........................................................................................ 34 設(shè)計(jì)實(shí)現(xiàn)過程 ................................................................................................... 34 系統(tǒng)測試及結(jié)果誤差分析 ................................................................................... 35 第六章 結(jié) 論 ............................................................................................................ 37 參考文獻(xiàn) ...................................................................................................................... 39 致謝及聲明 .................................................................................................................. 40 引言 1 第一章 引 言 課題的背景和意義 隨著科技的進(jìn)步，越來越多的地方需要用到對液體的流量或者滴速進(jìn)行控制，如人工腎機(jī)的透析液儲液罐中透析液儲量、自動洗胃機(jī)中沖洗液的液量、中藥使用的藥浴機(jī)中煎藥鍋中的水位等，醫(yī)療保健領(lǐng)域中藥液的輸液量與輸液速度需要精確的控制以達(dá)到更好治療效果。而遼寧省衛(wèi)生廳規(guī)定以滴速 4060滴 /min為 標(biāo)準(zhǔn)，高于 70滴 /min 為過快，低于 30