【正文】 ......................................................................... 15 設(shè)計(jì)需求及原則 ........................................................................................................... 16 系統(tǒng)要求 ................................................................................................................. 16 功能需求 ................................................................................................................. 16 設(shè)計(jì)原則 ................................................................................................................. 17 總體設(shè)計(jì)方案 ............................................................................................................... 18 監(jiān)控系統(tǒng)的構(gòu)成 ..................................................................................................... 18 監(jiān)控系統(tǒng)的功能劃分 ............................................................................................. 18 系統(tǒng)通信模式 ......................................................................................................... 19 監(jiān)控系統(tǒng)的特點(diǎn) ..................................................................................................... 20 本章小結(jié) ....................................................................................................................... 20 目 錄 II 3 無(wú)線測(cè)溫終端的設(shè)計(jì) .......................................................................................................... 21 無(wú)線測(cè)溫終端的硬件結(jié)構(gòu)組成 ................................................................................... 21 節(jié)點(diǎn)硬件平臺(tái) ............................................................................................................... 22 ZigBee 無(wú)線傳輸模塊介紹 ..................................................................................... 22 溫度傳感的選型及介紹 ......................................................................................... 24 MAX6675 介紹 ........................................................................................................ 25 K 型熱電偶補(bǔ)償導(dǎo)線 .............................................................................................. 28 硬件電路原理圖及實(shí)物的實(shí)現(xiàn) ................................................................................... 29 硬件原理圖 ............................................................................................................. 29 硬件實(shí)物的實(shí)現(xiàn) ..................................................................................................... 30 無(wú)線測(cè)溫終端的軟件設(shè)計(jì) ........................................................................................... 30 硬件抗干擾設(shè)計(jì) ........................................................................................................... 31 本章小結(jié) ....................................................................................................................... 32 4 ZigBeeGPRS 網(wǎng)關(guān)的設(shè)計(jì) ................................................................................................... 33 ZigBeeGPRS 網(wǎng)關(guān)的硬件結(jié)構(gòu)組成 ............................................................................ 33 ZigBeeGPRS 網(wǎng)關(guān)的硬件平臺(tái) .................................................................................... 33 硬件連接圖及實(shí)物的實(shí)現(xiàn) ........................................................................................... 36 硬件連接框圖 ......................................................................................................... 36 實(shí)物圖 ..................................................................................................................... 36 ZigBeeGPRS 網(wǎng)關(guān)的軟件設(shè)計(jì) .................................................................................... 37 協(xié)議數(shù)據(jù)轉(zhuǎn)換 ......................................................................................................... 37 ZigBeeGPRS 網(wǎng)關(guān)軟件設(shè)計(jì) .................................................................................. 37 SMS 方式的軟件實(shí)現(xiàn) ............................................................................................. 39 ZigBeeGPRS 網(wǎng)關(guān)的協(xié)議 ............................................................................................ 41 TCP/IP 軟件設(shè)計(jì)原則 ............................................................................................. 41 嵌入式系統(tǒng)軟件組成 ............................................................................................. 43 本章小結(jié) ....................................................................................................................... 44 5 上位機(jī)監(jiān)控中心系統(tǒng)設(shè)計(jì) .................................................................................................. 45 上位機(jī)監(jiān)控中心系統(tǒng)軟件設(shè)計(jì) ................................................................................... 45 數(shù)據(jù)接口設(shè)計(jì) ............................................................................................................... 46 Web Service 接口方式 ............................................................................................. 46 數(shù)據(jù)結(jié)構(gòu)的交互格式 ............................................................................................. 47 數(shù)據(jù)交換框架 ......................................................................................................... 48 軟件的功能的實(shí)現(xiàn) ........................................................................................................ 49 目 錄 III 系統(tǒng)登陸模塊 ......................................................................................................... 49 實(shí)時(shí)數(shù)據(jù)查詢模塊 ................................................................................................. 50 歷史數(shù)據(jù)查詢模塊 ................................................................................................. 50 設(shè)備管理模塊 ......................................................................................................... 51 用戶管理模塊 ......................................................................................................... 51 預(yù)警值參數(shù)設(shè)置模塊 ............................................................................................. 52