【正文】 SF6 氣體的電弧分解物在水分參與下會(huì)產(chǎn)生很多有毒物質(zhì)(如氟化亞硫酸、氫氟酸等) ,腐蝕斷路器內(nèi)部結(jié)構(gòu)材料并威脅檢修人員安全。本次設(shè)計(jì)的 SF6斷路器微水在線監(jiān)測(cè)儀系統(tǒng)包括現(xiàn)場(chǎng)設(shè)備監(jiān)測(cè)和遠(yuǎn)程通信兩大部分。在電力系統(tǒng)向超高壓、大電網(wǎng)、大容量和自動(dòng)化方向發(fā)展的同時(shí)，用于關(guān)合及開(kāi)斷電力線路，以輸送和倒換電力負(fù)荷以及從電力系統(tǒng)中退出故障設(shè)備以保證系統(tǒng)安全運(yùn)行的高壓開(kāi)關(guān)就顯得尤為重要了。關(guān)鍵字：PIC16F877 單片機(jī)；MBUS 總線；軟件編程； 蘭州理工大學(xué)畢業(yè)設(shè)計(jì)說(shuō)明書(shū) II AbstractSF6 circuit breakers monitor online system uses the PIC16F877 microcontroller as a processor, to achieve realtime monitoring of SF6 gas’s temperature, humidity and pressure, and to kown the running state of circuit breakers so that people could effectively deal with the insulation fault caused by SF6 gas itself, and ensure the safty of the power supply system.In this design,the basic principles of SF6 circuit breaker can be summarized as that the humidity sensor, temperature sensor and pressure sensor are connected to the SF6 gas room by the jointer,which can survey the humidity, temperature, pressure of SF6 gas. the measured analog go through the A / D conversion, data analysis in the PIC16F877 microcontroller, to implement data overrun alarm and demonstrate temperature, pressure and information transmission between slaves and the master generates a standard munication packets based on MODBUS protocol to achieve realtime control.Keyword: PIC16F877 microcontroller。本次設(shè)計(jì)的 SF6斷路器微水在線監(jiān)測(cè)系統(tǒng)的基本原理為：將濕度、溫度、壓力傳感器通過(guò)連接器件連接到 SF6氣室，測(cè)量氣室內(nèi) SF6氣體的濕度、溫度、壓力。對(duì)由于 SF6 氣體本身原因引起的絕緣故障做出有效應(yīng)對(duì)，進(jìn)而保證電網(wǎng)的運(yùn)行安全。數(shù)據(jù)包通過(guò) MBUS總線送入上位機(jī)，進(jìn)行計(jì)算機(jī)實(shí)時(shí)監(jiān)控。目 錄蘭州理工大學(xué)畢業(yè)設(shè)計(jì)說(shuō)明書(shū)III摘 要 ..................................................................IABSTRACT.................................................................II第一章 緒 論 ..........................................................1 景...............................................................1（研究）內(nèi) 容 ..................................................3.......................................................3.........................................................3第二章 系統(tǒng)總體結(jié)構(gòu)方案設(shè)計(jì) ..............................................5...................................................5...............................................................5...............................................................5...............................................................6...............................................................7.............................................................7第三章 系統(tǒng)的硬件設(shè)計(jì) ...................................................10................................................................10 PIC16F877單片機(jī)特點(diǎn)................................................10............................................................11............................................................12....................................................12 溫度傳感器接口電路 .................................................14 小結(jié) ...............................................................14............................................................14....................................................15 接口電路 ...........................................................16 小結(jié) ...............................................................18............................................................18....................................................18 接口電路 ...........................................................19 小結(jié) ...............................................................19..............................................................19..............................................................20 LCD顯示模塊 ..........................................................20 LCD顯示模塊的選型..................................................21 接口電路 ...........................................................21蘭州理工大學(xué)畢業(yè)設(shè)計(jì)說(shuō)明書(shū)IV 小結(jié) ...............................................................21..........................................................22......................................................22.........................................................22.......................................................23...................................................24 TSS721A芯片介紹...................................................25 TSS721A芯片與單片機(jī)接口電路設(shè)計(jì)...................................27...............................................................29...........................................................29...........................................................29 接線電路 ..........................................................30...................................................31...............................................................31第四章 軟件設(shè)計(jì) .........................................................33....................................................33......................................................33 ......................................................33 AD轉(zhuǎn)換子程序.......................................................36 LCD顯示子程序......................................................37 中斷服務(wù)子程序 .....................................................39 鍵盤(pán)子程序 .........................................................40 解除報(bào)警子程 .......................................................41 串行通信子程序 .....................................................41第五章 總 結(jié) ...........................................................47......................................47....................................................47參考文獻(xiàn) .................................................................48英文原文及翻譯 ...........................................................49原文 .....................................................................49翻譯 .....................................................................57致 謝 .................................................................63附錄 .....................................................................64程序清單 .............................................................