基于電力線載波通信技術(shù)的礦井通風(fēng)監(jiān)控系統(tǒng)

1、論文題目：基于電力線載波通信技術(shù)的礦井通風(fēng)監(jiān)控系統(tǒng)專業(yè)：測試計(jì)量技術(shù)及儀器碩士生：侯雅麗（簽名）指導(dǎo)教師：郝迎吉（簽名）摘要本文提出一種基于電力線載波通信技術(shù)的礦井通風(fēng)監(jiān)控系統(tǒng)設(shè)計(jì)方案，主要研究了電力線載波通信的調(diào)制技術(shù)以及監(jiān)控分站的軟硬件設(shè)計(jì)。系統(tǒng)采用SCADA的控制理念，將井下已有照明線路作為系統(tǒng)底層通信鏈路，不僅能提供足夠多的監(jiān)測覆蓋面，還可減少因線路故障而引起的系統(tǒng)失效；設(shè)計(jì)以ATmega128單片機(jī)為核心的監(jiān)控分站并將其作為系

2、統(tǒng)遠(yuǎn)程終端單元，可實(shí)現(xiàn)對井下瓦斯、CO、溫度、風(fēng)速等參數(shù)及局部通風(fēng)機(jī)等機(jī)電設(shè)備運(yùn)行狀態(tài)的實(shí)時(shí)監(jiān)測。針對傳統(tǒng)調(diào)制技術(shù)應(yīng)用于電力線通信時(shí)質(zhì)量差的問題，本文提出將擴(kuò)頻技術(shù)作為載波調(diào)制技術(shù)，利用其良好的抗干擾性、抗衰落性，將電力線載波通信應(yīng)用于本系統(tǒng)中。監(jiān)控分站硬件部分主要包括電源模塊、數(shù)據(jù)采集模塊、存儲單元、通信模塊及人機(jī)接口。針對井下通常使用的電流型傳感器設(shè)計(jì)了IV轉(zhuǎn)換電路，配合ATmega128內(nèi)部10位ADC實(shí)現(xiàn)對8路模擬輸入的循環(huán)采集

3、，并在軟件中采用數(shù)字濾波技術(shù)對數(shù)據(jù)進(jìn)行處理以降低誤差；設(shè)計(jì)了基于PL2102及其相應(yīng)載波發(fā)送、接收及耦合電路的載波模塊，并在軟件中采用MODBUSRTU協(xié)議實(shí)現(xiàn)中心站與分站間總線式的通信；為保證監(jiān)控分站的獨(dú)立性，采用接口為SPI、容量為2MB的閃存PM25LV016作為存儲單元，與TC配合實(shí)現(xiàn)監(jiān)測量實(shí)時(shí)、快速、準(zhǔn)確存儲；擴(kuò)展的液晶顯示屏和鍵盤支持監(jiān)測監(jiān)控量實(shí)時(shí)顯示及參數(shù)就地手動(dòng)更改，使系統(tǒng)功能更加完善。通過實(shí)驗(yàn)驗(yàn)證，所設(shè)計(jì)的監(jiān)控分站測試

4、精度能達(dá)1.2%，實(shí)現(xiàn)了顯示、存儲以及參數(shù)更改等功能，滿足了監(jiān)控分站的設(shè)計(jì)要求。關(guān)鍵詞：礦井通風(fēng)；電力線載波通信；擴(kuò)頻通信；監(jiān)控分站；ATmega128；PL2102；研究類型：應(yīng)用研究萬方數(shù)據(jù)Subject:TheMineVentilationMonitControlSystemBasedonPowerLineCarrierCommunicationSpecialty:MeasuringTestingTechnologiesInstr

5、umentsName:HouYali(Signature)Instruct:HaoYingji(Signature)ABSTRACTThispaperproposesakindofmineventilationmonitcontrolsystembasedonpowerlinecarriercommunication.Themainresearchcontentsofthispaperarekeytechnologyofpowerlin

6、ecarriercommunicationhardwaresoftwaredesignofmonitingsubstation.UsingtheconceptofSCADAthispaperproposesadatatransmissionplanwhichuseexistingdownholelightingcableasthecommunicationlinkswhichcannotonlyprovideenoughmoniting

7、coveragebutalsoreducethesystemfailurecausedbybrokenlines.ThispaperalsodesignsanmonitingsubstationbasedonATmega128takesthesubstationasremoteterminalunitwhichcancollectseveralparameterssuchasgasCOtemperaturewindspeedrunnin

8、gstatusoflocalfanothermechanicalelectricalequipment.AimedatthepoqualityoftraditionalmodulationtechnologyappliedinpowerlinecommunicationthepaperchoosesSpreadSpectrummethodasthekeytechnologyofPLC.Thegoodantiinterferenceres

9、istancetodeclinemakePLChasgreatpossibilityappliedinthemineventilationmonitcontrolsystem.Thehardwareofthissubstationcontainspowersupplymoduledataacquisitionmoduleastageunitcommunicationmodulemanmachineinterface.Currentsen

10、ssarecommonlyusedinmineonthisbasisIVconversioncircuitisdesignedwkswith10bitsADCofATmega128itcanachievecycleof8channelsundergroundenvironmentparametersgatheringdigitalfilteringtechnologyisusedinthesoftwarefreducingerr.Car

11、riermodulebasedonPL2102isdesignedwkswithrelevantcarriersendingreceivingcouplingcircuitsMODBUSRTUprotocolisusedinsoftwaretoachievebuscommunicationbetweenmasterstationsubstation.ToachieverealtimerapidaccuratesavePM25LV016w