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1、摘要在樓宇自控化系統(tǒng)中,不同功能的子系統(tǒng)可能分別由來自不同廠商的樓宇自控設(shè)備組成。雖然很多集成商選擇了象BACnet這樣的開放協(xié)議作為主干,但往往也會存在個別設(shè)備使用Lonworks、Mo曲us等相對專用協(xié)議。這時要實現(xiàn)樓宇自控系統(tǒng)的集成,比較實際的方法是使用被稱為網(wǎng)關(guān)的協(xié)議轉(zhuǎn)換設(shè)備。本文正是在這種應(yīng)用背景下展開研究的。針對Lonworks標(biāo)準(zhǔn)和BACnet標(biāo)準(zhǔn)代表著樓宇自控協(xié)議標(biāo)準(zhǔn)的發(fā)展趨勢,本課題選擇了L。nworks—BAcne網(wǎng)關(guān)作為研究對象。本文對Lonworks技術(shù)做了比較系統(tǒng)的介紹,設(shè)計開發(fā)了用于測試的節(jié)點硬件與軟件。隨后從概念、特點、內(nèi)容等方面對BACnet作了簡明扼要的闡述,
2、其中重點對基于TcP/IP的BACnet/IP的應(yīng)用作了介紹,并以此為網(wǎng)關(guān)所連BACnet網(wǎng)絡(luò)的默認(rèn)結(jié)構(gòu)。通過市場調(diào)研與對世界最新技術(shù)的跟蹤,本文提出了基于MIP、基于ORlON協(xié)議棧和基于LNS三種開發(fā)模式。同時對每一個開發(fā)模式的硬件、軟件以及整體結(jié)構(gòu)作了分析和比較。根據(jù)對資金投入與開發(fā)周期的考慮,最終選用了基于LNs的Lonworks—BAcnet網(wǎng)關(guān)作為本課題的開發(fā)方案。在對LNS技術(shù)作了綜述后,介紹了LNs下的Lonworks網(wǎng)絡(luò)管理。隨后建立了LNs應(yīng)用的開發(fā)環(huán)境,對LNswindows監(jiān)控應(yīng)用程序的開發(fā)進行了闡述,并完成了網(wǎng)關(guān)中Lonw。rks部分的網(wǎng)絡(luò)監(jiān)控程序。文章最后對所研究網(wǎng)
3、關(guān)的工作原理與實現(xiàn)方法作了較為詳細的闡述,通過一個實例,介紹了網(wǎng)關(guān)配置文件的編寫方法。并對網(wǎng)關(guān)的應(yīng)用階段工作和與上位機監(jiān)控軟件的接口作了說明。關(guān)鍵詞樓宇自控:網(wǎng)關(guān):Lonworks:BAcnet:LNSAbstractInthebuildingautomationandcontrolsystem,thevariousfunctionsubsystemsperhapsarecomposedofbuildingautomationandcontroldevicesfromdifferentmanufactures.A1thoughmanvincegratorsdoesselectBAC幾etast
4、heprimaryprotocol,therewillbemanyindiVidualdeVicesthatwilluseaproprietaryprotocol—LonWorks,Modbus,orsomethjngelse.TheonlypracticalwaytorealizetheintegrationofbuildingautomationandcontrolsystemisvlaaproLocoLgateway.Inthispaper,thediscussioniscarriedoutbascdonsuchapplicationbackground.AimingatcheLonWo
5、rksandBACnetstandardsrepresentthedevelopmenttrendofthebuildingautomationandcontrolprotocolstandards,LonWorks—BACnetgatewayischoseastheresearchobjectinthisproject,LonWorkstechnologyisintroducedsystemica兒yandthehardwareandsoftwareoftestingnodearedesignedanddeVeloped.Subseque九tly,theBACnetisexpatiatedc
6、onciselyfromtheaspectsofconceDt。characteristic,content,etc.Inthispart,theapplicationof、BACnet/IPbasedonTCP/IPisemphasislyintroduced.MoreoVer,BACnet/IPisconsidered8sthedefaultstructure.Bvthemarketresearchandthetrackofup—to—datetechnOlogyintheworld,threedevelopmentmodethatbasedonMIP,basedonORl0NDroLoc
7、01stackandbasedonLNSareputforwordinthepaper.Atthesametime。thehardware,softwareandwholeframeworkofeVerydeveloDmentmodeisanalysedandcompared.Inconsiderationofinvestmentanddevelopme幾tperiod,LonWorks—BACn