文檔-火災(zāi)報(bào)警器中英文文獻(xiàn)翻譯-基于單片機(jī)的火災(zāi)探測和監(jiān)控系統(tǒng)-單片機(jī)

DOC-火災(zāi)報(bào)警器中英文文獻(xiàn)翻譯--基于單片機(jī)的火災(zāi)探測和監(jiān)控系統(tǒng)-單片機(jī)外文文獻(xiàn)原稿和譯文原稿Multiplesingle-chipmicrocomputerapproachtofiredetectionandmonitoringsystemA.J.AI-Khalili,MSc,PhDD.AI-Khalili,MSc,PhDM.S.Khassem,MScIndexingterm:Hazards,Design,PlantconditionmonitoringAbstract:Acompletesystemforfiredetectionandalarmmonitoringhasbeenproposedforcomplexplants.Thesystemusesmultiplesinglechiparchitectureattachedtoapartyline.Thecontrolalgorithmisbasedonatwo-levelhierarchyofdecisionmaking,thusthecomplexityisdistributed.Acompletecircuitdiagramisgivenforthelocalandthecentralstationwithrequirementsforthesoftwarestructure.Thedesigniskeptingeneralformsuchthatitcanbeadaptedtoamultitudeofplantconfigurations.Itisparticularlyshownhownewdevelopmentsintechnology,especiallyCMOSsinglechipdevices,areincorporatedinthesystemdesigntoreducethecomplexityoftheoverallhardware,e.g.bydecomposingthesystemsuchthatlowerlevelsofhierarchyareabletohavesomeautonomyindecisionmaking,andthusamorecomplexdecisionissolvedinasimpledistributedmethod.1IntroductionRegulatoryrequirementsformosthighriskplantsandbuildingsmandatetheinstallationoffiredetectionandwarningsystemsforallsensitiveareasoftheplantorthebuilding.Mostfirecodesstatetherequirementformonitoringandcontrolpecificallyrelatedtoatypeofaplantorbuildingsuchaschemicalplants,petroleum,snuclearplants,residentialhigh-risesetc.Ageneralconclusionofthesecodescanbespecifiedasthefollowingrequirements:(a)Thesourceofalldetectorsignalsshouldbeexactlyidentifiablebythecentralstation(b)Anextrapathofcommunicationbetweenthecentralstationandalllocalcontrollers(c)Directmeansofcontrolofalarmandcentralequipmentbythecentralstation(d)Meansofcommunicationbetweenthecentralstationandthefiredepartment(e)Availabilityofemergencypowersupply.Thecodesusuallyalsospecifythetypesandfrequencyoftestsforallequipment.Afiredetectionandalarmsystemisacombinationofdevicesdesignedtosignalanalarmincaseofafire.Thesystemmayalsoaccomplishfancontrol,firedoorholdorrelease,elevatorrecall,emergencylightingcontrolandotheremergencyfunctions.Theseadditionalfunctionssupplementthebasicsystemwhichconsistsofdetectionandalarmdevicesandcentralcontrolunit.Technologyhasaninfluenceonsystemarchitecture.Whentechnologychanges,thearchitecturehastoberevisedtotakeadvantageofthesechanges.Inrecentyears,VLSItechnologyhasbeenadvancingatanexponentialrate.FirstNMOSand,inthelastyearortwo,CMOSchipshavebeenproducedwiththesamepackingdensitywithmoregatesperchipyetatalowerpowerconsumptionthanNMOS.Surelythischangeintechnologymustaffectourdesignofhardwareatboththechipandthesystemlevel.Atthechiplevel,singlechipsarenowbeingproducedwhichareequivalenttoboardlevelsofonlythepreviousyearortwo.Thesechipshavemicroprocessor,memoryinRAMandROM,IOPortsbothserialandparallel,A/Dtimer,flagsandotherfunctionsonchip.Atthesystemlevel,thenewchipsmakenewarchitecturespossible.Theobjectiveofthispaperistoshowhowtechnologycaninfluencesystemarchitectureinthefieldoffirecontrol.Thenewhighdensitysinglechipmicrocontrollersareincorporatedinthedesignofalargescalesystemandyetweobtainasmallersystemwithabetterperformance.Intermsoffiredetectionandalarmmonitoring,thisisreflecteddirectlyinthelocalstationhardware,becauseoftheirremotenessandpowersupplyrequirements.AcompletelocalstationcanbedesignedaroundasingleCMOSchipwithpowerconsumptionofafewmWdependingonsystemoperation.Thisapproachreducesthecostandcomplexityofdesign,implementationandmaintenanceandprovideseasilyexpandableandportabledesign.Thisimplementationwasnotpossiblewitholdtechnology.Mostoffiredetection/monitoringsystemsavailablearetailoredtowardsaspecificapplicationandlacktheuseofrecentadvancesinCMOSVLSItechnology.Inthisstudy,wedevelopafiredetection/monitoringsystemwhichisgeneralinconcept,readilyimplementableinamultitudeofapplicationsforearlydetectionofafirebeforeitbecomescritical,forequipmentandevacuationofpersonnel.Here,weproposeacentralcontrolanddistributedcontrol/detection/monitoringwithadequatecommunication,whereuseismadeofsingle-chipmicrocontrollersinthelocalstations,thusimprovingcontrollabilityandobservabilityofthemonitoringprocess.2DetectionandalarmdevicesAbasicfiredetectionsystemconsistsoftwoparts,detectionandannunciation.Anautomaticdetectiondevice,suchasaheat,smokeorflamedetector,ultravioletorinfrareddetectorsorflameflicker,isbasedondetectingthebyproductofacombustion.Smokedetectors,ofbothionizationandopticaltypes,arethemostcommonlyuseddetectordevices.WhenatypicaldetectorofthistypeentersthealarmstateitscurrentconsumptionincreasesfromthepAtothemArange(say,fromamere15pAinthedormantmodeto60mA)intheactivemode.Inmanydetectorsthedetectoroutputvoltageiswelldefinedundervariousoperatingconditions,suchasthosegiveninTable1.Themoresensitivethedetector,themoresusceptibleitistofalsealarms.Inordertocontrolthedetectorprecisely,eitherofthefollowingmethodsisused:acoincidencetechniquecanbebuiltintothedetector,orafilteringtechniquesuchthatalogiccircuitbecomesactiveonlyifxalarmsaredetectedwithinatimeperiodT.Thedetectiontechniquedependsgreatlyonthelocationandplantbeingprotected;smokedetectorsareusedforsleepingareas,infraredorultravioletradiationareusedwhenflammableliquidsarebeinghandled,heatdetectorsareusedforfiresuppressionorextinguishingsystems.Ingeneral,lifeandpropertyprotectionhavedifferentapproaches.Alarmdevices,apartfromtheusualaudibleorvisiblealarms,mayincorporatesolidstatesoundreproductionandemergencyvoicecommunicationorprintersthatrecordtime,date,locationandotherinformationrequiredbythestandardcodeofpracticeforfireprotectionforcomplexplants.Heaviside[4]hasanexcellentreviewofalltypesofdetectorsandextinguishersystems.2.1ControlphilosophyanddivisionoflabourOurcontrolphilosophyisimplementedhierarchically.Threelevelsofsystemhierarchyareimplemented,withtwolevelsofdecisionmaking.Thereisnocommunicationbetweenequipmentonthesamelevel.Interactionbetweenlevelsoccursbyupwardstransferofinformationregardingthestatusofthesubsystemsanddownwardstransferofcommands.ThisisshowninFig.1whereatlevel1isthecentralstationmicrocomputerandistheultimatedecisionmaker(whennotinmanualmode).Atlevel2arethelocalcontrollers,whichresideinthelocalstations.Atlevel3aretheactualdetectorsandactuators.Amanualmodeofoperationisprovidedatalllevels.Informationregardingthestatusofalldetectorsistransmittedonaperareabasistothelocalcontrollers.Theirinformationiscondensedandtransmittedupwardtothecentralmicrocomputer.Transferofstatusisalwaysunidirectionalandupwards.Transferofcommandsisalwaysunidirectionalanddownwards,withexpansionatthelocalcontrollevel.Thisapproachpreservesthestrictrulesofthehierarchyforexactmonitoringdetectionandalarmsystemsassociatedwithhighriskplants.Theclassificationofthetwolayersofcontrolsisbaseduponlayersofdecisionmaking,withrespecttothefactsthat(a)Whenthedecisiontimecomes,themakingandimplementationofadecisioncannotbepostponed(b)Thedecisionshaveuncertainty(c)Itwillisolatelocaldecisions(e.g.locallywemighthaveanalarmalthoughtheremaybeafaultwiththesystem)3GeneralhardwareI:Fig.2depictsourdesigninthesimplestofforms.Thesystemusesanopenpartylineapproachwithfourconductorcablesgoinginaloopsharedbyalltheremotedevicesandthecontrolpanel.Thisapproachissimpleinconceptandiseconomicallyfeasible.However,onemajordisadvantageisthedependencyonasinglecableforpowerandsignaling.Incaseswherereliabilityisofextremeimportance,twooreventhreecablestakingdifferentroutesthroughoutthesystemmaybeconnectedinparallel.Fig.3givesthedrivercircuitryrequiredtoderiveanexpandablebus.Thisdesigntakesadvantageofrecentadvancesinthesinglechipmicrocomputertechnologytoreducetheinterfacebetweenthecentralstationandthelocalstations.3.1CentralcontroltaskAcentralunitprovidesacentralizedpointtomonitorandcontrolthesystemactivities.Inthesystemtobedescribedthecentralcontrolunitservesafivefoldpurpose.(i)Itreceivesinformationfromthelocalstationsandoperatesthealarmsandotheroutputdevices.(ii)Itnotifiestheoperatorincaseofsystemmalfunction.(iii)Itprovidesanoverallsystemcontrolmanualandautomatic.(iu)Itprovidesasystemtestpointoflocalstationsanditself.(u)Itprovidesacentralpointforobservation,learningandadaptation.3.2LocalstationsThelocalstationscantakelocaldecisionsregardingrecognitionofarisksituation,andactindependentlyonlocalaffairs.Inthistechniquewedependon‘load-typecoordination’,e.g.thelowerlevelunitsrecognizetheexistenceofotherdecisionunitsonthesamelevel;thecentralorthetoplevelprovidesthelowerunitswithamodeloftherelationshipbetweenitsactionandtheresponseofthesystem.Itisevidentthatapowerfulmachineisrequiredatthisstagesothatalltherequiredfunctionscanbeimplemented.Theavailabilityofthenewgenerationofmicrochipsmakesthisarchitectureafeasiblesolution.Asinglechipmicrocomputerwaschosenoverdiscretedigitalandanaloguedevicestointerfacetothefielddevicesandtothecentralmicrocomputer.Thisisthemainreasonthatpreviouslythisapproachwasnotfeasible.Inselectingthemicrocomputerforthelocalstations,thecriterionwastherequirementforachipwhichcontainsthemostintegrationoftheanalogueanddigitalportsrequiredfortheinterfaceandtheutilizationofCMOStechnologyowingtoremotenessofthelocalstations.ThechoicewastheMotorola68HC11A4,forthefollowingreasons:(a)ItisCMOStechnology;thisreducespowerconsumption.(b)IthasaUARTonboard;thisfacilitatesserialcommunication.(e)Ithasana/dconverteronboard;thiseliminatesanexternalA/D.(d)Ithas4KofROM,256bytesofRAM,512bytesofEERROMwith401/0linesanda16bittimer;thissatisfiedallourmemoryand1/0requirementsatthelocalstationside.4SystemimplementationThelocalstation:Fig.3istheblockdiagramofthecircuitusedtoutilizetheMC68HCllA4asaremotefiredetectingcircuitwhileFig.4illustratesthesamecircuitinanexpandedform.Itcanbeseenthatthesinglemicrocontrollercanbeusedtomonitormorethanonedetector,thusreducingsystemcost.Thelooppowersupply,whichisusuallybetween28and26V,isfurtherregulatedbya5V100mAmonolithiclowpowervoltageregulatortosupplypowertothemicrocontroller.Theonboardoscillator,coupledwithanexternalcrystalof2.4576MHz,suppliesthemicrocontrollerwithitstimingsignalwhichisdividedinternallybyfourtoyieldaprocessorfrequencyof614.4kHz,whichisanevenmultipleoftheRS232[7]baudrategenerator.InthisSectiontheterm‘supervisedinputoroutput’willbeusedtomeanthatthefunctioninquestionismonitoredforopen-andshort-circuitconditionsinadditiontoitsothernormalfunctions.MoreinformationcanbefoundinReference9.5Mainloop6ConclusionThispaperdescribesthedevelopmentofalargescalefiredetectionandalarmsystemusingmulti-singlechipmicrocomputers.Thearchitectureusedisatwo-levelhierarchyofdecisionmaking.ThisarchitectureismadepossiblebythenewCMOSmicrocontrollerswhichrepresentahighpackingdensityatalowpowerconsumptionyetarepowerfulindataprocessingandthusindecisionmaking.Eachlocalstationcouldmakeanautonomousdecisionifthehigherlevelofhierarchyallowsittodoso.Ithasbeentriedtokeepthesystemdesigningeneralformatsoitcanbeadaptedtovaryingsituations.Aprototypeofthedescribedsystemhasbeenbuiltandtested[10].ThecontrolpartofthecentralstationisimplementedwithadevelopmentcardbasedonMC68000microprocessor(MEX68KECB,byMotorola),whichhasabuilt-inmonitorcalledTutor.Theapplicationprogramsweredevelopedusingthefeaturesprovidedbythismonitor.Thelocalstations’controllersweredesignedusingtheMC68705R3,single-chipmicrocontroller.7References1‘Fireprotectionguidelinesfornuclearpowerplants’,USNRCRegulatoryGuide1.1202BAGCHI,C.N.:‘Amulti-leveldistributedmicroprocessorsystemforanuclearpowerplantfireprotectionsystemcontrols,monitoring,andcommunication’,IEEETrans.,19823PUCILL,P.M.:‘Firehazardprotection,detectionandmonitoringsystems’,Sea.Con,2,ProceedingsofSymposiumonADVinoffshoreandterminalmeasurementandcontrolsystems,Brighton,England,March1979,pp.353-3634HEAVISID,L.:‘Offshorefireandexplosiondetectionandfixedfire’.OffshoreTechnologicalConference,12thAnnualProceedings,Houston,Texas,May1980,pp.509-5225CELLENTANI,E.N.,andHUMPHREY,W.Y.:‘Coordinateddetection/communicationapproachtofireprotection’,Specify:Eng.,6‘MotorolaMicroprocessorsDataManual’(MotorolaSemiconductorProducts,Austin,Texas,USA)7ElectronicIndustriesAssociation:‘Interfacebetweendataterminalequipmentanddatacommunicationequipmentemployingserialbinarydatainterchange’(EIAStandardRS-232,Washington,DC,1969)8MESAROVIC,M.D.,MACKO,D.,TAKAHARA,Y.:‘Theoryofhierarchicalmultilevelsystems’(AcademicPress,1970)9KASSEM,M.:‘Firealarmsystems’,MSc.thesis,Dept.ofElec.&Comp.Eng.,ConcordiaUniversity,Montreal,Canada,198510LIE,P.,andKOTAMARTI,U.:‘Thedesignofafirealarmsystemusingmicroprocessors’,C481Project,Dept.ofElec.andComp.Eng.,ConcordiaUniversity,Montreal,Canada,1986譯文基于單片機(jī)的火災(zāi)探測和監(jiān)控系統(tǒng)A.J.AI-Khalili,MSc,PhDD.AI-Khalili,MSc,PhDM.S.Khassem,MSc關(guān)鍵詞:危險(xiǎn)，設(shè)計(jì)，設(shè)備狀態(tài)監(jiān)測摘要:火災(zāi)探測及報(bào)警監(jiān)控已成為一個(gè)復(fù)雜而完整的體系。該系統(tǒng)采用多個(gè)單芯片架構(gòu)到一條主線上。該控制算法是基于兩級(jí)決策層次，因此分配了復(fù)雜性。一個(gè)完整的電路原理圖，給出了主、分控制器所需的軟件的結(jié)構(gòu)要求。設(shè)計(jì)延續(xù)一般形式，這樣可以適應(yīng)于多種系統(tǒng)的配置。尤其顯示出新的技術(shù)發(fā)展，特別是CMOS單芯片器件，在系統(tǒng)設(shè)計(jì)中的使用，以減少整體硬件的復(fù)雜性，例如，通過分解系統(tǒng)，這樣的層次較低水平的控制器能夠有一些決策自主權(quán)，用簡單的分布式的方法解決了復(fù)雜的決策。1、引言大多數(shù)高風(fēng)險(xiǎn)地區(qū)和建筑物的管理要求安裝火災(zāi)探測報(bào)警系統(tǒng)。多數(shù)國家消防規(guī)范的要求監(jiān)測和控制具體的是危險(xiǎn)場合或建筑物，如化工廠，石油類，核電廠，住宅高樓等這些場合的一般性質(zhì)可以指定為下列要求:(一)所有探測器信號(hào)源信號(hào)能被主處理器準(zhǔn)確識(shí)別。(二)主從控制器有另外的溝通路徑。(三)檢測報(bào)警和主控制設(shè)備由控制中心控制。(四)火災(zāi)現(xiàn)場和控制中心的通訊。(五)提供的應(yīng)急電源。它也被用來應(yīng)對(duì)特殊情況和進(jìn)行深被檢測。火災(zāi)探測及報(bào)警系統(tǒng)是一個(gè)旨在信號(hào)，在一旦發(fā)生火警報(bào)警裝置的組合。該系統(tǒng)也可實(shí)現(xiàn)風(fēng)扇控制，防火門關(guān)閉或釋放，電梯鎖定，應(yīng)急照明控制和其他緊急任務(wù)。這些額外的功能補(bǔ)充由檢測和報(bào)警裝置和中央控制單元組成。技術(shù)對(duì)系統(tǒng)結(jié)構(gòu)有很深的影響。當(dāng)技術(shù)的變革，該架構(gòu)必須修訂，以利用這些新的功能變化。近年來，超大規(guī)模集成電路技術(shù)已經(jīng)大大進(jìn)步。第一，NMOS在過去的一年或兩年，CMOS芯片以相同的堆積密度擁有更多的門和更低的功耗。當(dāng)然這種技術(shù)的變化必然影響在芯片和系統(tǒng)級(jí)我們的硬件設(shè)計(jì)。在芯片級(jí)，單芯片現(xiàn)在正在制作的是只相當(dāng)于上一年或兩年的水平。這些芯片有微處理器，RAM和ROM，IO端口存儲(chǔ)器串行和并行，A/D轉(zhuǎn)換定時(shí)器，和其他功能的芯片。在系統(tǒng)級(jí)，新的芯片做出新的結(jié)構(gòu)成為可能。本文的目的是體現(xiàn)技術(shù)如何影響消防控制領(lǐng)域的系統(tǒng)結(jié)構(gòu)。新的高密度的單芯片微控制器納入一個(gè)大系統(tǒng)的設(shè)計(jì)，但我們可以得到了更好的性能，更小的系統(tǒng)。在火災(zāi)探測和報(bào)警監(jiān)控系統(tǒng)中，這是直接反映在分控制站的硬件，因?yàn)榈靥幤h(yuǎn)和電源的要求。一個(gè)完整的分控制站可以圍繞著一個(gè)帶電源的CMOS芯片設(shè)計(jì)。這種方法降低了成本和設(shè)計(jì)復(fù)雜性，方便實(shí)施和維護(hù)，并提供易于擴(kuò)展和便攜式設(shè)計(jì)。這是舊技術(shù)不可能實(shí)現(xiàn)的。大部分火災(zāi)檢測/監(jiān)測系統(tǒng)提供特定的應(yīng)用程序，缺乏對(duì)CMOS超大規(guī)模集成電路技術(shù)的應(yīng)用。在這項(xiàng)研究中，我們開發(fā)了火災(zāi)檢測/監(jiān)測系統(tǒng)，常規(guī)設(shè)計(jì)，易于執(zhí)行的早期發(fā)現(xiàn)火警。在這里，我們提出一個(gè)中央控制和分發(fā)控制/檢測/充分的溝通，如果使用的單芯片微控制器在分控制站，從而提高可控性和可觀性的監(jiān)測過程。2、檢測和報(bào)警裝置一個(gè)基本的火災(zāi)探測系統(tǒng)由兩部分組成，檢測和報(bào)警。自動(dòng)檢測設(shè)備有比如熱，煙霧或火焰檢測器，紫外線或紅外線探測器或火焰閃爍，是基于檢測一個(gè)燃燒的副產(chǎn)品。煙霧探測器都電離和光類型，是最常用的檢測設(shè)備。當(dāng)這種類型的典型探測器進(jìn)入報(bào)警狀態(tài)產(chǎn)生的電流信號(hào)會(huì)從PA變成MA(比如，從單純的15pA在休眠模式下為60毫安)在主動(dòng)模式。在許多探測器的檢測器輸出電壓明確在各種運(yùn)行條件，例如見表1。越是敏感的檢測器，它更容易受到虛假警報(bào)。為了控制探測器的精確，可使用下列方法:過濾技術(shù)，這樣的邏輯電路成為活躍僅當(dāng)x警報(bào)的時(shí)間內(nèi)檢測周期T。檢測技術(shù)在很大程度上取決于地點(diǎn)和植物受到保護(hù)，煙霧探測器是睡覺的地方，紅外線和紫外線輻射探測器，檢測易燃液體燃燒，熱探測器用于滅火和滅火系統(tǒng)。一般來說，生命和財(cái)產(chǎn)保護(hù)有不同的做法。報(bào)警裝置，從通常的聲響或視覺報(bào)警外，還可以采用固態(tài)的聲音再現(xiàn)和緊急話音通信或打印機(jī)，記錄時(shí)間，日期，地點(diǎn)和其他資料。Heavisid[4]擁有一支優(yōu)秀的審查探測器和滅火器的各種制度。2.1控制理念和分工我們的理念是實(shí)施控制等級(jí)。三個(gè)層次的系統(tǒng)級(jí)的實(shí)施，兩個(gè)級(jí)別的決策。之間沒有設(shè)備，在同一層次的溝通。交互各級(jí)之間發(fā)生了向上的信息傳輸有關(guān)的子系統(tǒng)和向下狀態(tài)轉(zhuǎn)移的命令。這是圖所示。1，其中第1級(jí)是中央控制站，是微機(jī)最終(在不手動(dòng)模式)決策者。第2級(jí)是當(dāng)?shù)乜刂破?，建立在?dāng)?shù)氐恼?。?級(jí)是實(shí)際檢測器和驅(qū)動(dòng)器。在各級(jí)提供手操作模式。所有探測器的數(shù)據(jù)和分處理器是當(dāng)?shù)乜刂频幕A(chǔ)。他們將信息濃縮，并轉(zhuǎn)交中央處理器。信息傳遞的地位始終是單向及以上。命令傳輸是單向的總是向下，并在擴(kuò)大局部控制的水平。這種方法保留了層次的準(zhǔn)確監(jiān)測檢測和嚴(yán)格的規(guī)則高風(fēng)險(xiǎn)的核電站警報(bào)系統(tǒng)。兩個(gè)控制層的分類是基于決策層。(一)在屆時(shí)的決定，提出和決定的執(zhí)行情況不能再拖延(二)決定的不確定性(三)將隔離當(dāng)?shù)氐臎Q定(例如，我們可能會(huì)在當(dāng)?shù)貓?bào)警，但有可能有故障系統(tǒng))3、硬件圖.2描繪了我們的設(shè)計(jì)最簡單的形式。這個(gè)系統(tǒng)采用四個(gè)導(dǎo)體開放的路線，在所有遠(yuǎn)程共享一個(gè)循環(huán)電纜設(shè)備和控制面板。這種方法簡單，經(jīng)濟(jì)上可行。但是，一個(gè)主要缺點(diǎn)是對(duì)一個(gè)單一的電力和信號(hào)電纜的依賴。在重要環(huán)境下，可靠性是極其重要的。固可采用兩個(gè)甚至三個(gè)電纜采取不同的線路連接，可并行連接。圖.3是驅(qū)動(dòng)電路必須得一個(gè)擴(kuò)展總線。采用這種設(shè)計(jì)在單片機(jī)技術(shù)的最新發(fā)展優(yōu)勢減少與中央控制站和地方控制站的接口。3.1中央控制任務(wù)中央站點(diǎn)提供了一個(gè)集中點(diǎn)，以監(jiān)測和控制系統(tǒng)的活動(dòng)。在該系統(tǒng)介紹了中央控制單元的目的(一)它得到了分控制站的信息和控制警鐘及其他輸出設(shè)備。(二)它提示在系統(tǒng)出現(xiàn)故障時(shí)的操作。(三)它提供了一個(gè)全面系統(tǒng)的手動(dòng)和自動(dòng)控制。(四)，它提供了中央和分站的系統(tǒng)測試點(diǎn)。(五)它提供了一個(gè)中心點(diǎn)觀察，學(xué)習(xí)和適應(yīng)。3.2分控制站分控制站的決定可以控制處理當(dāng)?shù)氐男畔?。這種技術(shù)我們就依靠負(fù)載型協(xié)調(diào)下級(jí)單位，承認(rèn)在同一水平上的其他決定單位的存在;中央或高層提供了一個(gè)較低的單位模型之間的行動(dòng)和系統(tǒng)響應(yīng)的關(guān)系。很明顯，一個(gè)強(qiáng)大的機(jī)器，需要在這個(gè)階段，使所有需要的功能得到有效執(zhí)行。該芯片的新一代供應(yīng)使得該體系結(jié)構(gòu)的解決變得可行。單片機(jī)被選中了離散的數(shù)字和模擬設(shè)備接口，到外地設(shè)備和中央微機(jī)。這是最主要的原因，以前這種做法是不可行的。該芯片的選擇的，包含要求的模擬和數(shù)字接口所需的端口和CMOS技術(shù)的運(yùn)用，由于地處偏僻的分控制站最一體化。這個(gè)選擇是摩托羅拉68HC11A4，理由如下:(1)它是CMOS技術(shù)，這可減少電力消耗。(2)它有一個(gè)UART，這有利于串行通信。(3)它有一個(gè)A/D轉(zhuǎn)換器上，這消除了外部A/D轉(zhuǎn)換(4)它有一個(gè)4K的ROM，256K內(nèi)存，512KEERROM字節(jié)40個(gè)I/O端口的線路和一個(gè)16位定時(shí)器;符合分控制站所有的內(nèi)存和1/0的要求。4、系統(tǒng)實(shí)施分控制站:圖.3是用于一個(gè)遠(yuǎn)程火災(zāi)報(bào)警MC68HCllA4電路框圖檢測電路:圖.4這