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1、北京化工大学北方学院毕业设计（论文）——外文文献原稿和译文外文文献原稿和译文原 稿Multiplesingle-chipmicrocomputerapproachtofiredetectionandmonitoringsystemA.J.AI-Khalili,MSc,PhDD.AI-Khalili,MSc,PhDM.S.Khassem,MScIndexingterm:Hazards,Design,PlantconditionmonitoringAbstract:Acompletesystemforfiredetectionandalarmmonitoringhasbeenproposedfo
2、rcomplexplants.Thesystemusesmultiplesinglechiparchitectureattachedtoapartyline.Thecontrolalgorithmisbasedonatwo-levelhierarchyofdecisionmaking,thusthecomplexityisdistributed.Acompletecircuitdiagramisgivenforthelocalandthecentralstationwithrequirementsforthesoftwarestructure.Thedesigniskeptingeneralf
3、ormsuchthatitcanbeadaptedtoamultitudeofplantconfigurations.Itisparticularlyshownhownewdevelopmentsintechnology,especiallyCMOSsinglechipdevices,areincorporatedinthesystemdesigntoreducethecomplexityoftheoverallhardware,e.g.bydecomposingthesystemsuchthatlowerlevelsofhierarchyareabletohavesomeautonomyin
4、decisionmaking,andthusamorecomplexdecisionissolvedinasimpledistributedmethod.1IntroductionRegulatoryrequirementsformosthighriskplantsandbuildingsmandatetheinstallationoffiredetectionandwarningsystemsforallsensitiveareasoftheplantorthe20北京化工大学北方学院毕业设计（论文）——外文文献原稿和译文building.Mostfirecodesstatetherequi
5、rementformonitoringandcontrolspecificallyrelatedtoatypeofaplantorbuildingsuchaschemicalplants,petroleum,nuclearplants,residentialhigh-risesetc.Ageneralconclusionofthesecodescanbespecifiedasthefollowingrequirements:(a)Thesourceofalldetectorsignalsshouldbeexactlyidentifiablebythecentralstation(b)Anext
6、rapathofcommunicationbetweenthecentralstationandalllocalcontrollers(c)Directmeansofcontrolofalarmandcentralequipmentbythecentralstation(d)Meansofcommunicationbetweenthecentralstationandthefiredepartment(e)Availabilityofemergencypowersupply.Thecodesusuallyalsospecifythetypesandfrequencyoftestsforalle
7、quipment.Afiredetectionandalarmsystemisacombinationofdevicesdesignedtosignalanalarmincaseofafire.Thesystemmayalsoaccomplishfancontrol,firedoorholdorrelease,elevatorrecall,emergencylightingcontrolandot
