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1、MEASUREMENTOFTEMPERATUREANDHUMIDITYUSINGSHT11/71INTELLIGENTSENSORAssist.Prof.GrishaSpasov,PhD,BScNikolayKakanakovDepartmentofComputerSystems,TechnicalUniversity–branchPlovdiv,25,“TzankoDjustabanov”Str.,4000Plovdiv,Bulgaria,+35932659576,e-mail:gvs@tu-plovdiv.bg,kakanak@tu-plovdiv.bgKeywords:tempera
2、tureandhumiditymeasurements,intelligentsensors,distributedautomationandcontrolThepaperdiscussestheadvantagesofintelligentsensors.ItpresentsanSHT11/71temperatureandhumiditycombinedsensorfromSensirion.Thissensorisidealfordevelopingdistributedembeddedsystemsformonitoringenvironmentalparameters.Anexam
3、pleapplicationusingthissensorisaddedtopresentSHT11/71inrealworkingcondition.Theapplicationisdistributedsystemformonitoringtemperatureandhumidity.Itusesamicrocontrollerwithintegratedwebservertoorganizethecommunicationandmanagementofsensors.Thisapplicationisrealizedandtested.1.INTRODUCTIONMeasuremen
4、tandcontroloftemperatureandrelativehumidityhassignificantapplianceinindustry,science,healthcareagricultureandcontrollingtechnologicalprocesses.Thesetwoenvironmentalparametersstronglyinfluenceeachotheranditiscriticalinsomeapplicationtomeasuretheminparallel.Usingmoderntechnologiesitispossibletocombi
5、netemperaturemeasurementelement,humiditymeasurementelement,amplifier,ADC,digitalinterface,calibrationmemoryandCRCcalculationlogicinasinglechipwithverysmallsize[1,3].Usingintelligentsensorsofthiskindcanshortenthedevelopmenttimeandcost.IntegratingADCandamplifierintosensor’schipallowdeveloperstooptim
6、izesensorelementsforaccuracyandlong-termstability.Andthatisnotall–integratingdigitalinterfacelogicsimplifiesconnectivityandmanagementofsensors.Theseadvantagescanreducewholetime-to-markettimeandevenprice[1,3].InpresentedpaperweuseSHT11/71intelligentsensorfromSensirionasanexampleandpresentitsadvanta
7、gesandmeasurementprocedures.Anexampleapplicationisalsopresentedtodemonstrateitsworkinrealconditions.Thisapplicationisrealizedandtested.2.INTELIGENTSENSORS–SHT11/71SHT11/71isasinglechiprelativehumidityandtemperatu
