分布式温度检测-毕业论文外文翻译

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1、英文文献1．英文部分FEATURESUnique1-WireinterfacerequiresonlyoneportpinforcommunicationEachdevicehasaunique64-bitserialcodestoredinanonboardROMMulti-dropcapabilitysimplifiesdistributedtemperaturesensingapplicationsRequiresnoexternalcomponentsCanbepoweredfromdataline.Powersupplyrangeis3.0Vto5

2、.5VMeasurestemperaturesfrom–55°Cto+125°C(–67°Fto+257°F)0.5Caccuracyfrom–10°Cto+85°CThermometerresolutionisuser-selectablefrom9to12bitsConvertstemperatureto12-bitdigitalwordin750ms(max.)User-definablenonvolatile(NV)alarmsettingsAlarmsearchcommandidentifiesandaddressesdeviceswhosetem

3、peratureisoutsideofprogrammedlimits(temperaturealarmcondition)Availablein8-pinSO(150mil),8-pinSOP,and3-pinTO-92packagesSoftwarecompatiblewiththeDS1822Applicationsincludethermostaticcontrols,industrialsystems,consumerproducts,thermometers,oranythermallysensitiveDESCRIPTIONTheDS18B20

4、DigitalThermometerprovides9to12–bitcentigradetemperaturemeasurementsandhasanalarmfunctionwithnonvolatileuser-programmableupperandlowertriggerpoints.TheDS18B20communicatesovera1-Wirebusthatbydefinitionrequiresonlyonedataline(andground)forcommunicationwithacentralmicroprocessor.Ithas

5、anoperatingtemperaturerangeof–55°Cto+125°Candisaccurateto0.5℃overtherangeof–10°Cto+85°C.Inaddition,theDS18B20canderivepowerdirectlyfromthedataline(“parasitepower”),eliminatingtheneedforanexternalpowersupply.EachDS18B20hasaunique64-bitserialcode,whichallowsmultipleDS18B20stofunction

6、onthesame1–wirebus;thus,itissimpletouseonemicroprocessortocontrolmanyDS18B20sdistributedoveralargearea.ApplicationsthatcanbenefitfromthisfeatureincludeHVACenvironmentalcontrols,temperaturemonitoringsystemsinsidebuildings,equipmentormachinery,andprocessmonitoringandcontrolsystems.OV

7、ERVIEWFigure1showsablockdiagramoftheDS18B20,andpindescriptionsaregiveninTable1.The64-bitROMstoresthedevice’suniqueserialcode.Thescratchpadmemorycontainsthe2-bytetemperatureregisterthatstoresthedigitaloutputfromthetemperaturesensor.Inaddition,thescratchpadprovidesaccesstothe1-byteup

8、perandloweralarmtriggerreg