资源描述：
《外文翻译---一种基于ds18b20的温度探测系统》由会员上传分享，免费在线阅读，更多相关内容在学术论文-天天文库。
1、附录ⅢADesignoftheTemperatureTestSystemBasedonGroupingDS18B20AbstractAlltheDS18B20sensors,usedforthemultipointtesttemperature,areconnectedwithMCUononeofIObus,andtemperaturedataarecollectedbyturns.Ifthesystemhasalargeamountofsensors,thetimeofMCUusedinprocessingthetemper
2、aturedataisobviouslyprolonged,sothecycleofalternatetestgetslonger.Inthispaper,anewmethodthatDS18B20arerationallygroupedispresented,andsomemeasuresaretakeninsoftware;asaresult,thespeedofalternatetestadvancesdistinctly.Keywords-DS18B20Group,temperaturetest,timespenton
3、thealternatetest.1.INTRODUCTIONAsthesimplestructure,convenientinstallment,lowlossandwiderangeoftemperaturetest,DS18B20temperaturetestsensorsareappliedtothefieldswhichneedthemultipointtemperaturetest,suchasthechemicalindustry,thegrain,theenvironmentsupervisionandsoon
4、.BecauseoftheadoptionofonebusintheDS18B20multipointtemperaturetestsystem,allDS18B20arehungononebus,andthenthetemperatureconversionvalueofeachtestpointisreadbyturns.Astheconversionvaluemustbereadafterreading-pinstatefor8times,andpositionandstoredatamustbemoved,sotime
5、spendmuchinreadingonepointofthedatasystembyeverytime.Ifthetemperaturetestsystemislarge-scaled,thesystemlosscausedbyitisrathermuch,andthenthealternatetestspeedofthesystemdecreasesobviously,whichinfluencestheefficiencyofthemultipointtemperaturetestsystemseriously.Inth
6、ispaper,DS18B20arehungonsomeI/ObusesbygroupingDS18B20evenly,andtheconversiontemperaturedataisobtainedbyreadingthestateofDS18B20,thenthesystemlossdecreasesandthealternatetestspeedincreasesobviously,whichwon’tinfluencetheprecisionandthereliabilityoftheconversion.Aseto
7、fmultipointtemperaturetestofartificialenvironmentlaboratoryisachievedinthispaper,whichincreasesthetestefficiencyoftheformersystem.2.CHARACTERISTICSOFDS18B20DS18B20isthesinglebusdigitaltemperaturesensorfromAmericanDallasCompany.DS18B20isconsistedofthe64figuresROMengr
8、avedbylaser,thetemperaturesensitivitycomponent,non-volatiletemperaturealarmstrigger(DeviceTHandTL).DS18B20communicateswiththemicroprocesso
