08湿度传感器系统毕业论文中英文资料外文翻译文献

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1、吉林农业大学本科毕业设计湿度传感器系统中英文资料外文翻译文献英文:TherightdesignforarelativehumiditysensorsystemOptimizingtheresponsecharacteristicsandaccuracyofahumiditysensorsystem1OverviewTomaketherightchoicewhenselectingarelativehumiditysensorforanapplication,itisimportanttoknowandtobeabletojudgethedecidingfactor

2、s.Inadditiontolong-termstability,whichisameasureonhowmuchasensorchangesitspropertiesovertime,thesefactorsalsoincludethemeasurementaccuracyandtheresponsecharacteristicsofthesensor.Capacitivehumiditysensorsarebasedontheprinciplethatahumidity-sensitivepolymerabsorbsorreleasesmoistureasaf

3、unctionoftherelativeambienthumidity.Becausethismethodisonlyaspotmeasurementatthesensorlocation,andusuallythehumidityofthesurroundingsisthedesiredquantity,thesensormustbebroughtintomoistureequilibriumwiththesurroundingstoobtainaprecisemeasurementvalue.Thisprocessisrealizedbyvarioustran

4、sportphenomena(cf.thesectiontitled"Thehousingeffectontheresponsetime"),whichexhibitatimeconstant.Accuracyandresponsetimearethuscloselydependentoneachother,andthedesignofahumiditymeasurementsystembecomesachallenge.2MeasurementaccuracyThetermmeasurementaccuracyofahumiditysensorisunderst

5、oodprimarilytorefertothedeviationofthevaluemeasuredbythesensorfromtheactualhumidity.Todeterminethemeasurementaccuracy,references,suchaschilledmirrorhygrometers,whoseowntolerancemustbetakenintoaccount,areused.Inadditiontothistrivialcomponent,humiditysensorsrequireagiventimeforreachings

6、tablehumidityandtemperatureequilibrium(thehumidityisafunctionoftemperatureanddecreaseswithincreasingtemperature;adifferencebetweensensorandambienttemperatureleadstomeasurementerrors).Thisresponsetimethushasasignificanteffectonthevaluemeasuredbythesensorandthusonthedetermined10吉林农业大学本科

7、毕业设计accuracy.Thistime-dependentcharacteristicisexplainedinmoredetailinthefollowing.3ResponsecharacteristicsandresponsetimeTheresponsecharacteristicsaredefinedbyvariousparameters.Theseare:lTheactualresponsecharacteristicsofthehumiditysensoratconstanttemperature.(1)Howquicklythesensitiv

8、epoly