湿度传感器系统精度及响应特性的优化-外文文献翻译

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1、英文:TherightdesignforarelativehumiditysensorsystemOptimizingtheresponsecharacteristicsandaccuracyofahumiditysensorsystem1OverviewTomaketherightchoicewhenselectingarelativehumiditysensorforanapplication,itisimportanttoknowandtobeabletojudgethedecidingfactors.Inadditiontolong-termsta

2、bility,whichisameasureonhowmuchasensorchangesitspropertiesovertime,thesefactorsalsoincludethemeasurementaccuracyandtheresponsecharacteristicsofthesensor.Capacitivehumiditysensorsarebasedontheprinciplethatahumidity-sensitivepolymerabsorbsorreleasesmoistureasafunctionoftherelativeam

3、bienthumidity.Becausethismethodisonlyaspotmeasurementatthesensorlocation,andusuallythehumidityofthesurroundingsisthedesiredquantity,thesensormustbebroughtintomoistureequilibriumwiththesurroundingstoobtainaprecisemeasurementvalue.Thisprocessisrealizedbyvarioustransportphenomena(cf.

4、thesectiontitled"Thehousingeffectontheresponsetime"),whichexhibitatimeconstant.Accuracyandresponsetimearethuscloselydependentoneachother,andthedesignofahumiditymeasurementsystembecomesachallenge.2MeasurementaccuracyThetermmeasurementaccuracyofahumiditysensorisunderstoodprimarilyto

5、refertothedeviationofthevaluemeasuredbythesensorfromtheactualhumidity.Todeterminethemeasurementaccuracy,references,suchaschilledmirrorhygrometers,whoseowntolerancemustbetakenintoaccount,areused.Inadditiontothistrivialcomponent,humiditysensorsrequireagiventimeforreachingstablehumid

6、ityandtemperatureequilibrium(thehumidityisafunctionoftemperatureanddecreaseswithincreasingtemperature;adifferencebetweensensorandambienttemperatureleadstomeasurementerrors).Thisresponsetimethushasasignificanteffectonthevaluemeasuredbythesensorandthusonthedeterminedaccuracy.Thistim

7、e-dependentcharacteristicisexplainedinmoredetailinthefollowing.3ResponsecharacteristicsandresponsetimeTheresponsecharacteristicsaredefinedbyvariousparameters.Theseare:lTheactualresponsecharacteristicsofthehumiditysensoratconstanttemperature.(1)Howquicklythesensitivepolymerabsorbso

8、rreleasesmoistureuntilequilibrium