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ID:4098851
大小:578.54 KB
页数:11页
时间:2017-11-28
《湿度传感器系统毕业论文中英文资料外文翻译文献》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、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,itisimportanttoknowandtobeabletojudgethedecidingfactors.I
2、nadditiontolong-termstability,whichisameasureonhowmuchasensorchangesitspropertiesovertime,thesefactorsalsoincludethemeasurementaccuracyandtheresponsecharacteristicsofthesensor.Capacitivehumiditysensorsarebasedontheprinciplethatahumidity-sensitivepolymerabsorbsorreleasesmoistureasafunctio
3、noftherelativeambienthumidity.Becausethismethodisonlyaspotmeasurementatthesensorlocation,andusuallythehumidityofthesurroundingsisthedesiredquantity,thesensormustbebroughtintomoistureequilibriumwiththesurroundingstoobtainaprecisemeasurementvalue.Thisprocessisrealizedbyvarioustransportphen
4、omena(cf.thesectiontitled"Thehousingeffectontheresponsetime"),whichexhibitatimeconstant.Accuracyandresponsetimearethuscloselydependentoneachother,andthedesignofahumiditymeasurementsystembecomesachallenge.2MeasurementaccuracyThetermmeasurementaccuracyofahumiditysensorisunderstoodprimarily
5、torefertothedeviationofthevaluemeasuredbythesensorfromtheactualhumidity.Todeterminethemeasurementaccuracy,references,suchaschilledmirrorhygrometers,whoseowntolerancemustbetakenintoaccount,areused.Inadditiontothistrivialcomponent,humiditysensorsrequireagiventimeforreachingstablehumidityan
6、dtemperatureequilibrium(thehumidityisafunctionoftemperatureanddecreaseswithincreasingtemperature;adifferencebetweensensorandambienttemperatureleadstomeasurementerrors).Thisresponsetimethushasasignificanteffectonthevaluemeasuredbythesensorandthusonthedetermined10吉林农业大学本科毕业设计accuracy.Thist
7、ime-dependentcharacteristicisexplainedinmoredetailinthefollowing.3ResponsecharacteristicsandresponsetimeTheresponsecharacteristicsaredefinedbyvariousparameters.Theseare:lTheactualresponsecharacteristicsofthehumiditysensoratconstanttemperature.(1)Howquicklythesensitivepoly
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