華南農(nóng)業(yè)大學(xué)試卷-automotive-sensors

1、1華南農(nóng)業(yè)大學(xué)期末考試試卷（華南農(nóng)業(yè)大學(xué)期末考試試卷（A卷）卷）2015年第年第秋季秋季學(xué)期學(xué)期考試科目：考試科目：AutomotiveSenss考試類型：（開卷）考試考試類型：（開卷）考試考試時(shí)間：考試時(shí)間：120分鐘分鐘學(xué)號(hào)姓名年級(jí)專業(yè)題號(hào)題號(hào)一二三四五總分總分得分得分評(píng)閱人評(píng)閱人1Fillintheblanks（20%）1)Measuringprincipleofnoncontactingtemperaturemeasuremen

2、tis__inusewhichmeasurethemedium’stemperaturebymeansofitsthermalradiation________onesenstypeexampleofitis_Bolometer_____________.Seebeckeffectmeans__the_productionofanelectriccurrentinacircuitcontainingjunctionsbetweendif

3、ferentmetalssemiconductskeptatdifferenttemperatures______________.2)Sensmeasuringprincipleswhichonlymeasureminuteshiftsmovementsareusedtomeasurevariablessuchas_Eddycurrentsenss___________Hellasenss____________________.As

4、htcircuitingringsenscanbeusedtomeasure__thecontrollracksettingoninlinedieselinjectionpumps_______Arainsensisusedto__detectfinerainsonthewindshield_____________.3)“Piezoelectriceffect”means__Electricgesareinducedonthecrys

5、talsurfacebyexertingacompressionroelongationfcealongcertaincrystalaxes.________“reversepiezoelectriceffect”means_thepositiveionsintheelectricfieldmigratetowardthenegativeelectrode_negativeionstowardthepositiveelectrode.T

6、hecrystalthencontractsexpsdependingonthedirectionoftheelectricfieldstrength______.4)Fspeedsenssnmallypassiverotsareinthefmof__gearwheels_______________.Faninductiveenginespeedsenstwovariablearemeasuredatthesametime:___en

7、ginerpm__________crankshaftpositive______.5)“Yawrate”refersto_thevehiclerotationaboutitsverticalaxis__________.Itismeasuredusing_piezoelectric“tuningfk”yawratesens_________thistypeofsensnmallywksontheprincipleof____yawra

8、tegyroscope____________________.3應(yīng)電流稱為電渦流，這種現(xiàn)象稱為電渦流效應(yīng)。AccdingtoFaradayslawwhenthemetalconductisinthechangingmagicfieldthesurfaceoftheconductwillgenerateinducedcurrent.Currentflowinthemetalbodywillbeclosedonitsowntheswirl

9、inginducedcurrentproducedbyelectromagicinductionprincipleisknownaseddycurrentthisphenomenoniscallededdycurrenteffect.P2872)SeeFig.2onpage341.ExplaintheprincipleofthismicromechanicalaccelerationsensP3403)SeeFig.3(a)onpage

10、261.Explainwhythisarrangementisinsensitivetoairgapfluctuations.P2614QuestionsAnalysesusingyourownwds(30%)1)AnalyzeFig.25onpage249togetherFig.27onpage250.Whydoyouthinkthebarberpolesensmentionedhereiscalled“differentialsen

11、s”2)AnalyzeFig.1onpage271.Thenanswer:i)OnwhatconditionscanthevariablexinFig.(a)beusedtorepresentthemeasuredvariableofaccelerationaii)Whydoesthemethod(crespondingto(b)inthisFig.)hasahigherlimitfrequency因?yàn)锽中方法消除了質(zhì)量塊的物理運(yùn)動(dòng)所以