华南农业大学试卷_automotivesensors.doc

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1、......华南农业大学期末考试试卷（A卷）2015年第秋季学期考试科目：　AutomotiveSensors　考试类型：（开卷）考试　　　考试时间：　120　分钟学号姓名年级专业题号一二三四五总分得分评阅人1Fillintheblanks（20%）1)Measuringprincipleofnon-contactingtemperaturemeasurementis__inusewhichmeasurethemedium’stemperaturebymeansofitsthermalradiation________,andonesensortypeexampleofiti

2、s_Bolometer_____________.Seebeckeffectmeans__the_productionofanelectriccurrentinacircuitcontainingjunctionsbetweendifferentmetalsorsemiconductorskeptatdifferenttemperatures______________.2)Sensorandmeasuringprincipleswhichonlymeasureminuteshifts/movementsareusedtomeasurevariablessuchas_Eddy

3、-currentsensors__________and_Hellasensors____________________.Ashort-circuiting-ringsensorcanbeusedtomeasure__thecontroll-racksettingonin-linedieselinjectionpumps_______;Arainsensorisusedto__detectfineraindropsonthewindshield_____________.3)“Piezoelectriceffect”means__Electricchargesareindu

4、cedonthecrystalsurfacebyexertingacompressionroelongationforcealongcertaincrystalaxes.________and“reversepiezoelectriceffect”means_thepositiveionsintheelectricfieldmigratetowardthenegativeelectrode,and_negativeionstowardthepositiveelectrode.Thecrystalthencontractsorexpandsdependingonthedirec

5、tionoftheelectricfieldstrength______.4)Forspeedsensors,normallypassiverotorsareintheformof__gearwheels_______________.Foraninductiveengine-speedsensortwovariablearemeasuredatthesametime:___enginerpm_______and___crankshaftpositive______.5)“Yawrate”refersto_thevehiclerotationaboutits学习参考.....

6、.verticalaxis__________.Itismeasuredusing_piezoelectric“tuning-fork”yaw-ratesensor_________,andthistypeofsensornormallyworksontheprincipleof____yaw-rategyroscope____________________.6)Oneexemplaryuseofmicrobendingeffectoffiber-opticsensoris:__providingfingerprotectionforelectricpowerwindows

7、andslidingsunroofs__________,andtheprincipleis__thatthelightinanopticalfiberisattenuatedproportionallytothecorrugateddistortionontheapplicationofaforceFtransversetothefiber,independentlyofwheretheforceisappliedorwhetheritisactingatapointorisdistributed._