目錄：Chapter1AnoverviewofmeasurementChapter2StandardsandDimensionalUnitsofMeasurementChapter3AssessingandPresentingExperimentalChapter4TheAnylogMeasurandTime-DependentChararcteristicsVChapter5TheResponseofMeasuringSystemsChapter6SensorsChapter7SignalconditioningChapter8Modernsignalprocessing第1題Ameasurementvalueisbetterthannothing.第2題Thereisnoperfectanswer,noperfectmeasure.第3題Majorityoftransducersinuseconvertthemechanicalinputintoananalogouselectricalform.第4題Single-pointcalibrationworkswhentheoutputisnotsimplyproportional.第5題Theprocessortheactofmeasurementconsistsofobtainingaquantitativecomparisonbetweena____andameasurand.正確答案：:predefinedstandard第6題Typicalquantitieswithinthescopeofmechanicalmeasurementsare____,____,____,____、____、____、____.正確答案：:length正確答案：:time正確答案：:temperature正確答案：:weight正確答案：:strain正確答案：:velocity正確答案：:acceleration第7題FoundmentalMethodsofMeasurementare____,____.正確答案：:directcomparison正確答案：:indirectcomparison第8題Mostmeasuringsystemsfallwithintheframeworkofageneralarrangementconsistingofthreephasesorstages:____stage,____stage,____stage.正確答案：:sensor-transducer正確答案：:signal-conditioning正確答案：:readout-recording第9題An____canincreaseeitheramplitudeorpowerofthesignal,orboth,tothelevelrequiredtodrivethefinalterminatingdevice.正確答案：:amplifier第10題Anacceleration-timesignalcanbetransferredtoavelocity-timerelationbyan____.正確答案：:integrator第11題Therearetwokindsofnonrepetitiveortransientsignal:____,____.正確答案：:Singlepulseoraperiodic正確答案：:Continuingorrandom第12題____procedurecanhelptoestablishesthecorrectoutputscaleforthemeasuringsystem.正確答案：:calibration第13題Theprocessortheactofmeasurementconsistsofobtainingaquantitativecomparisonbetweena____andameasurand.正確答案：:predefinedstandard第14題Theprocessortheactofmeasurementconsistsof____betweenapredefinedstandardandameasurand.正確答案：:obtainingaquantitativecomparison第15題Thewordmeasurandisusedtodesignatetheparticular____beingobservedandquanlified;thatis,theinputquantitytothemeasuringprocess.正確答案：:particularphysicalparameter第16題Thestandardofcomparisonmustbeofthesame____asthemeasurand,andusually,butnotalways,isprescribedanddefinedbya____.正確答案：:character正確答案：:legalorrecognizedagencyororganization第17題Namethreestandardizationorganizationsyouknow,____,____,____.____.正確答案：:ISO正確答案：:CNIS正確答案：:NIST正確答案：:ANSI第18題Typicalquantitieswithinthescopeofmechanicalmeasurementsare____,____,____,____.____.____.____.正確答案：:length正確答案：:time正確答案：:temperature正確答案：:weight正確答案：:strain正確答案：:velocity正確答案：:acceleration第19題Tobeuseful,measurementmustbe____and____.正確答案：:reliable正確答案：:valid第20題____

referstotheconsistencyofameasure.正確答案：:Reliability/Precision第21題____

istheextenttowhichthescoresfromameasurerepresentthevariabletheyareintendedto.正確答案：:Validity/accuracy第22題FoundmentalMethodsofMeasurementare____,____正確答案：:directcomparison正確答案：:indirectcomparison第23題Lengthmeasurementusingatapeisa____comparison正確答案：:direct第24題sensor-transducerstageshouldbe____toeveryotherpossibleinput正確答案：:insensitive第25題Unwantedsensitivityisameasuringerror,called____whenitvariesrapidlyand____whenitvariesveryslowly.正確答案：:noise正確答案：:drift第26題thesignal-conditioningstagemayperformoneormorebasicoperations,suchas____,____,____,____,____asmayberequired.正確答案：:filtering正確答案：:amplifiering正確答案：:integration正確答案：:differentiation正確答案：:telemetering第27題Thereadout-recordingstagepresentedinoneofthefollowingformsl:____,____正確答案：:arelativedisplacement正確答案：:digitalform第28題Tiregageconsistsofacylinderandpiston,aspringresistingthepistonmovement,andastemwithscaledivisions.thepiston-cylindercombinationconstitutesaforce-summingapparatus,sensingandtransducing____to____,thespringconvertsthe____to____.正確答案：:pressure正確答案：:force正確答案：:force正確答案：:displacement第29題Mechanicalquantities,inadditiontotheirinherentdefiningcharacteristics,maybeclassifiedas____,____正確答案：:static正確答案：:dynamic第30題Therearetwokindsofnonrepetitiveortransientsignal:____,____正確答案：:Singlepulseoraperiodic正確答案：:Continuingorrandom第1題Themodernmetreis().Athelengthofthepathtravelledbylightinvacuumduringatimeintervalof1/29,97,92,458ofasecondB16,50,763.73×wavelengthsofthered–orangeradiationofakrypton86atominvacuumCthelengthofthepathtravelledbylightinvacuumduringatimeintervalof1/399,792,458ofasecondD1,660,793.73×wavelengthsoftheredorangeradiationofakrypton86atominvacuum第2題Theaimofcalibrationisto().AmeetcustomerrequirementBdetectdeteriorationofaccuracyCcomplywithISO9000standardrequirementsDpractisemeasurementprocedures第3題Conformityofaphysicalquantitytothenationalstandardofmeasurementisknownas().AcalibrationBtraceabilityCsensitivityDrepeatability第4題Thedimensionalunitisthebasisforquantificationoftheentity.第5題ThepermanentofficeofTheOrganisationInternationaleDEMetrologieLegale-OIMLisBIPM,basedinParis,France.第6題RankineistheSIunitfortemperature.第7題Alltheseconddimensionsandunitscanbederivedascombinationsofprimarydimensions.第8題Aphysicalstandardisanartifact.第9題Thenumberofrelevantorusefuldigitsinameasurementshouldberestricted.第10題4.00×10^3has4significantdigits.第11題Therearetwoprimaryunitsystemsinusetoday:____,____.正確答案：:theInternationalSystemofUnits正確答案：:theEnglishEngineeringSystemofUnits第12題Thesevendimensionalsystemincludes____,____,____,____,____,____,____.正確答案：:length正確答案：:mass正確答案：:time正確答案：:electriccurrent正確答案：:thermodynamictemperature正確答案：:luminousinternsity正確答案：:mole第13題Thereviseddefinitionsisbasedonseven____.正確答案：:physicalconstants第14題第15題Becausedifferentsystemsofunitsexist,themethodof____fromsystemtosystemmustbemutuallyagreedupon.正確答案：:conversion第16題ifthecalibrationistobemeaningful,theknowninputmustitselfbederivedfroma____.正確答案：:definedstandard第17題Single-pointcalibrationcanbeusedwhentheoutputis____totheinput.正確答案：:proportional第18題____calibrationsareusedtoimprovestheaccuracyofthecalibration正確答案：:multipoint第19題Theunitsystem,meansnotonlytheestablishmentof____,butalsotheagreementonthe____.正確答案：:unitstandard正確答案：:basisforconversion第20題Thedimensionalunitisthebasisforquantificationoftheentity第21題Therearetwoprimaryunitsystemsinusetoday:____,____正確答案：:theInternationalSystemofUnits正確答案：:theEnglishEngineeringSystemofUnits第22題TheInternationalSystemofUnits,SIsystemwasaproductoftheFrenchRevolution.第23題1971,the14thconferenceaddedthe____astheunitforamountof____,completingthesevendimensionalsysteminusetoday.正確答案：:mole正確答案：:substance第24題ThepermanentofficeofTheOrganisationInternationaleDEMetrologieLegale-OIMLisBIPM,basedinParis,France第25題RankineistheSIunitfortemperature第26題Allotherdimensionsandunitscanbederivedascombinationsofthesesevendimensions.第27題Astandardcanbe().Aanartifact(prototype)BanaturalphenomenonCastandardizedprocedureofmeasurementusingstandardizedmeasurementmethodsandequipmentDAboveall第28題The____standardispreservedunderthemostcarefulconditionsandimprovedinanationalinstituteofstandardsandtechnology.正確答案：:primary第29題The____standardiscomparedatregularintervalswithprimaryStandsandrecordstheir____.正確答案：:secondary正確答案：:deviation第30題Themodernmetreis______.Athelengthofthepathtravelledbylightinvacuumduringatimeintervalof1/29,97,92,458ofasecondB16,50,763.73×wavelengthsofthered–orangeradiationofakrypton86atominvacuumCthelengthofthepathtravelledbylightinvacuumduringatimeintervalof1/399,792,458ofasecondD1,660,793.73×wavelengthsoftheredorangeradiationofakrypton86atominvacuum第31題TheaimofcalibrationistoAmeetcustomerrequirementBdetectdeteriorationofaccuracyCcomplywithISO9000standardrequirementsDpractisemeasurementprocedures第32題ConformityofaphysicalquantitytothenationalstandardofmeasurementisknownasAcalibrationBtraceabilityCsensitivityDrepeatabilityExercise第1題Whenasetofreadingsofameasurementhasawiderange,itindicatesAhighprecisionBhighaccuracyClowprecisionDlowaccuracy第2題ThedifferencebetweenthelowerandhighervaluesthataninstrumentisabletomeasureiscalledAaccuracyBsensitivityCrangeDerror第3題Whendeterminingtheuncertaintyforaparticularmeasurementdevice,thecommonuncertaintyfactorsthatshouldbeincludedareAerrorsinthemeasurementtechniqueandmethodBrandomvariabilityofthemeasurementprocessCtechnician’serrorDallofthese第4題ThebeststandardcharacteristicwhencalibratinganinstrumentforproductioninspectionisAtentimestheaccuracyBnewandseldomusedsincecalibrationCpermanentlyassignedtothisparticularinstrumentDusingastandardsimilarinsize,shape,andmaterial,withpartbeingmeasured第5題Interpretationofrepeatedmeasurementresultsonthesamefeatureisconsideredtheinstrument’sAaccuracyBprecisionCsensitivityDrange第6題AccuracyisdefinedasAameasureofhowoftenanexperimentalvaluecanberepeatedBtheclosenessofameasuredvaluetotherealvalueCthenumberofsignificantfiguresusedinameasurementDnoneofthese第7題Whenaseriesofrepeatedmeasurementsthataremadeonacomponentundersimilarconditionsareplotted,itfollowsAlog-normaldistributionBWeibulldistributionCbinomialdistributionDGaussiandistribution第8題RandomerrorscanbeassessedAexperimentallyBbyperformingsensitivityanalysisCstatisticallyDempirically第9題HysteresisofaninstrumentaffectsitsAresolutionBaccuracyCrepeatabilityDzerostability第10題LoadingeffectmeansAeffectoftheappliedloadontheinstrumentBimpactoftheappliedloadontheaccuracyoftheinstrumentCcapabilityoftheinstrumenttowithstandtheappliedloadDincapabilityoftheinstrumenttomeasurethemeasurandinanundistortedform第11題Whichoneofthefollowingisnotadynamiccharacteristic?ADriftBSpeedofresponseCMeasuringlagDFidelity第12題Manyinstrumentsdonotreproducethesamereadingirrespectiveofwhetherthemeasurementshavebeenobtainedinanascendingoradescendingorder.ThisisduetoAlinearityerrorBdrifterrorCsystematicerrorDhysteresis第13題Fidelityisa/anAstaticcharacterBdynamiccharacterCneitherastaticnoradynamiccharacterDundesirableerror第14題Themaximumdeviationoftheoutputofameasuringsystemfromaspecifiedstraightline,appliedtoaplotofdatapointsonacurveofthemeasuredvaluesversusthemeasuredvaluesiscalledAlinearityBthresholdCmeasurementlagDresolution第15題第16題第17題第18題Theerrorofameasurementisthusdefinedasthedifferencebetweenthe____valueandthe____valueofthequantity.正確答案：:measured正確答案：:truephysical第19題Themeasuredvalueanderrorcanbeknownexactly第20題Andmosterrorscanbeplacedintooneoftwogeneralclasses:____and____正確答案：:biaserrors正確答案：:precisionerrors.第21題____,alsoreferredtoassystematicerrors,areconsistent,repeatableerrors.正確答案：:biaserrors第22題Precisionerrors,alsocalled____,arecausedbyalackofrepeatabilityintheoutputofthemeasuringsystem.正確答案：:randomerrors第23題Typicalcalibrationerrorsmaybe____errors,whichcauseallreadingstobeoffsetbyaconstantamountoffset.or____errorsintheslopeoftheoutputrelativetotheinputwhichcauseallreadingstoerrbyafixedpercentage正確答案：:zero-offset正確答案：:scale第24題Humanerrorsmaywellbesystematicorrandom第25題Illegitimateerrorscanbeeliminatedthroughexerciseofcareorrepetitionofthemeasurement.第26題Readinglowwhilethemeasuredvariableisincreasedandreadinghighwhilethemeasuredvariableisdecreased,whichiscalledas____.正確答案：:hysteresis第27題Accuracyisdefinedas().AameasureofhowoftenanexperimentalvaluecanberepeatedBtheclosenessofameasuredvaluetotherealvalueCthenumberofsignificantfiguresusedinameasurementDnoneofthese第28題Whenaseriesofrepeatedmeasurementsthataremadeonacomponentundersimilarconditionsareplotted,itfollows().Alog-normaldistributionBWeibulldistributionCbinomialdistributionDGaussiandistribution第29題Randomerrorscanbeassessed?b()AexperimentallyBbyperformingsensitivityanalysisCstatisticallyDempirically第30題Hysteresisofaninstrumentaffectsits().AresolutionBaccuracyCrepeatabilityDzerostability第31題Loadingeffectmeans().AeffectoftheappliedloadontheinstrumentBimpactoftheappliedloadontheaccuracyoftheinstrumentCcapabilityoftheinstrumenttowithstandtheappliedloadDincapabilityoftheinstrumenttomeasurethemeasurandinanundistortedform第32題Whichoneofthefollowingisnotadynamiccharacteristic?()ADriftBSpeedofresponseCMeasuringlagDFidelity第33題Manyinstrumentsdonotreproducethesamereadingirrespectiveofwhetherthemeasurementshavebeenobtainedinanascendingoradescendingorder.Thisisdueto().AlinearityerrorBdrifterrorCsystematicerrorDhysteresis第34題Fidelityisa/an().AstaticcharacterBdynamiccharacterCneitherastaticnoradynamiccharacterDundesirableerror第35題Themaximumdeviationoftheoutputofameasuringsystemfromaspecifiedstraightline,appliedtoaplotofdatapointsonacurveofthemeasuredvaluesversusthemeasuredvaluesiscalled().AlinearityBthresholdCmeasurementlagDresolutionExercise第1題Thesignaldefinedbytheequationsf(t)=0fort<0,f(t)=Efor0≤t≤aandf(t)=0fort>ais().AastepfunctionBapulsefunctionCashiftedstepfunctionoriginatingatt=aDnoneoftheabove第2題Theperiodofthefunctioncosπ/4(t-1)is().A1/8sB8sC4sD1/4s第3題TheFourierSeriesofanoddperiodicfunction,containsonly().AOddharmonicsBevenharmonicsCcosinetermsDsineterms第4題TheTrigonometricFourierSeriesofaperiodictimefunctioncanhaveonly().AcosinetermsBsinetermsCcosine&sinetermsDDC&cosineterms第5題Afunctionhavingfrequencyfistobesampled.ThesamplingtimeTshouldbe().A1/2fB>1/2fC<1/2fD≤1/2f第6題TheF.T.ofaconjugatesymmetricfunctionisalways().AImaginaryBRealCconjugateUnsymmetricDconjugatesymmetric第7題WhichofthefollowingcannotbetheFourierSeriesexpansionofaperiodicsignal().Ax(t)=2cost+3cos3tBx(t)=2cosπt+7costCx(t)=cost+0.5Dx(t)=2cos1.5πt+sin3.5πt第8題Whichofthefollowingis/arenotaproperty/propertiespowerspectraldensityfunctionSx(ω)?()ASx(ω)isrealfunctionofωBSx(ω)isaevenfunctionofωCSx(ω)isnon-positivefunctionofωSx(ω)≤0forallωDAlloftheabove第9題Theanalogsignalgivenbelowissampledby600samplespersecondform(t)=3sin500πt+2sin700πtthenfoldingfrequencyis().A500HzB300HzC700HzD1400Hz第10題signalm(t)ismultipliedbyasinusoidalwaveformoffrequencyfcsuchthatv(t)=m(t)cos2πfct.IfFouriertransformofm(t)isM(f),Fouriertransformofv(t)willbe().A0.5M(f+fc)B0.5M(f-fc)C0.5M(f+fc)+0.5M(f-fc)D0.5M(f-fc)+0.5M(f-fc)第11題Theanalogsignalm(t)isgivenbelowm(t)=4cos100πt+8sin200πt+cos300πt,theNyquistsamplingratewillbe().A1/100B1/200C1/300D1/400第12題IfH(f)=y(t)/x(t)thenforthistobetruex(t)is().Aexp(j2πf/t)Bexp(-j2πf/t)Cexp(j2πft)Dexp(-j2πf/t)第13題Whichofthefollowingsignalsis/areperiodic?()As(t)=cos2t+cos3t+cos5tBs(t)=exp(j8πt)Cs(t)=exp(-7t)sin10πtDs(t)=cos2tcos4t正確答案：ABD第14題stepsignalispassedthroughintegratorthenoutputwillbe____.正確答案：:rampsignal第15題Areaundertheimpulsesignalis____.正確答案：:1第16題impulsesignalispassedthroughtheintegratorthenoutputwillbe____.正確答案：:stepsignal第17題TheinverseFouriertransformofδ(t)is____.正確答案：:1第18題TheTrigonometricFourierSeriesofaperiodictimefunctioncanhaveonlyAcosinetermsBsinetermsCcosine&sinetermsDDC&cosineterms第19題Afunctionhavingfrequencyfistobesampled.ThesamplingtimeTshouldbeA1/2fB>1/2fC<1/2fD≤1/2f第20題第21題Ifpressure-timefunctionis??=100sin80??+50cos(160???π∕4),thenthefundamentalfrequencyis____,amplitudesofthefundamentalandsecondorderare____and____.正確答案：:80rad/sor12.7Hz正確答案：:100正確答案：:50第22題ThefrequenciesoftheDFTarespacedinincrementsof???=____正確答案：:1/(NΔt)=f_s/N第23題Thewaytoavoidfrequencyaliasinganddistortionofthesampledsignalcanbe____.正確答案：:fs>2fmax第24題WhichofthefollowingcannotbetheFourierSeriesexpansionofaperiodicsignalAx(t)=2cost+3cos3tBx(t)=2cosπt+7costCx(t)=cost+0.5Dx(t)=2cos1.5πt+sin3.5πt第25題Whichofthefollowingis/arenotaproperty/propertiespowerspectraldensityfunctionSx(ω)?ASx(ω)isrealfunctionofωBSx(ω)isaevenfunctionofωCSx(ω)isnon-positivefunctionofωSx(ω)≤0forallωDAlloftheabove第26題Whichofthefollowingsignalsis/areperiodic?As(t)=cos2t+cos3t+cos5tBs(t)=exp(j8πt)Cs(t)=exp(-7t)sin10πtDs(t)=cos2tcos4t正確答案：ABD第27題Theanalogsignalgivenbelowissampledby600samplespersecondform(t)=3sin500πt+2sin700πtthenfoldingfrequencyisA500HzB300HzC700HzD1400Hz第28題signalm(t)ismultipliedbyasinusoidalwaveformoffrequencyfcsuchthatv(t)=m(t)cos2πfct.IfFouriertransformofm(t)isM(f),Fouriertransformofv(t)willbeA0.5M(f+fc)B0.5M(f-fc)C0.5M(f+fc)+0.5M(f-fc)D0.5M(f-fc)+0.5M(f-fc)第29題Theanalogsignalm(t)isgivenbelowm(t)=4cos100πt+8sin200πt+cos300πt,theNyquistsamplingratewillbeA1/100B1/200C1/300D1/400第30題Ifthenforthistobetruex(t)isAexp(j2πf/t)Bexp(-j2πf/t)Cexp(j2πft)Dexp(-j2πf/t)第31題Samplethesignalx(t)=sin(2π?500?t)withsamplingfrequencyfs=4096HzandtotalnumberofsamplingpointsN=2048.theNyquistfrequencyis____Hz,thefrequencyresolutionis____Hz.正確答案：:1000正確答案：:2第32題Samplethesignalx(t)=sin(2πt)+sin(6πt)+sin(10πt),thelowestsamplingfrequencyshouldbe____Hzandandminiumsamplingpointsshouldbe____.正確答案：:20正確答案：:10第33題StepsforAccurateDiscreteSamplingincludes____,____,____.正確答案：:Choosethesampleratefsgreaterthantwiceofthehighestfrequencyinthesignal正確答案：:Usealow-passfilterasanti-aliasingfilter正確答案：:ChoosethenumberofpointsN>fs/fmin第34題AsquarewavewithamplituideAandcycleT,itsfourierseriesexpansionis____.正確答案：:x(t)=4A/π∑(sin(2n-1)2πft)/(2n-1)Exercise第1題Thebehaviourofaninstrumentundervaryingconditionsofinputwithtimeisknownas().AloadingeffectBhysteresisCdynamicresponseDlinearity第2題Deadtimeisthetimerequiredbyameasuringsystemto().ArespondtoachangeinthequantitytobemeasuredBeliminateloadingerrorCovercomezerodriftDincreasethethresholdvalue第3題Thresholdvaluecorrespondstotheminimumvalueofaninputrequiredto().AreducedynamicerrorBdetectanoutputCincreasedriftDreducedeadtime第4題Foralinearsystem,sensitivityrepresentstheslopeofthetransferfunction.第5題Theresolution,R,isdefinedasthesmallestintervaloftheoutputthatcanbeobserved.第6題StaticSystemResponseinclude____,____,____.正確答案：:Sensitivity正確答案：:resolution正確答案：:RangeandSpan第7題Iftemperatureismeasured,ataratedtemperatureof50C,theoutputmightbe4.95Vwhentemperatureincrease,but5.05Vwhentemperaturedecreases,thehysteresisis____.正確答案：:0.01第8題Equationsareusedtodescribetherelationshipbetweentheinputandoutputofasystemcanbe____,____,____,____.正確答案：:differentialequation正確答案：:Transferfunction正確答案：:Frequencyresponse正確答案：:Impulseresponse第9題Transferfunction,H(s),ofasystemisdefinedastheratiooftheLaplaseTransform(LT)oftheoutputvariable,Y(s),totheLToftheinputvariable,X(s),with____.正確答案：:alltheinitialconditionsareassumedtobezero第10題LaplaceTransformofδ(t)is____.正確答案：:1第11題Amplitudefrequencyresponseofasystemisshownasthefigure,frequencybandwidthis____.正確答案：:16.43kHz第12題Tworequirmentstoachieveafidelitymeasurementare____,____.正確答案：:Amplitudefrequencyresponseisconstant正確答案：:Phasefrequencyresponseispropotional第13題A5-kgmassisstaticallysuspendedfromaload(force)cellandtheloadcelldeflectioncausedbythismassis0.01mm.Thenaturalfrequencyoftheloadcellis____.正確答案：:990Hz第14題Foradynamicsystem,systemresponsecanexpressedas____,____，____.正確答案：:transmissioncharacteristics正確答案：:frequencyresponse正確答案：:differentialequations第15題Autocorrelationfunctionofperiodicsignalisstillperiodicsignalwiththesamefrequency.第16題randomsignalcanbecalssifiedas____and____.正確答案：:stationary正確答案：:nonstationary第17題Stationaryrandomprocessesmaybefurthercategorizedasbeingeither____or____.正確答案：:ergodic正確答案：:nonergodic第18題f(t)*δ(t）=____.正確答案：:f(t)第19題Thefouriertransformofunitimpulseδ(t)is____.正確答案：:1第20題ifthefouriertransformofx(t)isX(f),thenthefouriertransformofx(kt)is____.正確答案：:X(f/k)第21題ifthefouriertransformofx1(t)andx2(t)isX1(f)andX2(f),thenthefouriertransformofx1(t)x2(t)is____.正確答案：:X1(f)*X2(f)第22題Featuresofperiodicsignalspectruminclude:____,____,____.正確答案：:discrete正確答案：:harmonic正確答案：:convergence第23題Periodicsignaliscomposedwithinfinitiveharmonicperiodicsignals第24題ThebehaviourofaninstrumentundervaryingconditionsofinputwithtimeisknownasAloadingeffectBhysteresisCdynamicresponseDlinearity第25題DeadtimeisthetimerequiredbyameasuringsystemtoArespondtoachangeinthequantitytobemeasuredBeliminateloadingerrorCovercomezerodriftDincreasethethresholdvalue第26題ThresholdvaluecorrespondstotheminimumvalueofaninputrequiredtoAreducedynamicerrorBdetectanoutputCincreasedriftDreducedeadtime第27題StaticSystemResponseinclude____,____,____.____,____.正確答案：:Sensitivity正確答案：:resolution正確答案：:RangeandSpan正確答案：:threshold正確答案：:deadband第28題第29題AsimplepassiveLRClow-passfilterisshownasfigure,thedifferentialequationofthissystemis____,thenaturefrequencyis____.正確答案：:圖片1正確答案：:圖片2Exercise第1題Straingaugemeasuresstrainbasedonchangesof().AcapacitanceBresistanceCinductanceDlength第2題Aninfraredthermometerisa()sensor.AcontactBnon-contactsensorCpassiveDactive正確答案：BC第3題Astraingaugeisa()sensor.AcontactBnon-contactsensorCabsoluteDrelative正確答案：AC第4題Parallelplatecapacitorcanbeusedasasensorbyvarying().AgapBcapacitiveareaCdielectricityDtemperature正確答案：ABC第5題Thesematerials()arepiezoelectricmaterials.AquartzBcanesugarCsilicaDsilicon正確答案：AB第6題Thermocouplemeasuresthetemperaturedifference,soitisanactivesensor.第7題Inductivesensorsarenormallypassivesensors.第8題Normally,semiconductorstraingaugesaretemperaturesensitive.第9題FrequencyofthesourcemustbelowwithrespecttothefrequencyofmotionofthecoretoavoiderrorsintheoutputvoltageduetoslowresponseoftheLVDT.第10題Capacitivefuelgagesarebasedonthechangeofdielectricityofacoaxialcapacitor.第11題Appearanceofanelectricpotentialacrosscertainfacesofacrystalwhenitissubjectedtomechanicalpressureiscalledpiezoelectriceffect,onthecontrary,itiscalledinversepiezoelectriceffect.第12題Asensorthatrequiresexternalpowertooperateisa____sensor,whilethatgeneratesitsownelectricsignalanddoesnotrequireapowersourceisan____sensor.正確答案：:passive正確答案：:active第13題Theunitofstrainis____.正確答案：:1第14題Constantanisanormallyusedmaterialforstraingauge,andithasa____percentofCuand____percentofNiinweight.正確答案：:0.6正確答案：:0.4第15題ALVDTneedsoneprimarycoil,andtwosecondarycoilsconnectedin____.正確答案：:opposition第16題Asensorthatrequiresexternalpowertooperateisa____sensor,whilethatgeneratesitsownelectricsignalanddoesnotrequireapowersourceisan____sensor.正確答案：:passive正確答案：:active第17題Constantanisanormallyusedmaterialforstraingauge,andithasa____percentofCuand____percentofNiinweight.正確答案：:0.6正確答案：:0.4第18題Asensorrequiressignaltransformationfrom____quantityto____quantity.正確答案：:physical正確答案：:elelctrical第19題Physicalstimulusisthequantitythatissensed,sometimescalledthe____.正確答案：:measurand第20題Basicstructuresofsensorsare____,____,and____arrangment.正確答案：:directorseries正確答案：:differentialorparallel正確答案：:balancingorfeedback第21題Themaindevelopingtrendsofsensorsare____,____,and____.正確答案：:integration正確答案：:intelligence正確答案：:imagination第22題Thesensorbasedonangular-motionvariableresistancehasanonlinearinput-outputrelationsincethemotionisnotlinear.第23題Theresistancesensorbasedontheslidingconductdeviceissimpleandcheap,buttheoutputisnoisywhentheslidermoves.第24題Straincanberelatedto().AstressBforceCtorqueDacceleration正確答案：ABCD第25題Thegaugefactorofmaterialsareallpositive.第26題Themostcommontypeofstimulisensedbyinductivesensorsare______,______and______.()ApositionorproximityBdisplacementCmaterialcompositionDcurrents正確答案：ABC第27題RVDTisavariationoftheLVDT,whichisintendedfor____and____.正確答案：:angulardisplacement正確答案：:rotarypositionsensing第28題Anytwoconductingbodies,regardlessofsizeanddistancebetweenthemhaveacapacitance.第29題Thesensitivitycanbeincreasedandthenonlinearitycanbereducedbyusingdifferentialcapacitancesensors.第30題Theaccelerometersbasedonthepiezoelectrictransducercanbeusedtomeasurestaticacceleration.Exercise第1題Whatcanthesignalconditioningdo?()AConvertchangesofmeasuredparameterstovoltagechangesBSubtractoffsetvoltageCIncreasesignalvoltageDRemoveunwantedfrequencycomponent正確答案：ABCD第2題Filterscanbeclassifiedas().AlowpassBhighpassCbandpassDbandbarrier正確答案：ABCD第3題Thisbridge,especiallywithresistivebranchesisthecommonmethodofinterfacingwith().AstraingaugesBpiezoresistivesensorsChallelementsDthermistors正確答案：ABCD第4題OnlyamplitudeconditionisrequiredforACbridge.第5題Thetemperatureinducederrorinasensorcanbecompensatedbyusingabridgecircuit.第6題Anamplifierisadevicethatonlyamplifiesavoltagesignal.第7題Amplifierscanalsobeusedforimpedancematchingpurposesevenwhennoamplificationisneeded.第8題Forabandpassfilter,thequalityfactoristheratioofthecenterfrequencyofthebandpassovertheentirebandpassregionfromthelowertouppercutofffrequencies.第9題Thesensitivityoffullar