转速测量仪机车光电转速传感器中英文对照外文翻译文献.docx
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转速测量仪机车光电转速传感器中英文对照外文翻译文献.docx
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转速测量仪机车光电转速传感器中英文对照外文翻译文献
中英文对照外文翻译
(文档含英文原文和中文翻译)
英文原文:
DesigningtheTestingandControllingInstrumentofthePhotoelectricRotatingSpeedSensorBasedonAT89C52
Abstract
Aimingatthenecessityofperformancetestofphotoelectricrotatingspeedsensorandthelimitationoftraditionaltestinginstruments,byusingdual-processormodularstructureofAT89C52,anewtestinginstrumentisdesignedanddeveloped,whichisagenerationofadvancedinstrumentwithpracticalhighperformanceandhighreliability.Thephotoelectricrotatingspeedsensorisdrivenandtestedbytheinstrument.Thedriveandtestofthephotoelectricrotatingspeedsensorareimplemented.Thehardwaredesignofdriveandtestcircuitmoduleintestingandcontrollinginstrumentareintroduced,andthesoftwaredesignisalsopresentedbydriveandtestcircuitproceduresofstepmotor.Thepracticalrunningindicatesthedevelopedtestingandcontrollinginstrumentimprovesworkingefficiencyandtestingobjectivereality,ithasdefinitelypracticalvalue.
Keywords:
Pulse Sensor Microprocessor Stepmotor
B.1Introduction
TQG15locomotivethePhotoelectricRotatingSpeedSensorisusedfordetectingthespeedofRailwaylocomotivevehiclewheel,itprovideselectricpulsesignalforlocomotiveelectriccontrolsystem,andisoneofthemainparametersofthelocomotivesafety,reliability,normalwork.ToensuretheTQG15locomotivephotoelectricrotationalspeedsensorqualityandperformance,Thetestisveryimportant.
Thetraditionaldetectiondevicesarebasedonmanualoperation,onlyafewlimitedperformanceindicatorsofdetection,thereisahighprecisionandproductivitylowdisadvantages.Withthecontinuousdevelopmentofelectronictechnology,especiallytheSingle-chiptechnologyinintelligentinstrumentwidelyapplication,developmentanewgenerationofhighperformanceandpracticalthetestingandcontrollinginstrumentofthephotoelectricsensorisimperative.
B.2TQG15locomotivethePhotoelectricRotatingSpeedSensor
B.2.1Structureandworkingprinciple
TQG15locomotivethePhotoelectricRotatingSpeedSensorconsistsoffulcrumbearinginstitutions、rotationshaftanduniversalunitedshaftdriving、optoelectronicconversioncircuit.Optoelectronicconversioncircuit'sthecoreissmallcircuitboardswhichconsistsofgratingplateandphotosensitivetransistor,gratingplatefixedinthehingeshaftends,throughseven-corecabletoconnectasmallcircuitboardandtheexternalcircuit,Seven-corecableisdividedintotwogroupsAandB,eachgrouphasthreelines,twoofthelinestoadd15VDCpower,otheroutputpulsesignals.
AfterTQG15locomotivethePhotoelectricRotatingSpeedSensorconnectedto15Vpowersupply,usinglight-emittingdiodes(leds)asthelightsource,gratingplaterotatingdrivenbythewheelshaft,becausetheblockingeffectofgratingplate,thusthelightsourcebecomesintermittentlight,thenleadthelightinterruptersphotosensitivetransistorswitchinterchangeablytoproducethepulsesignals,throughthemagnifyingcircuitreshaping,outputsquare-wavepulsethatitandspeedisproportional,inordertomeettheelectricalcontrolsystemoflocomotiveworkneeds.
B.2.2Performanceindexandtestcontent
theTestingandControllingInstrumentrequiredperformanceindexfor:
Dcworkingpower:
(15±15%)V,powerdissipationcurrentlessthan:
50mA,outputpulseamplitude(Whentheloadresistoris3kΩ):
high-level≥9V,low-level≤2V,phaseposition:
90°±50%,rotationalspeedrange:
0~1000r/min,thenumberofpulsespercircle:
200,thedutyfactorofoutputpulse:
(50±20)%.
theTestingandControllingInstrumentrequiredtestparametersfor:
rotationalspeed、pulsenumber、Thelowesthigh-level、Thehighestlow-levelandthedutyfactorofpulse.
B.2TheTestingandControllingInstrument’shardwaredesign
TheAT89C52isalow-power,high-performanceCMOS8-bitmicrocontrollerwith8Kbytesofin-systemprogrammableFlashmemoryand256bytesofRAM,thedevelopmentofinstrumentchosenAT89C52microcontroller.
Accordingtotheworkprincipleofphotoelectricsensor,themainperformanceindexesandtestcontent,theTestingandControllingInstrument’sgeneralprinciplestructureschematicinstrumentisshowninfigure1
Fig·1 Hardwarestructureofmeasuringandcontrollinginstrument
Itsworkingprocess:
throughthekeyboardofinitializationandfunctionaftersetting,thenexecuteAT89C52applications,outputpulsesignal,drivesteppmotorandphotoelectricsensorsrotate,throughthesignalcircuitandA/Dconverter,thenphotoelectricsensoroutputpulsesignalsintodigitalsignals,intotheAT89C52microcontroller,afterdataprocessing,sendtomonitorandmicroprinteroutput..
Stepmotorliftingspeedcontrolneedtwotimerinterrupthandling;Althoughphotoelectricspeedsensorpulsesignaltestcontentcanbeastep-by-stepprocess,butintestingdutyfactor、whentwochannel'sphasedifferenceisequal,allneedtwotimers.butAT89C52Chipcanonlyprovidethreetimer/counter,theAT89C52singleresourcesarenotqualifiedforthetestingandcontrollinginstrument’sjob.Besides,inordertosimplifytheoperationofthetestingandcontrollinginstrumentanduse,thetestingandcontrollinginstrumentadoptsthedualstructureofAT89C52microprocessor,therefore,thetestingandcontrollinginstrumentofthephotoelectricrotatingspeedsensordividedintodrivecircuitandsignalmeasuringcircuittwofunctionalmodules.
B.2.1Drivingcircuitmoduledesign
Inordertodrivephotoelectricsensorsrotateandeasilyadjustitsspeed,youneedtoselectsuitableforthesystemcharacteristicsandapplicationsofmotor,asthephotoelectricrotatingspeedsensor’spowerplant.sepmotorhasfourcharacters:
①Stepangleandspeedsizeonlyandproportionaltothepulsefrequency;②Bychangingthesizeofthepulsefrequencyrangecanadjustmotorspeed;③Toachievequickstart-up,brake,inversion;④Highcontrolaccuracyandreliableoperation.Stepmotorcharacteristicsofthesefouraspects,applicabletothesystem,therefore,inthetestapparatus-drivenpartoftheselectionofthesteppermotorasapowerplant.
Stepmotorisatypeofelectricpulseintoangulardisplacementofmotor.thepowertodrivebyspecialoffersaseriesofsteppingmotorwithcertainregularityofelectricalsignals,eachinputanelectricalpulse,itfurtherbeforesteppingmotor,itsangularandpulseproportionaltothenumberof,motorspeedproportionaltothepulsefrequency,rotatingspeedandrotatingdirectionareconnectedwitheachphasewindings’wayofelectricity[1].
UseAT89C52MCUphotoelectricspeedsensordrivecircuitmodule,outputthedesiredfrequencypulsesignals.accordingtothefunctionrequirementofdrivecircuitandtheprincipleofsteppingmotor,thetestingandcontrollinginstrumentdrivermodulehardwareprincipleasshowninFigure2:
Fig·2 Structureschematicofdrivermodule
InFigure2forthesteppermotorspeedgradingcontrol,InAT89C52microcontrollerP1portpinaccesscontrol300,500,700and900fourspeed(r/min)workinthepress.TakeadvantageofsomeoftheP2portpindrivelight-emittingdiode,indicatesthecurrentstepmotorspeedsegment.While,P2.0tubefeetoutputsteppingmotorrequiredpulsesignal,controlsteppermotorswork.Besides,P1•6andP1•7pinusedtoimplementthedrivecircuitandtestcircuitofsimplecommunication,namelysteppermotorworkneededtospeed,takeadvantageofP1•6controltestcircuitryfortesting,whilethetestiscompleted,withP1.7controlsteppermotorcanworktothenextfile.
B.2.2Testcircuitmoduledesign
Accordingtothephotoelectricsensoroutputspeedelectricpulsesignalcharacteristicsandtherequiredtestparameters,thetestingandcontrollinginstrumentofmeasurementcircuitmodulehardwareconfigurationasshowninFigure3
Fig·3 Structureschematicoftestcircuit
Figure3themeasuringcircuitconsistsoffourparts:
①Signalconditioningandacquisitioncircuit,thephotoelectricspeedsensor15VsquarewavesignalconvertingcanreceivetheCMOSAT89C52level.usedtomeasurephotoelectricsensor’sthenumberofpulses,pulsedutycycleandphaseparameters.besides,usinghigh-performanceADCAD574Aachievepulsesignalhigh-lowamplitudemeasurement;②Switchcontrolcircuit,takeadvantageoftheP1portselectionthroughA,Bchannelpulsesignals;meetAandBchannelpulsesignaltestingwork;③TheI/Ocircuit,oneistousethekeyboardinputcircuitoftherelevantinformationaboutrealizingfunctionkeysofinitializationanddifferenttestcontent,thesecondistousetheLCDdisplaytheworkofthetestinstrumentintime,threeistheuseofmicro-printertoprintthetestresultsarchive.④SCMAT89C52,AT89C52isthecoreofthetestcircuit,toachievecoordinationofdatainput,output,operationandprocessing.
B.3softwaredesign
Thesoftwaredesignbasedonthesystemfunction,performance,anduserrequirements,andadoptmodularizedstructureand"top-down"approachtodesignjob.Toimprovetheworkefficiency,run-timeminimizingmanualinterventionandaction,while,systeminitializationworkstatusonlineadjustable,intuitivedisplay.accordingtothetestingandcontrollinginstrumenthardwarestructurelayoutandfunctionalityrequirements,softwaredesigncontentmainlyincludesthestepmotordriverandsignaltestingtwobasicmodules,thefollowingisadescription.
B.3.1Stepmotordriverdevelopment
Photoelectricsensorperformanceparametersofthetest,needamulti-levelspeeddrivenbyitsoutputsignalofelectricalimpulsesalongwithanyexceptionstothoseconditionstest.SteppingmotorspeedistheuseofmultistageAT89C52applicationsystem,bychangingthefrequencyofdrivenpulsetoim
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