多路数据采集与分析系统的设计及应用 外文文献 外文翻译 英文文献.docx

多路数据采集与分析系统的设计及应用 外文文献 外文翻译 英文文献.docx

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多路数据采集与分析系统的设计及应用外文文献外文翻译英文文献

附录五

中英文资料

Multi-channeldatacollectionandanalysis

ofthedesignandapplication

Abstract:

ThePapermainlyintroducesamultichanneldataacquisitionandanalysissystemcomposedofonePCandonemeasuringinstrument.Thesystemcantesteightproductsparallelly.Itreducesthetestcostandimprovesworkefficiency.Thepaperalsogivesthehardwarestructureandsoftwareflowdiagramofthesystem.Theapplicationinthegyrotestisalsointroducedbriefly.

Keywords:

communicationprot;dataacquisition;gyro;test

Withthedevelopmentofcomputertechnologyandthedigitalmeasuringinstrument,usuallybycomputerandmeasuringinstrumentstocommunicatewitheachotherinreal-timedatacollectionanduseofcomputerpowerfulcomputingcapabilitytoconducttheanalysisofthedataprocessing.Particularlyinthelargevolumeofdata,measuringthelengthoftimeoccasions,suchastheGyro-tilttest,usingcomputerforautomaticcontrolofmeasuringinstruments,automaticdataacquisitionandanalysisitisparticularlyimportant,cansavealotofmanpowerandmaterialresourcestoimproveworkefficiency,reducecosts,Theconventionalmethodoftestingisusuallyameasuringinstrumentatthesametimecanonlytestaproduct,namelyacomputerandameasuringinstrumenttestsystemcanonlybecomposedofserialtesting.Totestmultipleproductsatthesametime,theyneedmultiplesystems,testingproductsinlargevolume,lowefficiency,suchasthecompositionofseveralsetsoftestsystem,anincreaseofcost.FirstonamachinewithaPCandameasuringinstrumentconsistingof8-waydatacollectionandanalysissystem,whichcancarryoutmultiplesetsofproducttesting,atnoadditionalcostonthebasisofacomputergivefullplaytotheadvantagesofautomatictest,Improveworkefficiency.

1Principle

Thesystemhardwareandsoftwaresystem.APCthroughaRS232portandameasuringinstrumentconnected,PC-parallelport（LPT）andan8-waychannelselectorattachedtoa8-wayconnectorwillchannelselectorwereconnectedwithanumberoftestproducts.

TheworkingprincipleasshowninFigure1.Thecourseoftesting,computerthroughtheparallelport8-waycontrolchannelselection,wereopendifferentchannels,eachchannelfordatatransmissionbychoosingtomeasuringinstruments,measuringinstrumentsthroughtheRS232porttothecomputerdatasenttosave,Acompletecycleofallchannelsofdatacollection,andthishasalsotestedanumberofproductfeatures.

Figure1systemblockdiagramofwork

Throughoutthecourseoftesting,allthecontroloperationshavecompletedthesoftwareautomatically,withouthumanintervention.

2hardwaredesign

ThesystemismainlytousethecomputeronboardRS232communicationportsanddigitalmeasuringinstrumentofcommunicationportconnectingcommunications,re-useLPTparallelportona8-waychannelselectorforaccesscontrol.8-waychannelofchoiceforan8-electedoneofanalogswitchesandrelatedcircuit,thecontrolsignalsfromthecomputer'sparallelporttoprovideandmeetshownintable1.

Table1Therelationbetweenchannelselectionandportoutput

Communicationsportoutput

Binarycode

Channelselectionselectchannel

0

000

1

1

001

2

2

010

3

3

011

4

4

100

5

5

101

6

6

110

7

7

111

8

8-waychannelselectorindustrycanusetheSCM,subjecttoadditionalcontrols,selectRS232serialportasdatatransmission,becausetheRS232portisthecomputerandmeasuringinstrumentsonthestandardconfiguration,communicatewitheachotherwithoutadditionalhardware,Easytouse.Inaddition,aserialcommunication-onlyabit,withonlyastandarddata-voltagepotential,hencemoredifficultindataerrors.Inaparallelporttotransferdata8-bit,datatransmissionspeed,butthedatavulnerabletointerference.Transmissiondistanceinashorteramountofdatatransmissionlargercircumstances,maybeparallelport（suchasGPIB,LPT,etc.）tocommunicate.Inaddition,sinceLPTparallelportmaysignaltransmission,channelselectionissuitableforthecontrolport.

Systeminthecourseofwork,goodaccesscontrolmodulesanddataacquisitionmodulesynchronizationisparticularlyimportantbecausedifferentchannelsofdatastorageneedsofthecorrespondingdatabufferpool,whichiscontrolledbysoftware.

3softwaredesign

Thewholesystemsoftwaredesignisthemostimportantpart.Softwaresystemfromthebottomofthecommunicationprotocolcanbedividedintofunctionalthree-tiermoduleanduserinterface.Softwaredesignintheuseofmulti-threadedWindowstechnology,thetechnologyfordatacollectionprocedurescaneffectivelyacceleratethereactiontimeandincreasetheefficiencyofimplementation.Theproceduresusedinaseparatethreadfordatacollection,sotheguaranteedmaximumenergycollectionofreal-time;usinganotherthreadatthesametimedataprocessing,suchprocedurestoavoidasingle-threadedthesametimeonlytheimplementationofafunctionaldeficiencies.Especiallywhentheamountofdatacollection,dataprocessingtask,usingmulti-threadedtechnologywillgreatlyimprovetheefficiencyofthesystemasawhole.

3.1DataAcquisitionModule

Dataacquisitionmodulestoeightchannelsofdatainacycleofalltheacquisitiontothecomputer,andsavethechannel,andthecorrespondingdatainthebuffer.ItsproceduresdiagramshowninFigure2.

Fig2Flowdiagramofdataacquisition

Atthebeginningofprocedures,withthechoiceofcontrolandstoredatabufferatthesametimetoswitchtothesamechannel,8-waydatacollectioncycleandcommandjudgement,intheendnotreceivedorders,hasrecyclingcollectiontodo.

Multi-channeldataacquisitionprocessthedatavulnerabletointerference,especiallyinthefast-channelswitching,thedatavulnerabletofluctuations,asshowninFigure3.Atthistimeifthedatacollection,willbecollectingthewrongdata,theneedtoaddsomesoftwarealgorithmstopreventthisfromhappening.Ifwedeveloptheautomateddatatrackingalgorithmtoautomaticallytrackeachchanneldatatodeterminewhetherthechannelinastablestate,andonlythestabilityofdataacquisition,thevolatilityofotherdata.Inaddition,thesoftwarecanalsoaddsomefilteringalgorithm（suchaslimitingfilter,etc.）tofilteroutman-madeinterferenceorotherfactorscausedbythemutationdata.Limitingfilterfor

（1）

Figure3channelswitching,thedatavolatility

Whenthenewcollecteddataandthedatabeforeadifferencetotheabsolutevalueofmorethanonesetofvaluesthatthedataisinvalid,andthepreviousdatafromthecurrentdata.

3.2DataAnalysisModule

Inthedataanalysismodulecanbeaddedifthealgorithmanalysis,graphicsdisplayandprintoutput,andotherusefulfeatures,suchasgyroscopesandstabilityinthestandarddeviationalgorithmcanfunctioninthecourseoftestingreal-timecalculationofzerostability,andthroughchartshows.Zerostabilitycalculationformulaasfollows:

（2）

Accordingtofirst-

（2）toprepareanalgorithmfunction,andthencallintheanalysismodule.AnalysismodulediagramoftheprocedureshowninFigure4.

Figure4dataanalysisprocessflowchart

Becausethesystemusesmulti-threadedtechnology,inthecycleofoperationandwillnotaffecttheacquisitionmodule'soperation.Themodulealsoinitsalgorithminthefunctionofanyexpansion,formingaalgorithmtoadapttodifferentproceduresfordataanalysis.

Inaddition,softwaredesign,afriendlyuserinterfaceisnecessaryintheprocessofthefunctionsfromthepackage,throughaunifiedinterfacetousers,toreduceoperatingdifficultiesandenhanceefficiency.

4systemtestresults

Figure5to8intheanalysisofdataacquisitionsystems,atthesametimetwothree-axisgyroandasingleaxisgyroscopetotalofsevenroadtestdataofthesituation.Itsprecisedatacollection,dataanalysiscanbeconductedatthesametime,andthroughreal-timecharts,user-friendly,easytooperate.

Figure58DataCollectionandAnalysisSystem

5Conclusion

Multi-channeldataacquisitionandanalysissystemforthehardwarerequirementssimple,easytosetup,canbeappliedtovarioustestsoccasions,itcanalsotestmultipleproducts,therebyreducingthecostandenhanceefficiency.Asaresultofamulti-threadedtechnology,thespeedofdataacquisitionsystemsandhardwareonly（instrument）andtheresponsespeedofthespeedofCommunication.Withthecollectionandanalysissoftwarealgorithmhasnothingtodo.

PADprogrammingtoolscanbeusedtodevelopadatacollection,dataanalysis,graphicsdisplayandprintoutput,andotherpowerfulfeaturesandfriendlyuserinterfaceofoursoftware.Softwaremodulardesignandeasytocarryoutexpansion,accordingtodifferentalgorithmfordataanalysisattherequestofupgrades,andhardwarecanremainthesame.Thesystemgivefullplaytotheuseofcomputersandmeasuringinstrumentsofmutualcommunication,automationandtestadvantage.

多路数据采集与分析系统的设计及应用

摘要：

介绍了用一台PC机和一台测量仪表组成的8路数据采集与分析系统。

该系统可并行测多个产品，从而降低测试成本，提高工作效率。

给出了系统硬件结构和软件流程图，并介绍了该系统在陀螺测试中应用。

关键词：

通信端口；数据采集；陀螺；测试

随着计算机技术的发展和测量仪表的数字化，通常利用计算机和测量仪表相互通信进行数据的实时采集，并利用计算机强大的运算能力进行数据的分析处理。

特别在数据量大、测量时间长的场合，如陀螺零位稳定性测试，利用计算机对测量仪表进行自动控制、自动数据采集分析显得尤为重要，可节省大量人力和物力，提高工作效率，降低成本，常规的测试法通常一台测量仪表在同一时间只能测试一个产品，即一台计算机和一台测量仪表组成的测试系统只能进行串行测试。

若要同时测试多个产品，就需多个系统，在测试产品量较大时，工作效率低，如组成多套测试系统，增加了成本。

先介绍一个用一台PC机和一台测量仪表组成的8路数据采集与分析系统，可同时进行多套产品的测试，在不增加成本的基础上，充分发挥了计算机自动测试的优势，提高了工作效率。

1系统原理

该系统有硬件系统和软件系统组成。

一台PC机通过RS232端口和一台测量仪表相连接，PC机并行端口（LPT）和一个8路通道选择器相连，一个8路连接头将通道选择器分别与多个测试产品连接。

系统的工作原理如图1所示。

测试过程中，计算机通过并行端口控制8路通道选择器，分别打开不同的通道，各通道数据通过选择器传送到测量仪表中，测量仪表再通过RS232端口把数据发送到计算机中保存，在一个周期内完成所有通道的数据采集，这样就实现了同时测试多个产品的功能。