多路數(shù)據(jù)采集與分析系統(tǒng)的設(shè)計及應(yīng)用外文文獻外文翻譯英文文獻范本

附錄五中英文資料Multi-channeldatacollectionandanalysisofthedesignandapplicationAbstract:ThePapermainlyintroducesamultichanneldataacquisitionandanalysissystemcomposedofonePCandonemeasuringinstrument.Thesystemcantesteightproductsparallelly.Itreducesthetestcostandimprovesworkefficiency.Thepaperalsogivesthehardwarestructureandsoftwareflowdiagramofthesystem.Theapplicationinthegyrotestisalsointroducedbriefly.Keywords:communicationprot;dataacquisition;gyro;testWiththedevelopmentofcomputertechnologyandthedigitalmeasuringinstrument,usuallybycomputerandmeasuringinstrumentstocommunicatewitheachotherinreal-timedatacollectionanduseofcomputerpowerfulcomputingcapabilitytoconducttheanalysisofthedataprocessing.Particularlyinthelargevolumeofdata,measuringthelengthoftimeoccasions,suchastheGyro-tilttest,usingcomputerforautomaticcontrolofmeasuringinstruments,automaticdataacquisitionandanalysisitisparticularlyimportant,cansavealotofmanpowerandmaterialresourcestoimproveworkefficiency,reducecosts,Theconventionalmethodoftestingisusuallyameasuringinstrumentatthesametimecanonlytestaproduct,namelyacomputerandameasuringinstrumenttestsystemcanonlybecomposedofserialtesting.Totestmultipleproductsatthesametime,theyneedmultiplesystems,testingproductsinlargevolume,lowefficiency,suchasthecompositionofseveralsetsoftestsystem,anincreaseofcost.FirstonamachinewithaPCandameasuringinstrumentconsistingof8-waydatacollectionandanalysiswordsystem,whichcancarryoutmultiplesetsofproducttesting,atnoadditionalcostonthebasisofacomputergivefullplaytotheadvantagesofautomatictest,Improveworkefficiency.1 PrincipleThesystemhardwareandsoftwaresystem.APCthroughaRS232portandameasuringinstrumentconnected,PC-parallelport(LPT)andan8-waychannelselectorattachedtoa8-wayconnectorwillchannelselectorwereconnectedwithanumberoftestproducts.TheworkingprincipleasshowninFigure1.Thecourseoftesting,computerthroughtheparallelport8-waycontrolchannelselection,wereopendifferentchannels,eachchannelfordatatransmissionbychoosingtomeasuringinstruments,measuringinstrumentsthroughtheRS232porttothecomputerdatasenttosave,Acompletecycleofallchannelsofdatacollection,andthishasalsotestedanumberofproductfeatures.Figure1 systemblockdiagramofworkwordThroughoutthecourseoftesting,allthecontroloperationshavecompletedthesoftwareautomatically,withouthumanintervention.2 hardwaredesignThesystemismainlytousethecomputeronboardRS232communicationportsanddigitalmeasuringinstrumentofcommunicationportconnectingcommunications,re-useLPTparallelportona8-waychannelselectorforaccesscontrol.8-waychannelofchoiceforan8-electedoneofanalogswitchesandrelatedcircuit,thecontrolsignalsfromthecomputer'sparallelporttoprovideandmeetshownintable1.Table1TherelationbetweenchannelselectionandportoutputCommunicationsportoutputBinarycodeChannelselectionselectchannel00001100122010330114410055101661107711188-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,goodaccesscontrolmodulesanddataacquisitionmodulesynchronizationisparticularlyimportantbecausedifferentchannelsofdatawordstorageneedsofthecorrespondingdatabufferpool,whichiscontrolledbysoftware.3 softwaredesignThewholesystemsoftwaredesignisthemostimportantpart.Softwaresystemfromthebottomofthecommunicationprotocolcanbedividedintofunctionalthree-tiermoduleanduserinterface.Softwaredesignintheuseofmulti-threadedWindowstechnology,thetechnologyfordatacollectionprocedurescaneffectivelyacceleratethereactiontimeandincreasetheefficiencyofimplementation.Theproceduresusedinaseparatethreadfordatacollection,sotheguaranteedmaximumenergycollectionofreal-time;usinganotherthreadatthesametimedataprocessing,suchprocedurestoavoidasingle-threadedthesametimeonlytheimplementationofafunctionaldeficiencies.Especiallywhentheamountofdatacollection,dataprocessingtask,usingmulti-threadedtechnologywillgreatlyimprovetheefficiencyofthesystemasawhole.3.1 DataAcquisitionModuleDataacquisitionmodulestoeightchannelsofdatainacycleofalltheacquisitiontothecomputer,andsavethechannel,andthecorrespondingdatainthebuffer.ItsproceduresdiagramshowninFigure2.wordFig2 FlowdiagramofdataacquisitionAtthebeginningofprocedures,withthechoiceofcontrolandstoredatabufferatthesametimetoswitchtothesamechannel,8-waydatacollectioncycleandcommandjudgement,intheendnotreceivedorders,hasrecyclingcollectiontodo.Multi-channeldataacquisitionprocessthedatavulnerabletointerference,especiallyinthefast-channelswitching,thedatavulnerabletofluctuations,asshowninFigure3.Atthistimeifthedatacollection,willbecollectingthewrongdata,theneedtoaddsomesoftwarealgorithmstopreventthisfromhappening.Ifwedeveloptheautomateddatatrackingalgorithmtoautomaticallytrackeachchanneldatatodeterminewhetherthechannelinastablestate,andonlythestabilityofdatawordacquisition,thevolatilityofotherdata.Inaddition,thesoftwarecanalsoaddsomefilteringalgorithm(suchaslimitingfilter,etc.)tofilteroutman-madeinterferenceorotherfactorscausedbythemutationdata.Limitingfilterfor（1）Figure3 channelswitching,thedatavolatilityWhenthenewcollecteddataandthedatabeforeadifferencetotheabsolutevalueofmorethanonesetofvaluesthatthedataisinvalid,andthepreviousdatafromthecurrentdata.3.2 DataAnalysisModuleInthedataanalysismodulecanbeaddedifthealgorithmanalysis,graphicsdisplayandprintoutput,andotherusefulfeatures,suchasgyroscopesandstabilityinthestandarddeviationalgorithmcanfunctioninthecourseoftestingreal-timecalculationofzerostability,andthroughchartshows.Zerostabilitycalculationformulaasfollows:（2）Accordingtofirst-(2)toprepareanalgorithmfunction,andthencallintheanalysismodule.AnalysismodulediagramoftheprocedureshowninFigure4.wordFigure4 dataanalysisprocessflowchartBecausethesystemusesmulti-threadedtechnology,inthecycleofoperationandwillnotaffecttheacquisitionmodule'soperation.Themodulealsoinitsalgorithminthefunctionofanyexpansion,formingaalgorithmtoadapttodifferentproceduresfordataanalysis.Inaddition,softwaredesign,afriendlyuserinterfaceisnecessaryintheprocessofthefunctionsfromthepackage,throughaunifiedinterfacetousers,toreduceoperatingdifficultiesandenhanceefficiency.4 systemtestresultsFigure5to8intheanalysisofdataacquisitionsystems,atthesametimetwothree-axisgyroandasingleaxisgyroscopetotalofsevenroadtestdataofthewordsituation.Itsprecisedatacollection,dataanalysiscanbeconductedatthesametime,andthroughreal-timecharts,user-friendly,easytooperate.Figure5 8DataCollectionandAnalysisSystem5 ConclusionMulti-channeldataacquisitionandanalysissystemforthehardwarerequirementssimple,easytosetup,canbeappliedtovarioustestsoccasions,itcanalsotestmultipleproducts,therebyreducingthecostandenhanceefficiency.Asaresultofamulti-threadedtechnology,thespeedofdataacquisitionsystemsandhardwareonly(instrument)andtheresponsespeedofthespeedofCommunication.Withthecollectionandanalysissoftwarealgorithmhasnothingtodo.PADprogrammingtoolscanbeusedtodevelopadatacollection,dataanalysis,graphicsdisplayandprintoutput,andotherpowerfulfeaturesandfriendlyuserinterfaceofoursoftware.Softwaremodulardesignandeasytocarryoutexpansion,accordingtodifferentalgorithmfordataanalysisattherequestofupgrades,andhardwarecanremainthesame.Thesystemgivefullplaytotheuseofcomputersandmeasuringinstrumentsofmutualcommunication,automationandtestadvantage.word多路數(shù)據(jù)采集與分析系統(tǒng)的設(shè)計及應(yīng)用摘要：介紹了用一臺PC機和一臺測量儀表組成的 8路數(shù)據(jù)采集與分析系統(tǒng)。該系統(tǒng)可并行測多個產(chǎn)品，從而降低測試成本，提高工作效率。給出了系統(tǒng)硬件結(jié)構(gòu)和軟件流程圖，并介紹了該系統(tǒng)在陀螺測試中應(yīng)用。關(guān)鍵詞：通信端口；數(shù)據(jù)采集；陀螺；測試隨著計算機技術(shù)的發(fā)展和測量儀表的數(shù)字化，通常利用計算機和測量儀表相互通信進行數(shù)據(jù)的實時采集，并利用計算機強大的運算能力進行數(shù)據(jù)的分析處理。特別在數(shù)據(jù)量大、測量時間長的場合，如陀螺零位穩(wěn)定性測試，利用計算機對測量儀表進行自動控制、自動數(shù)據(jù)采集分析顯得尤為重要，可節(jié)省大量人力和物力，提高工作效率，降低成本，常規(guī)的測試法通常一臺測量儀表在同一時間只能測試一個產(chǎn)品，即一臺計算機和一臺測量儀表組成的測試系統(tǒng)只能進行串行測試。若要同時測試多個產(chǎn)品，就需多個系統(tǒng)，在測試產(chǎn)品量較大時，工作效率低，如組成多套測試系統(tǒng)，增加了成本。先介紹一個用一臺PC機和一臺測量儀表組成的8路數(shù)據(jù)采集與分析系統(tǒng)，可同時進行多套產(chǎn)品的測試，在不增加成本的基礎(chǔ)上，充分發(fā)揮了計算機自動測試的優(yōu)勢，提高了工作效率。1系統(tǒng)原理該系統(tǒng)有硬件系統(tǒng)和軟件系統(tǒng)組成。一臺PC機通過RS232端口和一臺測量儀表相連接，PC機并行端口（LPT）和一個8路通道選擇器相連，一個8路連接頭將通道選擇器分別與多個測試產(chǎn)品連接。系統(tǒng)的工作原理如圖 1所示。測試過程中，計算機通過并行端口控制 8路通道選擇器，分別打開不同的通道，各通道數(shù)據(jù)通過選擇器傳送到測量儀表中，測量儀表再通過RS232端口把數(shù)據(jù)發(fā)送到計算機中保存，在一個周期內(nèi)完成所有通道的數(shù)據(jù)采集，這樣就實現(xiàn)了同時測試多個產(chǎn)品的功能。圖1系統(tǒng)工作原理框圖在整個測試過程中，所有的控制操作都有軟件自動完成，不需人為干預(yù)。2硬件設(shè)計該系統(tǒng)主要是用計算機自帶的 RS232通信端口和數(shù)字化測量儀表的通信端口連接通信，再利用LPT并行端口對一個8路通道選擇器進行通道控制。8路通道選擇器利用一個 8選1的模擬開關(guān)和相關(guān)電路組成，它的控制信號由計算機的并行端口提供，并滿足表 1所示。表1通道選擇器和通信端口輸出的對應(yīng)關(guān)系通信端口輸出二進制碼通道選擇器選擇通道0000110012201033011441005510166110771118word8路通道選擇器業(yè)可使用單片機， 但需額外的控制，選擇RS232串口作為數(shù)據(jù)傳輸端口，是因為 RS232端口是計算機和測量儀表上的標準配置，相互通信不需額外的硬件，使用方便。另外，串行通信一次只傳 1個位，處理的數(shù)據(jù)電壓只有一個標準電位，因此較不易發(fā)生數(shù)據(jù)錯誤。并行端口可在一次的數(shù)據(jù)傳輸中傳輸8個位，數(shù)據(jù)傳輸速度快，但易發(fā)生數(shù)據(jù)干擾。在傳輸距離較短、傳輸?shù)臄?shù)據(jù)量較大的情況下，可采用并行端口（如 GPIB、LPT等）進行通信。另外，由于LPT端口可并行傳輸信號，因此適合用作通道選擇器的控制端口。系統(tǒng)工作過程中，通道控制好模塊和數(shù)據(jù)采集模塊的同步顯得特別重要， 因為不同通道的數(shù)據(jù)需要存儲在對應(yīng)的數(shù)據(jù)緩沖池中，這由軟件進行控制。3 軟件設(shè)計軟件設(shè)計是整個系統(tǒng)中最重要的部分。軟件系統(tǒng)從下至上可分為通信協(xié)議層、功能模塊和用戶界面三層。在軟件設(shè)計中采用Windows多線程技術(shù)，此技術(shù)進行數(shù)據(jù)采集可有效加快程序的反應(yīng)速度，增加執(zhí)行的效率。該程序中采用一個單獨的線程進行數(shù)據(jù)采集，如此能量最大限度的保證采集的實時性；采用另一個線程同時進行數(shù)據(jù)處理，這樣避免了單線程程序同一時間只能執(zhí)行一個功能的缺點。尤其當采集的數(shù)據(jù)量大、數(shù)據(jù)處理任務(wù)重時，采用多線程技術(shù)將極大地提高整個系統(tǒng)的工作效率。3.1數(shù)據(jù)采集模塊數(shù)據(jù)采集模塊把8個通道的數(shù)據(jù)在一個周期內(nèi)全部采集到計算機中， 并保存在和通道號相應(yīng)的數(shù)據(jù)緩沖器中。其程序框圖如圖 2所示。word圖2數(shù)據(jù)采集程序流程圖程序開始時，控制同代選擇器和存儲數(shù)據(jù)的緩沖器同時切換到相同的通道號，循環(huán)采集8路數(shù)據(jù)和進行指令判斷，在沒有接受到結(jié)束指令時，一直做循環(huán)采集。多通道數(shù)據(jù)采集過程易發(fā)生數(shù)據(jù)的相互干擾，特別是在通道的快速切換時，數(shù)據(jù)易發(fā)生波動，如圖3所示。這時若進行數(shù)據(jù)采集，將采集到錯誤的數(shù)據(jù)，故需在軟件中加入一些算法來避免這種情況發(fā)生。如我們開發(fā)的數(shù)據(jù)自動跟蹤算法能自動跟蹤每個通道的數(shù)據(jù)，判斷該通道是否處于穩(wěn)定狀態(tài)，且只采集穩(wěn)定狀態(tài)的數(shù)據(jù)，忽略其他的波動數(shù)據(jù)。另外，還可在軟件中加入一些濾波算法（如限幅濾波法等）過濾掉人為或其他干擾因素所造成的突變數(shù)據(jù)。限幅濾波算法為（1）圖3通道快速切換時出現(xiàn)的數(shù)據(jù)波動當新采集到的數(shù)據(jù)和前一個數(shù)據(jù)的差的絕對值超過一個給定的值時 ，認為該數(shù)據(jù)無效，而取前一個數(shù)據(jù)為當前數(shù)據(jù)。數(shù)據(jù)分析模塊在數(shù)據(jù)分析模塊中可以加如算法分析、圖表顯示和打印輸出等有用的功能，如陀螺零位穩(wěn)定性標準差算法功能就可在測試過程中實時計算零位穩(wěn)定性，并通過圖表顯示。零位穩(wěn)定性計算式為：（2）先根據(jù)式（2）編寫出一個算法函數(shù)，然后在分析模塊中調(diào)用。分析模塊的程序框圖如圖4所示。word圖4數(shù)據(jù)分析程序流程圖由于系統(tǒng)采用了多線程技術(shù)，在分析循環(huán)運行時并不會影響采集模塊的運行。在該模塊中還可對其算法功能進行任意的擴充，形成一個算法程序庫以適應(yīng)不同的數(shù)據(jù)分析。另外，在軟件設(shè)計中，一個友好的用戶界面是必須的，把從程序中的功能封裝起來，通過一個統(tǒng)一的界面提供給用戶，有利于降低操作難度，提高工作效率。4 系統(tǒng)測試結(jié)果圖5為8路數(shù)據(jù)采集于分析系統(tǒng)，同時進行2個三軸陀螺和1個單軸陀螺共7路數(shù)據(jù)的測試情況。其采集的數(shù)據(jù)精確，能同時進行數(shù)據(jù)分析，并通過圖表實時顯示，界面友好、操作方便。圖58路數(shù)據(jù)采集與分析系統(tǒng)5 結(jié)束語多路數(shù)據(jù)采集與分析系統(tǒng)對硬件的要求簡單， 容易組建，可應(yīng)用在各種測試場合，它可同時測試多個產(chǎn)品，從而降低測試成本，提高工作效率。由于采用了多線程技術(shù)，該系統(tǒng)的數(shù)據(jù)采集速度只與硬件 （測量儀表）的響應(yīng)速度和不斷口通信速度有關(guān)。而與軟件采集和分析算法無關(guān)。利用PAD編程工具可開發(fā)出具有數(shù)據(jù)采集、 數(shù)據(jù)分析、圖表顯示及打印輸出等強大功能和友好用戶界面的配套軟件。軟件按模塊化設(shè)計，易進行功能擴充，可根據(jù)不同數(shù)據(jù)分析算法的要求進行升級， 而硬件可保持不變。該系統(tǒng)充分發(fā)揮了利用計算機和測量儀表相互通信，進行自動化控