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1、外文资料SelectingtheRightDataAcquisitionSystemEngineersoftenmustmonitorahandfulofsignalsoverextendedperiodsoftime,andthengraphandanalyzetheresultingdata.Theneedtomonitor,recordandanalyzedataarisesinawiderangeofapplications,includingthedesign-verificationstageofproductdevelopment,environ
2、mentalchambermonitoring,componentinspection,benchtoptestingandprocesstrouble-shooting.Thisapplicationnotedescribesthevariousmethodsanddevicesyoucanusetoacquireit,recordandanalyzedata,fromthesimplepen-and-papermethodtousingtoday'ssophisticateddataacquisitionsystems.Itdiscussestheadva
3、ntagesanddisadvantagesofeachmethodandprovidesalistofquestionsthatwillguideyouinselectingtheapproachthatbestsuitsyourneeds.1.IntroductionIngeotechnicalengineering,wesometimeencountersomedifficultiessuchasmonitoringinstrumentsdistributedinalargearea,dangerousenvironmentofworkingsiteth
4、atcausesomedifficultyforeasyaccess.Inthiscase,operatorsmayadoptremotecontrol,bywhichalargeamountofmeasureddatawillbetransmittedtoaobservationroomwherethedataaretobecollected,storedandprocessed.Theautomaticdataacquisitioncontrolsystemisabletocompletethetasksasregularautomaticdatamoni
5、toring,acquisitionandstore,featuringhighautomation,largedatastorecapacityandreliableperformance.Thesystemiscomposedofacquisitioncontrolsystemanddisplaysystem,withthefollowingfeatures:1.No.ofChannels:32(itcanbeincreasedordecreasedaccordingtouser'srealneeds.)2.Scanningduration:decided
6、byuser,fastest32points/second3.Storecapacity:20G(itmaybeincreasedordecreased)4.Display:(a)Tableofparameter(b)Historytendency(c)Columngraphics.5.Function:realtimemonitoringcontrol,warning6.Overalldimension:50cm×50cm×72cmDataacquisitionsystems,asthenameimplies,areproductsand/orprocess
7、esusedtocollectinformationtodocumentoranalyzesomephenomenon.Inthesimplestform,atechnicianloggingthetemperatureofanovenonapieceofpaperisperformingdataacquisition.Astechnologyhasprogressed,thistypeofprocesshasbeensimplifiedandmademoreaccurate,versatile,andreliablethroughelectronicequi
8、pment.Equipmentrang
