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焊缝缺陷的超声检测与定位系统分析word格式论文
AbstractWiththedevelopmentofweldingtechnology,weldedstructureisbeing widelyusedinconnectionandsealsituationofmodernindustry.Thequalityof holisticstructuredependsonthereliabilityofweldedseam.Usuallyweldedseam bearshightemperature,highpressandevencorrodentenvironment;thereforeit mightstressconcentrationorevencollapsingduringattendedtime.Inorderto avoiddisasterhappens,developedcountriespaymuchattentiontoproceedNDT tolarge-scalestructureandlongevityevaluationofin-serviceweldedbeam. Unfortunatelymanyproblemsstillexistduringfielddetection:savedefectdata; undetected;defectallocationandsoon.Tosolvetheseproblems,thisarticlewilldevelopanultrasonicdetectand defectallocationsystem.Thissystemcanproceedfielddetectionwhenconnected withanote-bookthroughUSBinterface,thispatternextendtheapplicability. Anditiscomposedbytwoparts.Oneisultrasonicsignalcollection device; anotherpartisultrasonicprobeallocationtransducerdevice.Thefunctionofthis systemasfollows:displaythemotionrouteoftheprobeinreal-time;generate thetopviewandsideviewofthedefectautomatically.Thesefunctionssolvethe problemthathowtoobtainthedefectinformationduringdetectionverywell; furthermorethetwoviewsrealizedefectallocationandpatterndescription.Data savingprovideareliable foundationfordatamanipulation and welded beam lifetimeevaluationlater.Tocertificatetheprecisionandapplicationvalue,wescanartificialdefect and real welded beam respectively by using the ultrasonic defect system we developed.Theresultofartificialdefectscanshowsthattheprecisionofthe systemmeetdetectrequest.ByscanningarealweldedbeamandcomparingX- Rayimage,TOFDviewanddefectviewgivenbyourdetectsystem,thisdetect systemrepresenthightheorysignificance.Inaword,theportabletypedigital ultrasonicdefectsystemthisarticledevelopedimplementsdefectdetectionand defectallocation.KeywordsNDT;ultrasonic;defectlocalization;dataprocessing目录摘要...............................................................................................................................IAbstract....
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