热喷涂涂层厚度的超声无损检测方法研究(3)
时间:2025-03-10
时间:2025-03-10
无勋检测
ABSTRACT
ABSTRACT
thethicknessofthermalsprayingcoatedlayeris
qualityevaluation,andis
anaUltrasonicmeasuringonononeofthehotspotintheresearchSotheresearchondifficultyinultrasonicNDT.onultrasonicNDTmethodhasimportanteffectthethicknessof
thermalsprayingcoatedlayer.Inthepresentwork,theadvanceddigitalsignalprocessing(DSP)technology
beenwhichisthewavelettransformmodulusmaximahaswhichappliedtothetransformandprocessingoftime—domainsignalsacquired
fromfromultrasonicnon—destructivetesting,thepurposeistofinduseful
theultrasonicsignalswhichcaninformation
theshowthethicknessofcoatedonlayer.Thus,theapplicabilityandaccuracyofultrasonicnon-destructivetestingthicknessof
coatedlayercanbevalued.Intheproject,surfacecoatedlayersofthermalsprayingsamplehavebeenstudied.
Thispaperfirstlyestablishedultrasonicecho
characteristicinformationismodule,andbasedonthismoduleanalyzedwhichisconnectedthethicknessofcoatedlayer,andthisinformationisthetimewhichreflectionechoisinceptedbydetectorfromthe
ofwavelet
waveletinterfaceofcoatedlayerandbasalbody.Basedongoodperformance
oftransformintime—frequencydomainandsignalsingularitydetecting,transformmaximamethodwasaccessed
excavatedtheuseful
wavelettoprocessthesignalscoatedcoatedlayegtheninformationonthethicknessoflayerinthefigureofofcoatedlayentransformmodulusmaxima,and
onthencalculatedthethicknessTheresult
principlethethicknessofepoxylayerwithultrasonicNDTmethodshowsthatthewaveletoftransformmodulusmaximamethod
signals,andthe
coatedisapplicableinthesingularitydetectionofthecoatedlayersingularitycorrespondedtolayer
onthetimeultrasonicarrivedontheinterfaceofandbasalbody.Andultrasonicnon—destructivetestingmethodisapplicable
layer.thethicknessofcoated.
IntheresearchofultrasonicNDTmethodonthethicknessofcoatedlayer,the
sampleofA1coatedlayer,SAMandHAcoatedlayerweredetected.A—signalwas
directedcontacting,andcharacteristicinformationwaspickuponwavelet
transformmodulusmaximamethodbyMexhwavelet.Theresultsonthethicknessofpickup …… 此处隐藏:282字,全部文档内容请下载后查看。喜欢就下载吧 ……