热喷涂涂层厚度的超声无损检测方法研究(3)

时间:2025-03-10

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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 ……

热喷涂涂层厚度的超声无损检测方法研究(3).doc 将本文的Word文档下载到电脑

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