数字化炉管超声自动检测系统

(,430071),,DIGITALAUTOMATICULTRASONICTESTINGSYSTEMFORSTOVETUBESOFPETROCHEMISTRYChengJianzheng(WuhanInstituteofPhysicsandMathematics,AcademiaCinica)AbstractAdigitalautomaticultrasonictestingsystemdevelopedforstovetubesofpetrochemistrywasintro2ducedincludingthechoiceoftheangleofatransducerandthegradingoftubes.Thetestingresultsofpetrochemi2calfactoryshowedthatthesystemcouldbeusedforonlinetestingreliablyandefficiently.KeywordsDigitizationAutomaticinspectionUltrasonicinspectionStovetube,,,,,,,,,,,,,,,,,,,,1,,,,,1,,,,,A,B,C,A,;B,;C19352212200012NDTVol.22No.12Dec.2000©1995-2004TsinghuaTongfangOpticalDiscCo.,Ltd.Allrightsreserved.,,öö,W&WTMLABAC1057,,,,,AöD,,,2,,,2AA1,LT,BlBt,BtBl,[1]sinAcl1=sinBlcl2=sinBtctcl1cl2LctT2Bl=90,A1=arcsin(cl1öcl2)Bt=arcsin(röR)(r,R),A2=arcsin(cl1öctröR)20128mm12mm(cl1=1480mös,cl2=5900mös,ct=3330mös),14.5,21.2,,A21.2,1MHz,22.7,,55mm,,2,3,4.56.5mm,,,3,3.5mm33,,,,,n[2]f(i),nfq(i)=1nnj=1f(ij)f(t)fq(t)=0.7A0.30.7B0.3C4(1)(2),(3)(571)045:©1995-2004TsinghuaTongfangOpticalDiscCo.,Ltd.Allrightsreserved.,,,,Ê,:1818G:518067:[phone],6867090:[phone]URL:http:öö(),20,CCBX,,;,;,,,,,(540)(4),(5)(6)5,4,,1,..:,1991.42,..:,1996.:20002052191752212200012NDTVol.22No.12Dec.2000©1995-2004TsinghuaTongfangOpticalDiscCo.,Ltd.Allrightsreserved.