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2005274,,(,200030):,SM570(RMS),,:;;;:TG115.28:A:100026656(2005)0420176203ApplicationofBarkhausenNoisetotheMeasurementoftheResidualStressofFerromagneticMaterialsLUCheng2lei,NIChun2zhen,CHENLi2gong(ShanghaiJiaotongUniversity,Shanghai200030,China)Abstract:ThevoltagepulseandnoiseinreceivingcoilspositionedontheworkpiecesurfacetestedduetoBarkhauseneffectwascalledBarkhausennoise.Onthebasisofferromagnetictheory,themechanismofBarkhausennoisewasintroduced,andthesignaltransducerandsampling2processingsystemforthemeasurementofresidualstressofferromagneticmaterialsweredeveloped.Thechangeofpowerspectrumandrootmeansquare(RMS)obtainedbyBarkhausensignalmethodbeforeandafterheat2treatmentfortheweldofsteelSM570wasgivenbytrial,whichwascomparedwiththeresidualstressdatafromblind2holemethod.Althoughsomevaluableinformationwasgot,itcouldonlyevaluatetheresidualstressandheat2treatmenteffectqualitatively,moreresearchshouldbecarriedoutinordertogetquantitativedata.Keywords:Electromagnetictesting;Barkhauseneffect;Virtualinstrument;Residualstressmeasurement,1919,,,(BN),:2003209229,,,,,1,,,,,671:2005274H,(),,H=0,,180,1,,0X1,X1H0,H0=120MscosdEdxmax0MsE,X=0,1180,H0,X1X2,,X2X3,X3dE/dxX2,,[1]BN,,,22.12,:2(1)PCI1712D/A(/),20Hz4V(2),(3)CA3140PCI1712A/D(/)(4)[2]2.2,LABVIEW[3],LABVIEW(VI)VI:(1),,(2),,,,,(3)/,VIVI,[4],,(RMS),771:200527433.1SM570,,700mm299mm45mm3.21,max=185MPa,max=87MPa,53%1maxMPa1168118423696218084516794317340185873.3BNBN,,RMS3.3.1RMS,,X=1nn-1i=0X2iRMS32RMS,,X,Y,X26%,Y17%,3.3.2LABVIEW,3RMS2RMSVXYXY10.7281.0640.5960.95221.0801.1900.5940.70830.7660.9480.4820.79040.8980.7460.9120.8360.8680.9870.6460.822,,4,3,,25kHzXY,X43XYXY/Hz/V/Hz/V/Hz/V/Hz/V1250320.0279251510.0318251040.0199250350.01632250900.0403250340.0363252470.0112251050.03243250890.0295251490.0243251750.0168253220.01534252050.0264251030.0323251740.0166251770.0229251040.0310251090.0310251750.0160251590.0230(182)871:2005274(a)(b)6(a)(b)71.5mm,35mm,7a1mm,38mm6b7b7a,6a,6b7b,,,,,5,,,,,,;,,,:[1]MallatS.Atheoryformultiresolutionsignaldecompo2sition:thewaveletrepresentation[J].IEEETransPAMI,1989,11(7):674-693.[2].[J].,1997,19(2):32-34.(178)48%,Y25%[5]4(1)PCI1712LABVIEW,(2),,RMS,,(3),,(4),,:[1],,.[J].,2000,21(3).[2]ZhuB,JohnsonMJ,LoCCH,etal.MultifunctionalmagneticBarkhausenemissionmeasurementsystem[J].IEEETransonMagnetics,2001,37(3):20-22.[3].Labview[Z].2001.[4],.Labview[J].,2001,22(2):10.[5].Labview[Z].:,2000.281