信号相关性分析及其在超声检测中的应用

AnIntroductiontoRelatedAnalysisofSignalandItsApplicationinUltrasonicTest孙秋菊韩焱(,030051):,MATLAB,,:;;,(),,,,,,,,,,,,,1;,111,,1x(t)x(t),1,x(t)t=t1t=t1+T,Tx(t)Rx(S):Rx(S)=limTy]1TT0x(t)x(t+S)dt112,2(a)x(t)y(t)ty(t)t+STRxy(S):Rxy(S)=limTy]1TT0x(t)y(t+S)dt22,,:(1)(2),,MATLAB,:,,m}5计量与测试技术62005年第32卷第12期,,,P,0,1,x1,x2,x1x2,,:33x1x2,,,,3,,,,,,,,,,,,,,,):4,,,A/D,,,,4,,,,,[1]11[J],2002,4(3)1[2]1[M]1,19911[3],1[M]1,19971[4],1CPLD[J]1,2004,19(2)1:,,::030051,(030051):2005-09-08(27),20min,(48h),,,35/ml,10%,[1]11,2001111[2]1200120021,2002111[3]11,20001[4]111[5]11,2000.21[6],11,1998.61[7]11,1998,141[8]1CIE11[9],11,2002.91:,,::1500404197#,,(150040):2005-09-19孙秋菊等:信号相关性分析及其在超声检测中的应用m~