激光超声信号与缺陷定量检测机理研究
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摘要
提出了一种基于激光超声信号的金属表面缺陷定量检测方法,使用激光器在不同缺陷深度的金属铝板上激发超声信号,通过数字平均算法对超声信号进行预处理;将缺陷的理论能量衰减值精确到深度和宽度范围,得到理论能量衰减值与实际能量的比例系数;得到实际能量值与缺陷深度的关系式。研究结果表明:利用信号实际能量值求出的缺陷深度与实际缺陷深度相对误差范围为3%～20%,缺陷深度的相对误差降低10%。该方法实现了对缺陷深度的定量评价,具有一定可行性。
A method of quantitative detection of metal surface defects based on laser ultrasonic signal was proposed. The laser ultrasound signal was obtained by laser device,on a battery of aluminum plates with different depth defects. The signal was processed firstly by digital averaging algorithm. We calculated the theory energy consumption value of signal in the range of the depth and width of defect,and obtained the proportion coefficient between theory energy consumption value and practical energy. Relational expression,related to practical energy and depth of defect,can be obtained. Finally,The relative error range of the defect depth and the actual defect depth calculated by using the actual signal energy value is3% ～ 20%,and the relative error of the defect depth is reduced by 10%. The results showed that the method has realized the quantitative evaluation to the depth of defect,and it is feasibility.
A method of quantitative detection of metal surface defects based on laser ultrasonic signal was proposed. The laser ultrasound signal was obtained by laser device,on a battery of aluminum plates with different depth defects. The signal was processed firstly by digital averaging algorithm. We calculated the theory energy consumption value of signal in the range of the depth and width of defect,and obtained the proportion coefficient between theory energy consumption value and practical energy. Relational expression,related to practical energy and depth of defect,can be obtained. Finally,The relative error range of the defect depth and the actual defect depth calculated by using the actual signal energy value is3% ～ 20%,and the relative error of the defect depth is reduced by 10%. The results showed that the method has realized the quantitative evaluation to the depth of defect,and it is feasibility.
引文
[1]张丁凯,倪辰荫.全光学非线性混频技术用于微裂纹检测的实验研究[J].南京大学学报(自然科学版),2017,53(1):81-91.
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[4]刘帮俊,陈荣刚.无损检测及其在身管损伤评估中的应用[J].兵器装备工程学报,2018,39(1):71-75,83.
[5]LI Chumhui,LI Sinan.A comparison of laser ultrasonic measurements and finite element simulations for evaluating the elastic properties of tissue mimicking phantoms[J].Optics&Laser Technology,2012,44:866-871.
[6]马保全,周正干.航空航天复合材料结构非接触无损检测技术的进展及发展趋势[J].航空学报,2014,35(7):1787-1803.
[7]FIERRO G P M,MEO M.Nonlinear imaging(NIM)of flaws in a complex composite stiffened panelusing a constructive nonlinear array(CAN)technique[J].Ultrasonics,2017,74:30-47.
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[9]JUNG-RYUL LEE,SEE YENN CHONG.A time-of-flight mapping method for laser ultrasonic guided in a pipe and its application to wall thinning visualization[J].NDT&E International,2011(44):680-691.
[10]PUU-AN JUANG,CHING-CHIHTSAI.Analysis and measurement of lateral elliptic motion effect for an asymmetricdisc-type ultrasonic motor[J].Mechanical Systems and Signal Processing,2010(24):312-322.
[11]GUAN Jianfei,SHEN Zhonghua,NI Xiaowu,et al.Numerical simulation of the reflected acoustic wave components in the near field of surface defects[J].J.Phys.D:Appl.Phys.,2006,39(6):1237-1243.
[12]敦怡,师小红,王广龙,等.微纳米级裂纹的非线性超声检测[J].光学精密工程,2011,19(1):132-137.
[13]曾伟,王海涛,田贵云,等.基于能量分析的激光超声缺陷检测研究[J].仪器仪表学报,2014,35(3):650-655.
[14]V YU ZAOETSEV,GUSEV V E,NAZAROV V E,et al.Interaction of acoustic waves with cracks:elastic and inelastic nonlinearity mechanisms on different time scales[J].A-coustical Physics,2005,51(1):S67-S77.
[15]HONG K M,KANG Y J,CHOI I Y,et al.Ultrasonic signal analysis according to laser ultrasound generation position for the detection of delamination in composites[J].Journal of Mechanical Science and Technology,2015,29(12):5217-5222.
[16]秦峰,吴耀金,郭华玲.激光超声信号与裂纹能量作用机理研究[J].应用激光,2017,37(5):732-736.
[17]DONG LIMING,LI JIA,NI CHENYIN,et al.Crack detection of engine blade based on laser heating assisted surface acoustic waves generated by scanning laser[J].Chinese Journal of Lasers,2011,38(11):1103001-5.
[2]BRODA D.Modelling of nonlinear crack-wave interactions for damage detection based on ultrasound-A review[J].J.Sound and Vibration,2014(333):1097-1118.
[3]SUN Guangkai,ZHOU Zhenggan,LI Guangkai,et al.Developmet of an optical fiber-guided robotic laser ultrasonic system for aeronautical composite structure testing[J].Optil,2016,127(12):5135-5140.
[4]刘帮俊,陈荣刚.无损检测及其在身管损伤评估中的应用[J].兵器装备工程学报,2018,39(1):71-75,83.
[5]LI Chumhui,LI Sinan.A comparison of laser ultrasonic measurements and finite element simulations for evaluating the elastic properties of tissue mimicking phantoms[J].Optics&Laser Technology,2012,44:866-871.
[6]马保全,周正干.航空航天复合材料结构非接触无损检测技术的进展及发展趋势[J].航空学报,2014,35(7):1787-1803.
[7]FIERRO G P M,MEO M.Nonlinear imaging(NIM)of flaws in a complex composite stiffened panelusing a constructive nonlinear array(CAN)technique[J].Ultrasonics,2017,74:30-47.
[8]ZHANG C,CHENG L,XU H,et al.Structual damage detection based on virtual element boundary measurement[J].Journal of Sound&Vibration,2016,372:133-146.
[9]JUNG-RYUL LEE,SEE YENN CHONG.A time-of-flight mapping method for laser ultrasonic guided in a pipe and its application to wall thinning visualization[J].NDT&E International,2011(44):680-691.
[10]PUU-AN JUANG,CHING-CHIHTSAI.Analysis and measurement of lateral elliptic motion effect for an asymmetricdisc-type ultrasonic motor[J].Mechanical Systems and Signal Processing,2010(24):312-322.
[11]GUAN Jianfei,SHEN Zhonghua,NI Xiaowu,et al.Numerical simulation of the reflected acoustic wave components in the near field of surface defects[J].J.Phys.D:Appl.Phys.,2006,39(6):1237-1243.
[12]敦怡,师小红,王广龙,等.微纳米级裂纹的非线性超声检测[J].光学精密工程,2011,19(1):132-137.
[13]曾伟,王海涛,田贵云,等.基于能量分析的激光超声缺陷检测研究[J].仪器仪表学报,2014,35(3):650-655.
[14]V YU ZAOETSEV,GUSEV V E,NAZAROV V E,et al.Interaction of acoustic waves with cracks:elastic and inelastic nonlinearity mechanisms on different time scales[J].A-coustical Physics,2005,51(1):S67-S77.
[15]HONG K M,KANG Y J,CHOI I Y,et al.Ultrasonic signal analysis according to laser ultrasound generation position for the detection of delamination in composites[J].Journal of Mechanical Science and Technology,2015,29(12):5217-5222.
[16]秦峰,吴耀金,郭华玲.激光超声信号与裂纹能量作用机理研究[J].应用激光,2017,37(5):732-736.
[17]DONG LIMING,LI JIA,NI CHENYIN,et al.Crack detection of engine blade based on laser heating assisted surface acoustic waves generated by scanning laser[J].Chinese Journal of Lasers,2011,38(11):1103001-5.