基于Lamb波的电路板裂纹检测方法分析  

Analysis of Circuit Board Crack Detection Method Based on Lamb Wave

作　　者：沈显庆[1] 刘科钰 杨泽 张悦 王楷博 SHEN Xianqing;LIU Keyu;YANG Ze;ZHANG Yue;WANG Kaibo(Heilongjiang University of Science and Technology,Heilongjiangg150028,China.)

机构地区：[1]黑龙江科技大学,黑龙江150028

出　　处：《电子技术(上海)》2025年第1期50-52,共3页Electronic Technology

摘　　要：阐述为检测电路板中的裂纹,使用有限元软件建立有限元模型,研究了Lamb波与裂纹之间的相互作用。在模型中引入直裂纹和斜裂纹,以研究超声Lamb波在裂纹处的模式转换现象。数值模拟结果表明,在频厚积大于1 MHz·mm的情况下,反对称A0模式比对称S0模式更适合进行直裂纹检测;而对于斜裂纹,由于受到取向角度的影响,对称S0模式比反对称A0模式更适合进行检测。This paper explains that a finite element model is established using finite element software to study the interaction between Lamb waves and cracks to detect cracks in circuit boards,.In order to study the mode transformation of ultrasonic Lamb wave at the crack,straight crack and oblique crack are introduced into the model.The numerical simulation results show that the antisymmetric Ao mode is more suitable for direct crack detection than the symmetric So mode when the frequency thickness is greater than 1 MHz·mm,and the symmetric So mode is more suitable for oblique crack detection than the symmetric Ao mode because of the influence of orientation Angle.

关 键 词：电路板检测 LAMB波 有限元模型 对称S0模式 反对称A0模式 

分 类 号：TN41[电子电信—微电子学与固体电子学] TB55[理学—物理]