涂层界面反射超声的梳状滤波效应及其结合质量成像检测研究

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振动与冲击 ›› 2024, Vol. 43 ›› Issue (9) : 234-240.

论文

周国正1，2，姜煜3，梁军1，2，姜大超1，2，袁懋诞3

作者信息 +

Comb filtering effect of reflected ultrasound on coating interface and interface bonding quality imaging detection

ZHOU Guozheng1,2, JIANG Yu3, LIANG Jun1,2, JIANG Dachao1,2, YUAN Maodan3

Author information +

文章历史 +

摘要

涂层结构的界面结合质量可以通过超声无损检测技术进行有效表征。基于涂层界面超声传播模型及其反射信号特征研究，发现其回波信号具有梳妆滤波效应。理论分析表明，超声反射系数和相位都会随界面刚度而变化，在此基础上基于梳状滤波效应构建了适用于界面结合强度检测的频域特征参数。利用高频水浸超声扫查系统对不同结合质量的涂层样品进行了成像测试，并与标准划格法测试结果对比。研究结果表明：在涂层结合强度差异较小的情况下，通过回波信号的反射系数和梳状滤波效应频域特征参数都可以区分结合质量为0级和2级样品，而频域特征参数能够显著提升结合质量成像结果的对比度。本研究将为大批量涂层界面质量无损、在线、全覆盖检测提供理论基础与技术支撑。

Abstract

The bonding quality of the coatings can be effectively characterized by ultrasonic nondestructive testing. This paper investigated the ultrasonic wave propagation at the coating interfaces and found that the reflected signals show clear comb filtering effect. Moreover, theory studies proved that the amplitude and phase of the reflected ultrasonic waves will change with the interfacial stiffness. Therefore, a spectral index based on the comb filtering effect was proposed to evaluate the bonding quality. Experiments of different coating samples were carried out by high-frequency ultrasonic scanning system, along with the destructive cross-cut test. The results show that the reflection coefficient and the spectral index can distinguish between samples of level 0 and level 2 from cross-cut test. In addition, the spectral index based on comb filter effect can significantly improve the contrast of the imaging results. This work will provide theoretical basis and technology support for online and full-coverage nondestructive testing of coatings.

导出引用

周国正1，2，姜煜3，梁军1，2，姜大超1，2，袁懋诞3. 涂层界面反射超声的梳状滤波效应及其结合质量成像检测研究[J]. 振动与冲击, 2024, 43(9): 234-240

ZHOU Guozheng1,2, JIANG Yu3, LIANG Jun1,2, JIANG Dachao1,2, YUAN Maodan3. Comb filtering effect of reflected ultrasound on coating interface and interface bonding quality imaging detection[J]. Journal of Vibration and Shock, 2024, 43(9): 234-240

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