激光声表面波技术在材料加工表面损伤检测中的应用

Application of laser surface acoustic wave technology in surface damage detection of material processing

激光声表面波技术是一种新兴的无损检测方法,在材料加工表面损伤评估中展现出独特优势。本文重点探讨了该技术在表面裂纹、粗糙度和热损伤定量表征方面的应用。通过激光激发表面波并分析其传播特性,实现了高灵敏度、强定量化能力的损伤检测。优化激励-接收方案和信号处理算法,可进一步提升检测性能。实验研究表明,表面波的时频域特征参数与损伤量纲间存在确定性关联,为工程应用奠定了基础。

Laser surface acoustic wave technology is an emerging non-destructive testing method that exhibits unique advantages in surface damage assessment during material processing.This article focuses on the application of this technology in the quantitative characterization of surface cracks,roughness,and thermal damage.High sensitivity and strong quantification ability for damage detection have been achieved through laser excitation of surface waves and analysis of their propagation characteristics.Optimizing the incentive reception scheme and signal processing algorithm can further improve detection performance.Experimental studies have shown that there is a deterministic correlation between the time-frequency domain characteristic parameters of surface waves and the damage dimension,laying the foundation for engineering applications.