声-超声检测技术  

Acousto-Ultrasonic Testing Techniques

作　　者：常新龙[1] 尼涛[1] 艾春安[1] 

机构地区：[1]第二炮兵工程学院,西安710025

出　　处：《无损检测》2009年第5期381-385,共5页Nondestructive Testing

摘　　要：声-超声技术用以评估弥散缺陷分布以及由此产生的材料力学性质变化,已成功应用于金属、复合材料、粘接结构和木材等的无损检测。综述了声-超声检测技术发展现状。在阐述声-超声技术基本思想的基础上,分析了声-超声检测系统的组成及影响检测结果的各种因素。重点讨论了传播模型研究中的自然模态和频散模态分析,以及信号处理方法中的应力波因子法、超声波衰减率法和统计分析法等。最后对声-超声技术进一步研究的关键技术进行了展望。As a method of assessing diffusing defects in materials and the variety of mechanical properties, acousto-ultrasonic techniques have been successfully used in the NDT of the composites, bonding and lumber. This paper provides an overview of the acousto-ultrasonic techniques. Based on the principle of the technique, the implementation and the influence factors were discussed. A few emphasis aspects included the natural modes and dispersion modes in academic analysis, stress wave factors, ultrasonic decay rate and the statistic analysis. In the end a conclusion and some challenging issues were proposed.

关 键 词：声-超声检测技术 可重现性 自然模态 频散模态 应力波因子 超声波衰减率 平均时间 功率谱形心 

分 类 号：TG115.28[金属学及工艺—物理冶金]