激光超声技术在无损检测中的应用  

Application of Laser Ultrasonic Technique in Non-destructive Testing

作　　者：郭佳[1] 李四海[1] 宁宁[2] 李闵行[2] 张昭[2] 王丹[2] 

机构地区：[1]西北工业大学自动化学院,西安710072 [2]中国飞机强度研究所结构无损检测及健康监测研究室,西安710065

出　　处：《航空工程进展》2014年第4期487-490,501,共5页Advances in Aeronautical Science and Engineering

摘　　要：激光超声检测技术作为一种新兴的无损检测方法,以其非接触、点式检测及对复杂形状试件检测效率高等显著优势,逐渐进入了人们的视线。介绍激光超声技术的原理及优点,制作带预置缺陷的复合材料层压板试件,使用激光超声检测系统,分别采用穿透法和脉冲反射法两种手段对含有预置缺陷的复合材料层压板进行验证性检测,均能检出2mm的预置缺陷。通过与采用压电探头的传统超声检测系统的检测结果对比,表明激光超声检测系统可以达到和传统超声检测系统一致的检出率。As a new nondestructive detection method,laser ultrasonic,which gradually goes into our sight,is non-contact,point detection and have the significant advantage in the complex shape sample test with high efficiency.The principle and advantages of laser ultrasonic technique is introduced,and the composite laminates specimen with preset injury is made.The penetration method and pulse reflection method are used to test the sample,which is composite laminates containing apreset damage.Results show that2mm preset defects could be detected by both methods,which can reach the same detection-rate as a ultrasonic test system with a conventional piezoelectric probe.

关 键 词：非接触性 复合材料层压板 无损检测 激光超声 穿透法 脉冲反射法 

分 类 号：TN247[电子电信—物理电子学]