南京信息工程大学学报Issue(5)：420-425,6.
Lamb波相控阵结构健康监测成像技术
Lamb wave phased array theory and its application in damage imaging for structural health monitoring
摘要
Abstract
The phased array beam steering is controlled and the Lamb wave phased array theory is discussed in de-tail.Phased array technology is used to control the time delay of the Lamb wave and to make the Lamb wave focus on the structure damage. The damage scattered signal is extracted by comparing the health signal and the damage signal.The Lamb wave signal direction is controlled by utilizing the time delay to the excitation signals and the dam-age scattered signals and the structure is monitored in all orientations. The processed signals are shown on the mapped image in gray-scale. The gray-scale in the mapped image from dark to light corresponds to the amplitude from low to high.The location where the max amplitude of the signals lie is the damage location in the structure.Fi-nally,the proposed method is verified by an experiment on aluminum sheet structure and the result shows that it is effective to identify the damage position of structure and to display the damage clearly.关键词
Lamb波/相控阵/结构健康监测/损伤图像Key words
Lamb wave/phased array/structure health monitoring(SHM)/damage image分类
通用工业技术引用本文复制引用
孙亚杰,张永宏,钱承山,张自嘉..Lamb波相控阵结构健康监测成像技术[J].南京信息工程大学学报,2014,(5):420-425,6.基金项目
国家自然科学基金 （）
