YU Zhen-hua, YUAN Shen-fang, PENG Ge. Collocation of piezoelectric sensor array with star topology form and multipath scanning strategy for damage[J]. 2007, (11): 117-120.
YU Zhen-hua, YUAN Shen-fang, PENG Ge. Collocation of piezoelectric sensor array with star topology form and multipath scanning strategy for damage[J]. 2007, (11): 117-120. DOI: 10.13873/j.1000-97872007.11.001.
压电阵列星形布置与多路损伤扫查策略
摘要
针对复合材料结构的损伤主动监测进行研究。采用主动Lamb波和小波变换计算损伤散射信号的时间延迟
根据椭圆定位法进行损伤定位;提出压电传感器星形布置的优化布置方法
结合多路扫查
解决椭圆定位法的损伤监测盲区
从而扩大损伤监测范围、提高损伤判别的准确性
并能进行损伤程度的判别。通过实验系统验证了所提出方法的有效性。
Abstract
Active damage detection of composite structure is discussed.By calculating the arrival time difference of the disperse signal aroused by damage using active lamb wave and wavelet transform
damage position can be detected according to ellipse localization method.To overcome the dead area of detection by ellipse localization method
optimization collocation of piezoelectric sensors with star topology form is proposed with multi-path scanning
which widened the range of monitoring and improved the accuracy of damage identification.To some extent
the damage area also can be determined.The experiment of damage localization confirmes the advantages.
Lamb waves for the non-destructive inspection of monolithic and sandwich composite beams [J] . K. Diamanti,C. Soutis,J.M. Hodgkinson. Composites Part A . 2004 (2)
Selection of Lamb modes for detecting internal defects in composite laminates [J] . K. Maslov,T. Kundu. Ultrasonics . 1997 (2)