南京航空航天大学学报2011，Vol.43Issue(2)：205-209,5.
压电阻抗技术在焊缝裂纹监测中的应用
Application of Electro-Mechanical Impedance Method in Crack Detecting of Welding Line
摘要
Abstract
A welding aluminum plate with several PZT sensors pasted on the surface is used as the research example. The change of the piezoelectric impedance inspirited by different frequencies of the excited signal is studied by analyzing the PZT impedance spectrum. An artificial neural network is constructed to locate the crack. Experimental results show that even small changes of structural state can be detected by the impedance changes of PZT patches. For the same PZT, different frequencies of the excited signal have different impedance changes. The characteristics representing the health of structure are chosen as the input vectors of the artificial neural network. The trained neural network can monitor and position the welding cracks quickly and correctly.关键词
裂纹/压电阻抗技术/人工神经网络/结构健康监测Key words
crack/ piezoelectric impedance technology artificial neural network structure health monitoring分类
信息技术与安全科学引用本文复制引用
卢翔,朱楚为,章建文,王宁,李允..压电阻抗技术在焊缝裂纹监测中的应用[J].南京航空航天大学学报,2011,43(2):205-209,5.基金项目
国家自然科学基金(50802043,50911140286)资助项目. （50802043,50911140286）
