Title of Paper:
Lamb Wave Frequency Diverse Array
Journal:
IEEE Transactions on Ultrasonics, Ferroelectrics, and Frequency Control
Summary:
The imaging method based on the conventional phased array can only realize angle focusing. To break through the above limitations, Frequency Diverse Array (FDA) is firstly introduced from radar to Lamb wave, which opens up a possibility to realize angle-range focusing in damage localization. The energy pattern of FDA without considering the features of radar signals is re-derived and a corresponding FDA focusing imaging method for Lamb wave is developed. In the presented method, by appending various frequency offsets to the redesigned anti-dispersive excitations, the desired FDA focusing and the dispersion elimination for Lamb wave are achieved simultaneously. Furthermore, based on full matrix capture being the data acquisition approach, a novel total focusing is realized with comprehensive consideration of positive and negative frequency offsets. Benefiting from the FDA focusing, compared with …
Co-author:
Yanfeng Lang, Zhibo Yang, Laihao Yang, Xuefeng Chen
Papers
