Experimental study on defect imaging based on single Lamb wave mode in plate-like structures - Details

Author：

Liu, Zeng-Hua (Liu, Zeng-Hua.) (Scholars：刘增华) | Xu, Ying-Zan (Xu, Ying-Zan.) | He, Cun-Fu (He, Cun-Fu.) (Scholars：何存富) | Wu, Bin (Wu, Bin.) (Scholars：吴斌)

Indexed by：

EI Scopus PKU CSCD

Abstract：

Lamb　wave　technology　is　used　for　defect　detection　in　plate-like　structures.　It　is　easier　to　interpret　received　signals　and　to　identify　defects　if　single　mode　Lamb　waves　are　applied.　In　this　study,　piezoelectric　transducers　are　attached,　in　a　form　of　arrays,　on　the　top　and　bottom　sides　of　plate.　When　two　piezoelectric　transducers　at　the　same　locations　on　each　side　of　the　plate　are　excited　by　voltage　signal　simultaneously　in　phase　or　out　phase,　single　S0　mode　or　A0　mode　is　generated,　respectively.　In　combination　with　the　elliptic　imaging　algorithm　and　the　data　fusion　method,　single　Lamb　wave　mode　can　be　used　for　defect　imaging　for　multiple　signals　received　by　piezoelectric　transducer　arrays.　The　method　proposed　in　this　study　is　effective　to　obtain　two-dimensional　images　of　defects　and　detect　artificial　defects　in　plate-like　structures,　with　improved　recognition　ability　and　accuracy.

Keyword：

Ultrasonic waves Piezoelectricity Surface waves Piezoelectric transducers Indium plating Transducers Defects Plates (structural components) Data fusion Image enhancement

Author Community：

[ 1 ] [Liu, Zeng-Hua]College of Mechanical Engineering and Applied Electronics Technology, Beijing University of Technology, Beijing 100124, China
[ 2 ] [Xu, Ying-Zan]College of Mechanical Engineering and Applied Electronics Technology, Beijing University of Technology, Beijing 100124, China
[ 3 ] [He, Cun-Fu]College of Mechanical Engineering and Applied Electronics Technology, Beijing University of Technology, Beijing 100124, China
[ 4 ] [Wu, Bin]College of Mechanical Engineering and Applied Electronics Technology, Beijing University of Technology, Beijing 100124, China