Beam Forming of Lamb Waves for Nondestructive Testing of Plates

Abstract

For wide range defect detection in plate, acoustic beam optimization technique was investigated. The synthesis wave field obtained from the basic phased-addition is prone to be influenced by the noise and the resolution is low. To improve the performance of beam forming of array, the synthesis acoustic field is processed with amplitude weighting. The experimental data have been processed with phase shift and amplitude weighted optimization. It is shown that the proposed beam forming technique with transducer array can recognize the features in plate.