Full-focusing phase coherence factor imaging method for wedge coupling mode

• Main Authors: XIE YUN, ZHANG XIAOBIN, ZHOU LUJING, LIU JINHAO, WU JINHU, DOU JIAMING
• Format: Patent
• Language: Chinese; English
• Published: 20.01.2023
• Subjects: INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIRCHEMICAL OR PHYSICAL PROPERTIES; MEASURING; PHYSICS; TESTING

The invention discloses a full-focusing phase coherence factor imaging method for a wedge coupling mode, which comprises the following steps of: firstly, measuring attenuation coefficients of different transmitting-receiving acoustic beams in a coupling model through an organic glass reflection method, and correcting full-matrix captured data, so that the subsequent imaging reliability is improved, and the defect energy uniformity is improved; secondly, through phase coherence factor weighted imaging of threshold value fusion based on correction data, the complexity of a traditional phase imaging algorithm model is reduced, real defect signals are reserved, and meanwhile artifact parts in an image are removed; through the method, the problem that the imaging reliability is reduced due to energy attenuation of acoustic beams in a wedge coupling model when a full-focusing imaging algorithm faces a multilayer medium is solved, and the image defect energy uniformity is improved. On the basis, phase information in