公开(公告)号：US12007362B2

公开(公告)日：2024-06-11

申请号：US17549908

申请日：2021-12-14

Applicant: Dalian University of Technology

Inventor： Shijie Jin ,  Li Lin ,  Chenfei Liu ,  Zhongbing Luo

IPC: G01N29/06 ,  G01N29/44

CPC classification number: G01N29/0645 ,  G01N29/4472 ,  G01N2291/023

Abstract: A method for reconstructing the crack profiles based on the composite-mode total focusing method (CTFM), including: selecting the parameters for phased array ultrasonic testing; acquiring the A-scan signal matrix; establishing the coordinate system and grid division of the region of interest (ROI); determining the wave modes; solving the positions of the refracted points; reconstructing the image by CTFM; and realizing the quantification, positioning, and orientation of cracks. The A-scan signal matrix including 21 views is acquired. Based on Fermat's principle, the refracted points at the interface between wedge and sample for the 21 views are calculated, to obtain the corresponding amplitude for each view in the ROI. For each reconstruction point, the strongest response is selected from the 21 views. The profiles of the cracks with different orientation angles are reconstructed by CTFM.

公开(公告)号：US20220107290A1

公开(公告)日：2022-04-07

申请号：US17549908

申请日：2021-12-14

Applicant: Dalian University of Technology

Inventor： Shijie Jin ,  Li Lin ,  Chenfei Liu ,  Zhongbing Luo

IPC: G01N29/06 ,  G01N29/44

Abstract: A method for reconstructing the crack profiles based on the composite-mode total focusing method (CTFM), including: selecting the parameters for phased array ultrasonic testing; acquiring the A-scan signal matrix; establishing the coordinate system and grid division of the region of interest (ROI); determining the wave modes; solving the positions of the refracted points; reconstructing the image by CTFM; and realizing the quantification, positioning, and orientation of cracks. The A-scan signal matrix including 21 views is acquired. Based on Fermat's principle, the refracted points at the interface between wedge and sample for the 21 views are calculated, to obtain the corresponding amplitude for each view in the ROI. For each reconstruction point, the strongest response is selected from the 21 views. The profiles of the cracks with different orientation angles are reconstructed by CTFM.