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Patent Agency Ranking
公开(公告)号：US11635409B2
公开(公告)日：2023-04-25
申请号：US17742237
申请日：2022-05-11
Applicant: DALIAN UNIVERSITY OF TECHNOLOGY
Inventor： Zhongbing Luo , Li Lin , Song Zhang , Hong Wang , Shijie Jin , Zhiyuan Ma
Abstract: A multi-material inspection system and velocity measurement method of critically refracted longitudinal wave based on single-angle wedges belong to the field of nondestructive testing of high-end equipment. The method includes the following steps: designing a transmitting wedge and a receiving wedge with the same inclination angle, and building phased array ultrasonic-based inspection systems of critically refracted longitudinal wave; estimating a longitudinal wave velocity range of a material to be tested, calculating and optimizing a phased array ultrasonic delay law, and building a relation between a longitudinal wave velocity and an amplitude of critically refracted longitudinal wave; reading and interpolating the arrival time of a received signal, and calculating a longitudinal wave velocity of the material to be tested; determining an optimal delay law, and exciting and receiving a critically refracted longitudinal wave.
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2.发明授权公开(公告)号：US11915386B2
公开(公告)日：2024-02-27
申请号：US18262192
申请日：2022-11-25
Applicant: DALIAN UNIVERSITY OF TECHNOLOGY
Inventor： Li Lin , Zhiyuan Ma , Yijia Chen , Luoming Sun , Xiyu Xie
CPC classification number: G06T3/40 , G06T7/136 , G06T2207/10056 , G06T2207/20016 , G06T2207/30108
Abstract: A high-throughput microstructure characterization and reconstruction method of heterogeneous materials is provided. By extracting the features such as content, size and morphology of each constituent phase in the microscopic image of heterogeneous materials, and combining the principles of physical descriptor and texture synthesis method, the constituent phase with 10 microns scale, regular geometrical morphology and low content is characterized and reconstructed based on the physical descriptor, and the constituent phase with 100 microns scale, complex geometrical morphology and high content is characterized and reconstructed based on texture synthesis, and then the composition is adjusted to compensate for the overlapping pixels of each constituent phase to obtain batch reconstructed images.
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公开(公告)号：US12241871B1
公开(公告)日：2025-03-04
申请号：US18800210
申请日：2024-08-12
Applicant: DALIAN UNIVERSITY OF TECHNOLOGY
Inventor： Zhiyuan Ma , Li Lin
Abstract: The method for measuring thickness, roughness and interface stiffness of coating layer by using ultrasonic phase derivative spectrum which relates to technical field of the ultrasonic non-destructive testing. The method adopts an ultrasonic detection system which includes a sample of the coating layer, an ultrasonic flat probe, an ultrasonic flaw detector, a XYZ three-dimensional stepping device and a computer. The method derives UPDS (Ultrasonic phase derivative spectrum) when the ultrasonic wave is vertically incident on structure with three-medium and two-interface including coupled medium/coating layer/substrate, to conduct sensitivity analysis to identify the high sensitivity range of ultrasonic phase derivative spectrum to thickness, roughness and interface stiffness of coating layer, and to conduct correlation analysis to eliminate deviation introduced by initial phase of the reference signal and the detection signal, so as to achieve simultaneous quantitative characterization of thickness, roughness as well as interface stiffness of coating layer.
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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
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.
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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
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.
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