-
公开(公告)号：US20250076260A1
公开(公告)日：2025-03-06
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.
-
2.发明公开公开(公告)号：US20240037699A1
公开(公告)日：2024-02-01
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.
-
公开(公告)号：US20220268739A1
公开(公告)日：2022-08-25
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.
-
-
Search Results
3
records
(took 0.015 seconds)
