公开(公告)号：US20180335403A1

公开(公告)日：2018-11-22

申请号：US15681186

申请日：2017-08-18

Applicant: UNIVERSITY OF ELECTRONIC SCIENCE AND TECHNOLOGY OF CHINA

Inventor： Yuhua CHENG ,  Libing BAI ,  Yonggang WANG ,  Jie ZHANG ,  Chun YIN ,  Shuai SHI ,  Xue CHEN

IPC: G01N27/82

Abstract: The present invention provides a method for simulating magnetic flux leakage based on loop current, the magnetic distribution of a single loop current is obtained by solid angle, then the magnetic field distribution of a semi-infinite solenoid is obtained based on the assumption of arrangement of loop currents in the magnetized specimen, and its equation is given; and the JA hysteresis model is introduced to obtain the distribution of quasi-static magnetic flux leakage field, on the basis of analyzing the relation between the distribution of a loop current on the surface of the defect and the excitation magnetic field, the distribution of quasi-static magnetic flux leakage field is obtained based on the semi-infinite solenoid.