Method for simulating magnetic flux leakage based on loop current

US10551350B2 · kind B2 · utility

Assignee

• University of Electronic Science and Technology of China · CN

Inventors

• Yuhua Cheng · Beijing, CN
• Libing BAI · Sichuan, CN
• Yonggang Wang · Beijing, CN
• Jie Zhang · Suzhou, CN
• Chun-Hsiung Yin · Tainan, TW
• Shuai Shi · Summit, US
• Xue Chen · Qingshanqiao, CN

Key dates

• Filing date: Aug 18, 2017
• Grant date: Feb 4, 2020
• Expiry date: Jun 8, 2038

Classification

• Technology area (CPC G): Physics
• CPC primary: G06F30/20
• WIPO field: Measurement
• WIPO sector: Instruments

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.