An Online MFL Sensing Method for Steel Pipe Based on the Magnetic Guiding Effect

Sensors

Chaoqing Tang¹  Hui Xia²  Xiaoming Huang²  Jianbo Wu²  Hui Fang²  Yihua Kang³ 

[1] School of Electrical and Electronic Engineering, Newcastle University, Newcastle upon Tyne NE1 7RU, UK;School of Manufacturing Science and Engineering, Sichuan University, Chengdu 610065, China;School of Mechanical Science and Engineering, Huazhong University of Science and Technology, Wuhan 430074, China;

关键词: steel pipe;    online MFL (magnetic flux leakage) testing;    non-ferromagnetic and ferromagnetic supports;    magnetic guiding effect;   

DOI  :  10.3390/s17122911

来源: DOAJ

【 摘 要 】

In order to improve the sensitivity of online magnetic flux leakage (MFL) testing for steel pipe, a sensing method based on the magnetic guiding effect is proposed and investigated in this paper. Compared to the conventional contact sensing method using a non-ferromagnetic support, the proposed method creatively utilizes a ferromagnetic one to guide more magnetic flux to leak out. Based on Hopkinson’s law, the principle of the magnetic guiding effect of the ferromagnetic support is theoretically illustrated. Then, numerical simulations are conducted to investigate the MFL changes influenced by the ferromagnetic support. Finally, the probe based on the proposed method is designed and developed, and online MFL experiments are performed to validate the feasibility of the proposed method. Online tests show that the proposed sensing method can greatly improve the MFL sensitivity.

【 授权许可】

Unknown