一种基于磁导效应的钢管在线多频漏磁检测方法

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

作者信息

Wu Jianbo, Fang Hui, Huang Xiaoming, Xia Hui, Kang Yihua, Tang Chaoqing

机构信息

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.

出版信息

Sensors (Basel). 2017 Dec 15;17(12):2911. doi: 10.3390/s17122911.

DOI:10.3390/s17122911

PMID:29244723

原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC5751625/

Abstract

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.

摘要

为了提高钢管在线漏磁检测的灵敏度，本文提出并研究了一种基于磁导效应的传感方法。与使用非铁磁支撑的传统接触传感方法相比，该方法创造性地利用铁磁支撑来引导更多的磁通泄漏。基于霍普金森定律，从理论上阐述了铁磁支撑的磁导效应原理。然后，进行数值模拟以研究铁磁支撑对漏磁变化的影响。最后，设计并开发了基于该方法的探头，并进行了在线漏磁实验以验证该方法的可行性。在线测试表明，所提出的传感方法能够大大提高漏磁检测的灵敏度。