Three-axis magnetic flux leakage in-line inspection simulation based on finite-element analysis

doi:10.1088/1674-1056/22/1/018103

Abstract With the increasing of pipelines, the corrosion leakage accidents happen frequently. Therefore, nondestructive testing technology is important for ensuring the safe operation of the pipelines and energy mining. In this paper, the structure and principle of magnetic flux leakage (MFL) in-line inspection system is introduced firstly. Besides, a mathematic model of the system according to ampere circuit rule, flux continuity theorem, and column coordinate transform is built. And the magnetic flux density in every point of space is calculated based on the theory of finite element analysis. Then we analyze and designe the disposition of measurement section probes and sensors combining both three-axis MFL in-line inspection and multi-sensor fusion technology. Its advantage is that the three-axis changes of magnetic flux leakage field are measured by the multi-probes at the same time. So we can determine various defects accurately. Finally, the theory of finite element analysis is used to build a finite element simulation model, and the relationship between defects and MFL inspection signals is studied. Simulation and experiment results verify that the method not only enhance the detection ability to different types of defects but also improve the precision and reliability of the inspection system.

Keywords: magnetic flux leakage in-line inspection multi-sensor data fusion sensor disposition finite element analysis

Received: 25 May 2012
Revised: 19 July 2012
Accepted manuscript online:

PACS:

81.70.Ex

(Nondestructive testing: electromagnetic testing, eddy-current testing)

Fund: Project supported by the National Natural Science Foundation of China (Grant Nos. 61273164 and 61034005), the National High Technology Research and Development Program of China (Grant No. 2012AA040104), and the Fundamental Research Funds for the Central Universities, China (Grant No. N100104102).

Corresponding Authors: Feng Jian
E-mail: fjneu@163.com

Cite this article:

Feng Jian (冯健), Zhang Jun-Feng (张峻峰), Lu Sen-Xiang (卢森骧), Wang Hong-Yang (王宏阳), Ma Rui-Ze (马瑞泽) Three-axis magnetic flux leakage in-line inspection simulation based on finite-element analysis 2013 Chin. Phys. B 22 018103

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Three-axis magnetic flux leakage in-line inspection simulation based on finite-element analysis

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