Effects of a remanent magnetization on the sensing signals in magnetic flux leakage type NDT

Author

Seo, Kang ; Han, Jae Man ; Park, Gwan Soo

Author_Institution

Pusan Nation Univ., Pusan

fYear

2007

fDate

8-11 Oct. 2007

Firstpage

1932

Lastpage

1935

Abstract

Sensitive detection of the defect signals in NDT system is critical. Because of a strong magnetic field in magnetic flux type NDT system, the object itself is magnetized and shows a hysteresis characteristics during the sensing, which might cause a distortion of the defect signals. In this research, the magnetization characteristics of a pipeline in the magnetic flux leakage type non-destructive testing are analyzed. Effects of a magnetic hysteresis of a pipeline are analyzed by Preisach modeling and a magnetic flux density due to a remanent magnetization of gas pipeline is computed and verified by real measurement.

Keywords

magnetic fields; magnetic flux; magnetic hysteresis; magnetic leakage; nondestructive testing; pipelines; remanence; gas pipeline; hysteresis; magnetic field; magnetic flux density; magnetic flux leakage; nondestructive testing system; remanent magnetization; sensing signals; Distortion; Magnetic analysis; Magnetic fields; Magnetic flux; Magnetic flux density; Magnetic flux leakage; Magnetic hysteresis; Magnetization; Nondestructive testing; Pipelines; magnetic flux leakage; magnetic sensor; non destructive testing; nonlinear finite element analysis;

fLanguage

English

Publisher

ieee

Conference_Titel

Electrical Machines and Systems, 2007. ICEMS. International Conference on

Conference_Location

Seoul

Print_ISBN

978-89-86510-07-2

Electronic_ISBN

978-89-86510-07-2

Type

conf

Filename

4412128