Defect evaluation using the phase information of an EC-GMR sensor

Author

Peng Gao ; Chao Wang ; Yang Li ; Fanwei Li ; Yong Yan ; Yonghui Hu

Author_Institution

Sch. of Electr. Eng. & Autom., Tianjin Univ., Tianjin, China

fYear

2014

fDate

12-15 May 2014

Firstpage

25

Lastpage

29

Abstract

Phase information is employed to enhance evaluating defects in the metals by eddy current testing using the conventional probes. But for an EC-GMR sensor, the output phase is not used. In this paper, GMR-based eddy current defect detection is studied, in which the phase of the GMR sensor output is taken into account. Based on Biot-Savart law, amplitude and phase for the EC-GMR sensor´s output are studied. This paper shows that defect can be better located through the phase analysis of the GMR sensor´s output.

Keywords

eddy current testing; electric sensing devices; giant magnetoresistance; magnetic sensors; magnetoresistive devices; Biot-Savart law; EC-GMR Sensor; eddy current defect detection; eddy current testing; phase information analysis; probe; Coils; Eddy currents; Equations; Magnetic fields; Mathematical model; Probes; Sensors; Angle information; Defect detection; Eddy current testing (ECT); Giant magnetoresistance (GMR);

fLanguage

English

Publisher

ieee

Conference_Titel

Instrumentation and Measurement Technology Conference (I2MTC) Proceedings, 2014 IEEE International

Conference_Location

Montevideo

Type

conf

DOI

10.1109/I2MTC.2014.6860516

Filename

6860516