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Using Giant Magneto-Resistance Sensors in Remote Field Eddy Current Tube Inspection

Ribeiro, A. L. ; Ramos, H. ; Pasadas, D. ; Rocha, T.

Using Giant Magneto-Resistance Sensors in Remote Field Eddy Current Tube Inspection, Proc IMEKO TC10 Workshop on Technical Diagnostics, Florence, Italy, Vol. 0, pp. 0 - 0, June, 2013.

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Abstract
This paper presents a remote field eddy current probe that includes a giant magneto-resistance
(GMR) as magnetic sensor in order to detect longitudinal and circumferential defects in stainless steel tubes. The
high sensibility of the GMR sensor in a large frequency range (0 Hz – 1 MHz) allows us to consider that it can
be a good candidate to analyze several defects in tubing by a remote field testing method. Experimental data
were acquired by a measurement system to verify the sensibility of the GMR in defect detection and to create a
new probe. In this work, simulations were also made in order to verify the veracity of the obtained experimental
results.