TY - GEN
T1 - Defect detection in aluminium with an eddy currents sensor
AU - Ramírez-Pacheco, E.
AU - Espina-Hernández, J. H.
AU - Caleyo, F.
AU - Hallen, J. M.
PY - 2010
Y1 - 2010
N2 - The purpose of this paper is to present an eddy current testing technique for surface defect detection in conducting materials using a giant magneto resistive (GMR) sensor. A flat coil is used to produce an alternate magnetic field, which gives rise to eddy currents in the material under test. The GMR sensor with the coil placed on top of it is mounted in a holder, which is moved over the surface of the metal plate using an XY table. Three aluminium plates were used with defects having nominals depths of 2, 4, 6, and 8 mm and widths of 0.6, 1 and 1.4 mm, respectively. The defects were scanned with the sensing axis perpendicular to the defect length. The GMR output voltage depends on the width and depth of the defects. Two parameters extracted from the GMR output voltage signal are obtained and a simple correlation between the defects dimensions and the GMR output voltage is proposed.
AB - The purpose of this paper is to present an eddy current testing technique for surface defect detection in conducting materials using a giant magneto resistive (GMR) sensor. A flat coil is used to produce an alternate magnetic field, which gives rise to eddy currents in the material under test. The GMR sensor with the coil placed on top of it is mounted in a holder, which is moved over the surface of the metal plate using an XY table. Three aluminium plates were used with defects having nominals depths of 2, 4, 6, and 8 mm and widths of 0.6, 1 and 1.4 mm, respectively. The defects were scanned with the sensing axis perpendicular to the defect length. The GMR output voltage depends on the width and depth of the defects. Two parameters extracted from the GMR output voltage signal are obtained and a simple correlation between the defects dimensions and the GMR output voltage is proposed.
KW - Defect detection
KW - Defect dimensions
KW - Eddy currents
KW - Giant magnetoresistive sensor
KW - Nondestructive evaluation
UR - http://www.scopus.com/inward/record.url?scp=79951669159&partnerID=8YFLogxK
U2 - 10.1109/CERMA.2010.91
DO - 10.1109/CERMA.2010.91
M3 - Contribución a la conferencia
AN - SCOPUS:79951669159
SN - 9780769542041
T3 - Proceedings - 2010 IEEE Electronics, Robotics and Automotive Mechanics Conference, CERMA 2010
SP - 765
EP - 770
BT - Proceedings - 2010 IEEE Electronics, Robotics and Automotive Mechanics Conference, CERMA 2010
T2 - 2010 7th IEEE Electronics, Robotics and Automotive Mechanics Conference, CERMA 2010
Y2 - 28 September 2010 through 1 October 2010
ER -