Some particularities of EC crack detection in aluminum using an asymmetrical GMR-coil configuration

E. Ramírez; J. H. Espina; J. A. Pérez; F. Caleyo; J. M. Hallen

doi:10.1109/TLA.2015.7111986

Some particularities of EC crack detection in aluminum using an asymmetrical GMR-coil configuration

E. Ramírez, J. H. Espina, J. A. Pérez, F. Caleyo, J. M. Hallen

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2 Scopus citations

Abstract

This paper presents experimental results related to an asymmetrical coil ? GMR configuration for the detection of surface cracks using eddy currents. The system is evaluated for three different excitation frequencies and the relationship between the extracted parameter (DV) from the GMR output voltage and the crack's dimension is validated. The analysis of the presence of the intermediate peak in the output voltage of the GMR sensor is performed. The stability of the excitation current source is presented and it is demonstrated that the presence of the intermediate peak does not have a significant influence on the relationship of DV with the depth of the crack. The intermediate peak could help on deciding if the crack depth is smaller than 2 mm or if the width is thinner than 0.6 mm. It is studied the behavior of the intermediate peak and its relationship with the width of the defects and with the penetration depth of the eddy currents.

Original language	English
Article number	7111986
Pages (from-to)	1331-1339
Number of pages	9
Journal	IEEE Latin America Transactions
Volume	13
Issue number	5
DOIs	https://doi.org/10.1109/TLA.2015.7111986
State	Published - 1 May 2015

Keywords

coil
crack aluminum
eddy currents
giant magnetoresistance (GMR)

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10.1109/TLA.2015.7111986

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title = "Some particularities of EC crack detection in aluminum using an asymmetrical GMR-coil configuration",

abstract = "This paper presents experimental results related to an asymmetrical coil ? GMR configuration for the detection of surface cracks using eddy currents. The system is evaluated for three different excitation frequencies and the relationship between the extracted parameter (DV) from the GMR output voltage and the crack's dimension is validated. The analysis of the presence of the intermediate peak in the output voltage of the GMR sensor is performed. The stability of the excitation current source is presented and it is demonstrated that the presence of the intermediate peak does not have a significant influence on the relationship of DV with the depth of the crack. The intermediate peak could help on deciding if the crack depth is smaller than 2 mm or if the width is thinner than 0.6 mm. It is studied the behavior of the intermediate peak and its relationship with the width of the defects and with the penetration depth of the eddy currents.",

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AU - Ramírez, E.

AU - Espina, J. H.

AU - Pérez, J. A.

AU - Caleyo, F.

AU - Hallen, J. M.

PY - 2015/5/1

Y1 - 2015/5/1

N2 - This paper presents experimental results related to an asymmetrical coil ? GMR configuration for the detection of surface cracks using eddy currents. The system is evaluated for three different excitation frequencies and the relationship between the extracted parameter (DV) from the GMR output voltage and the crack's dimension is validated. The analysis of the presence of the intermediate peak in the output voltage of the GMR sensor is performed. The stability of the excitation current source is presented and it is demonstrated that the presence of the intermediate peak does not have a significant influence on the relationship of DV with the depth of the crack. The intermediate peak could help on deciding if the crack depth is smaller than 2 mm or if the width is thinner than 0.6 mm. It is studied the behavior of the intermediate peak and its relationship with the width of the defects and with the penetration depth of the eddy currents.

AB - This paper presents experimental results related to an asymmetrical coil ? GMR configuration for the detection of surface cracks using eddy currents. The system is evaluated for three different excitation frequencies and the relationship between the extracted parameter (DV) from the GMR output voltage and the crack's dimension is validated. The analysis of the presence of the intermediate peak in the output voltage of the GMR sensor is performed. The stability of the excitation current source is presented and it is demonstrated that the presence of the intermediate peak does not have a significant influence on the relationship of DV with the depth of the crack. The intermediate peak could help on deciding if the crack depth is smaller than 2 mm or if the width is thinner than 0.6 mm. It is studied the behavior of the intermediate peak and its relationship with the width of the defects and with the penetration depth of the eddy currents.

KW - coil

KW - crack aluminum

KW - eddy currents

KW - giant magnetoresistance (GMR)

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Some particularities of EC crack detection in aluminum using an asymmetrical GMR-coil configuration

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Keywords

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