The paper introduces a novel 4-coils probe designed for Eddy Current Non-Destructive Testing on conductive materials. The key innovation lies in its capability to identify small surface and subsurface cracks regardless of their orientation. This is achieved through a suitable probe developed using two pairs of exciting coils that allow to generate two orthogonal magnetic fields. Using two excitation currents with an amplitude modulation approach, a rotation of the eddy currents induced in the conductive sample is obtained. This novel approach ensures effective detection of deep and arbitrarily oriented cracks. Both numerical tests and experimental evaluations were employed to assess the performance of the proposed probe. The probe’s effectiveness was particularly observed in detecting a buried crack measuring 5 mm in length, 1 mm in height, and 0.1 mm in thickness at depths up to 3 mm in an aluminum plate. The results demonstrated the robustness of the probe’s detection capability, affirming its potential as a reliable tool for nondestructive testing in industrial applications.

An Eddy Current Probe for the Detection of Subsuperficial Defects of Any Orientation / Carere, Federico; Sardellitti, Alessandro; Bernieri, Andrea; Ferrigno, Luigi; Sangiovanni, Silvia; Laracca, Marco. - In: IEEE TRANSACTIONS ON INSTRUMENTATION AND MEASUREMENT. - ISSN 0018-9456. - 73:(2024), pp. 1-13. [10.1109/tim.2024.3395324]

An Eddy Current Probe for the Detection of Subsuperficial Defects of Any Orientation

Carere, Federico;Sardellitti, Alessandro;Sangiovanni, Silvia;Laracca, Marco
2024

Abstract

The paper introduces a novel 4-coils probe designed for Eddy Current Non-Destructive Testing on conductive materials. The key innovation lies in its capability to identify small surface and subsurface cracks regardless of their orientation. This is achieved through a suitable probe developed using two pairs of exciting coils that allow to generate two orthogonal magnetic fields. Using two excitation currents with an amplitude modulation approach, a rotation of the eddy currents induced in the conductive sample is obtained. This novel approach ensures effective detection of deep and arbitrarily oriented cracks. Both numerical tests and experimental evaluations were employed to assess the performance of the proposed probe. The probe’s effectiveness was particularly observed in detecting a buried crack measuring 5 mm in length, 1 mm in height, and 0.1 mm in thickness at depths up to 3 mm in an aluminum plate. The results demonstrated the robustness of the probe’s detection capability, affirming its potential as a reliable tool for nondestructive testing in industrial applications.
2024
Any orientation defects; buried cracks; Coils; Defect characterization; Defect detection; Eddy Current Testing; Eddy currents; Finite element method; Magnetic fields; Magnetic flux; Magnetic sensors; Probes; Rotating Eddy Current; Rotating magnetic field; Sensitivity
01 Pubblicazione su rivista::01a Articolo in rivista
An Eddy Current Probe for the Detection of Subsuperficial Defects of Any Orientation / Carere, Federico; Sardellitti, Alessandro; Bernieri, Andrea; Ferrigno, Luigi; Sangiovanni, Silvia; Laracca, Marco. - In: IEEE TRANSACTIONS ON INSTRUMENTATION AND MEASUREMENT. - ISSN 0018-9456. - 73:(2024), pp. 1-13. [10.1109/tim.2024.3395324]
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11573/1710008
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