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Modelling of a Differential Sensor in Eddy Current Non-Destructive Evaluation

Anders Rosell (Institutionen för material- och tillverkningsteknik, Avancerad oförstörande provning) ; Gert Persson (Institutionen för material- och tillverkningsteknik, Avancerad oförstörande provning)
COMSOL Conference 2011, Stuttgart, http://www.comsol.se/papers/10960/ (2011)
[Konferensbidrag, övrigt]

Interaction between the probe and a defect in eddy current (EC) non-destructive evaluation (NDE) is studied. In this work a differential sensor is considered and the problem regarded here is problem 8 from the testing of electromagnetic analysis methods (TEAM) workshops. The truncation, referring to the position of the outer boundaries of the finite element model, is evaluated in three dimensions (3D) by the use of an analysis in axial symmetry. The results show that it is reliable to use a model size where the positions of the outer boundaries are put where the magnetic vector potential has dropped to 1 % of its maximum value. The axisymmetric model in is compared to an analytical model with good results.

Nyckelord: Eddy current, Non-destructive evaluation, Differential sensor, Calculation of impedance



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Denna post skapades 2012-01-04. Senast ändrad 2012-01-09.
CPL Pubid: 151643

 

Institutioner (Chalmers)

Institutionen för material- och tillverkningsteknik, Avancerad oförstörande provning (2005-2017)

Ämnesområden

Materialvetenskap
Materialteknik

Chalmers infrastruktur

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