Eddy currents (EC) are commonly used for the inspection of metallic components in the aeronautic field. The increasing demand in terms of defect detection, material characterisation and the reduction of development costs, leads the manufacturers to develop more and more efficient methods. Conventional eddy current methods do not allow cracks and corrosion detection for parts of high thickness (> to 4mm). Therefore, pulsed Eddy currents have obviously an interesting potential to push forward this limit. Modelling is more and more developed and used in order to have a better understanding of the physical phenomena, to ensure the quality of eddy current measurements, to reduce costs of experimental tests, as well as to optimise the inspection parameters (probes, frequency and type of excitation signal ...). In particular finite element modelling is a powerful assistant tool for development and optimisation of inspection techniques like pulsed eddy currents. The main points of this work were the evaluation of different pulsed excitation signals on defect, the development of dedicated signal processing method, in order to evaluate the performances of pulsed eddy current in terms of defect detection, location and sizing.
Pulsed eddy current non destructive testing
Zerstörungsfreie Prüfung mit Impulswirbelstrom
2002
7 Seiten, 7 Bilder, 9 Quellen
Conference paper
Storage medium
English
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