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Improvement of the Frequency Behavior of an EC-NDT Inspection System

  • Andrea BernieriEmail author
  • Giovanni Betta
  • Luigi Ferrigno
  • Marco Laracca
  • Antonio Rasile
Conference paper
Part of the Lecture Notes in Electrical Engineering book series (LNEE, volume 539)

Abstract

The non-destructive testing based on eddy currents (EC-NDT) is an in-field inspection technique mainly used to detect and characterize defects in conductive materials. This technique is adopted in many industrial, manufacturing and aerospace applications. Today, in aeronautical and industrial applications, new thin carbon fiber materials often substitute metallic materials as aluminum, copper and so on. Therefore, the actual trend of EC-NDT is the in-field inspection of these very thin materials. Considering the skin depth of induced eddy current, the thinness of these materials imposes the use of higher frequencies than those typically adopted in traditional tests. Due to the inductive load of the excitation coil, the voltage required to obtain the desired current values could reach very high values. The use of resonant excitation circuits could mitigate this problem. The article describes the effect of some real resonant circuits on the improvement of feeding high-frequency EC-NDT probes in terms of required voltage and power.

Keywords

Eddy current test Non destructive test Resonance High frequency 

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Copyright information

© Springer Nature Switzerland AG 2019

Authors and Affiliations

  • Andrea Bernieri
    • 1
    Email author
  • Giovanni Betta
    • 1
  • Luigi Ferrigno
    • 1
  • Marco Laracca
    • 1
  • Antonio Rasile
    • 1
  1. 1.Department of Electrical and Information EngineeringUniversity of Cassino and Southern LazioCassinoItaly

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