Calculations of the Flaw Signal Generated by a Differential Eddy-Current Probe

  • S. A. Jenkins
  • J. R. Bowler
Part of the Review of Progress in Quantitative Nondestructive Evaluation book series


Differential eddy-current probes are attractive because of their insensitivity to lift-off effects. By using two similar coils wound in opposition we have a sensor that detects variations in the magnetic field along a line joining their centers. The impedance plane response of a differential probe to a flaw is rather more complicated than the signal from a single winding probe, but this is a price one must be prepared to pay for nullifying the lift-off signal.


Conjugate Gradient Algorithm Differential Voltage Pulse Function Excitation Coil Dipole Density 
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Copyright information

© Springer Science+Business Media New York 1990

Authors and Affiliations

  • S. A. Jenkins
    • 1
  • J. R. Bowler
    • 1
  1. 1.University of SurreyGuildford SurreyEngland

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