Process of and apparatus for non-destructive eddy current testing involves the suppression of displayed lobes corresponding to fault parameters to be eliminated from the display

摘要

A process of and apparatus for non-destructive eddy current testing involves the suppression of displayed lobes corresponding to fault parameters to be eliminated from the display. Elimination circuits are provided for operating on the measurement signal to remove the undesirable parameters from the signal by compensation of the effects produced by the parameters at different frequencies.