Eddy Current Signal Analysis for Transmit-Receive Pancake Coil on ECT Array Prbe

초록

this paper, the eddy current signals come from a pair of transmit-receive (T/R) pancake coil on ECT array probe are analyzed with the variations of the lift-off and of the distance between transmit and receive coils. To obtain the electromagnetic characteristics of the probes, the governing equation describing the eddy current problems is derived from Maxwell's equation and is solved using three-dimensional finite element method. Eddy current signals from T/R coils on ECT array probe have quite different characteristics compared with ones from impedance coil on rotating pancake coil probe. The results in this paper can be helpful when the field eddy current signals from ECT array probe are evaluated.

키워드