Defect Image Recognition and Classification for Eddy Current Testing of Titanium Plate Based on Convolutional Neural Network

Table 1

TR probe parameters.

Sensor parameters	Value
Inner radius rexi/rrei	0.75 mm/0.75 mm
Out radius rexo/rreo	1.25 mm/1.5 mm
(spacing between two coils)	3.5 mm
l 2 − l1 (height of coil)	3 mm
Permeability of ferrite core	2300
Number of turns Nex/Nre	160/200
Ferrite core diameter	1.5 mm