Analysis of a fork-shaped rectangular coil oriented perpendicular to moving conductor slabs

Vertical-type coils arranged perpendicular to conductor slabs have proven useful for nondestructive testing. Because the fork–coil method offers the advantage that the lift-off effect is fundamentally removed, we analyze a fork-shaped rectangular coil oriented perpendicular to conductor slabs. Our calculations elucidate some characteristics of the conductor and the coil arrangement as a function of system parameters such as the slab dimensions, speed, and direction of motion. We validate the results of the calculation by comparing them with experimental results.