Magnetic NDE Using a Double Rectangular Coil and a Hall Effect Sensor: A Simple Analysis

In this paper a simple analysis and measurement device in eddy current NDE are presented. A Hall probe is associated to a double rectangular Printed Circuit Board PCB. The configurations examined involve the double coil in air and above aluminum plates, either with or without cracks of various depths. The agreement between experimental and theoretical results is very good, showing that our model accurately describes the electromagnetic fields.