Patent attributes
An eddy current detection system configured in accordance with an example embodiment of the invention employs a high frequency rotary eddy current probe that is capable of detecting very shallow surface imperfections, including imperfections originating at scribe lines located near lap joints on an aircraft fuselage. The rotary eddy current probe includes a differential sensing coil arrangement surrounded by a reflection coil, both of which are located within the probe tip housing of the rotary eddy current probe. The differential sensing coil arrangement and the reflection coil are positioned off-axis within the rotary eddy current probe. In addition, the rotary eddy current probe employs a partial electromagnetic shield that does not completely surround the differential sensing coil arrangement.
