Patent ID: 8988071
Filing Date: 2015-03-24
Classification: G01N

Abstract:
1. A nondestructive inspection method using eddy currents for detecting flaws in a metal structure by an array of coils attached to a surface of said structure, comprising: activating the coils; measuring electrical signals of the coils representative of the eddy currents; comparing the electrical signal of each of the coils with a specific electrical signal emanating from at least one coil installed at an edge of the surface; and evaluating over time the comparing of the electrical signal of each of the coils, to detect a variation in the electrical signal of each of the coils with respect to a reference that is an edge effect corresponding to the specific electrical signal emanating from at least one coil installed at the edge of the surface, a level of said variation being indicative of a presence of one or more of the flaws in the structure.