Scanning by multi-sensors to detect surface and internal defects

this research paper aims to detect of hidden defects on a metallic plate by collecting data by placing several eddy current sensors side by side. With alternating feeding in order to avoid mutual induction between different sensors. This technique saves a great deal of time when evaluating conductive elements with a small number of tests that allow us to obtain a signal from which we know the presence of an internal defect, and thus pave the way for us to determine their shape and dimensions in other works.