The increasing need of both reliability and speed during inspection operations requires to develop new inspection devices, such as EC multisensor arrays. In this paper, the authors consider the detection of small surface breaking defects ranging from 0.1×0.1×0.1 mm3to 0.8×0.1×0.4 mm3. A low-cost multilayer PCB multicoil array was implemented using different transmit/receive strategies and the detection performances were exhaustively quantified and compared, thanks to the computation of Receiver Operating Characteristics. Two strategies allow the smallest defects to be detected without false alarm.
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