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Non-destructive testing (NDT) has preoccupied a growing number of scientists in recent years. In the field of NDT, the eddy current testing is widely used in industry occasions. It is important to optimize the parameters of the planar eddy current coil to improve the sensitivity of non-destructive testing. In this paper, a planar eddy current excitation coil with the multi-frequency signal on a printed...
In recent years, the demand for coins in society has increased rapidly and at the same time, a large amount of forged coin has also appeared. The previous approaches for coin identification using image, weight, and diameter are not able to consider both efficiency and accuracy. The eddy current identification system with simple frequency cannot pick up the whole character of coins. In this research,...
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