Widyaningrum Indrasari, Dila Sabila, Heri Firmansyah
The Eddy Current Testing (ECT) method is a non-destructive testing technique based on electromagnetic induction that can be used to test conductive objects. This research designs a detection system for conductive plates using a concentric probe coil sensor consisting of one transmitter coil with 350 turns and two receiver coils with 250 turns each. As a signal generation circuit, the DDS AD9850 is used, and the signal conditioning circuit uses the AD620, LTC1966, and the ADC ADS1115. The coil probe testing was conducted by comparing the coil probe response using two different signal sources, namely an audio generator and the DDS AD9850, at excitation frequency variations of 10-50 kHz. Meanwhile, system testing was performed on five types of conductive metal plates: copper, aluminum, brass, stainless steel, and iron, each with a thickness of 1 mm. The results showed that the system was able to differentiate materials based on the output voltage, which is directly proportional to their electrical conductivity. This research successfully designed an ECT prototype for non-destructive identification of conductive metal plate types, but it is still limited to one size of metal plate. © Published under licence by IOP Publishing Ltd.
Department of Physics, Universitas Negeri Jakarta, Jakarta, 13220, Indonesia; Department of Automation Engineering Technology, Universitas Negeri Jakarta, Jakarta, 13220, Indonesia
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