A Study on Non-Destructive Techniques base on Eddy Current probe
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Abstract
This research is to present the principle of investigating the discontinuity of electric current flowing on conductors due to cracks in invisible conductors. An eddy current is a circular eddy current induced in a conductor by an alternating magnetic field. This method is a non-destructive test based on the principle of electricity are generated by the magnetic field acts on a metal surface. The eddy current produces a magnetic field in the opposite direction of the magnetic field that acts. In this way, a structured probe of an induction coil was designed to excite a magnetic field and a sensing coil. When an eddy current passes through a crack on the surface of the metal plate, it induces an inductance with an inductance coil assembled into the Maxwell Bridge circuit to detect an AC signal change that affects the electromagnetic value of Impedance of the inductance coil. Besides, the AC signal is detected employing a magnetic field with a probe coil The probe sensor designed to measure a parallel on the surface of the perforated metal sheet.
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References
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