Eddy currents (also called Foucault currents[1]) are loops of electrical current induced within conductors by a changing magnetic field in the conductor, due to Faraday’s law of induction. Eddy currents flow in closed loops within conductors, in planes perpendicular to the magnetic field. They can be induced within nearby stationary conductors by a time-varying magnetic field created by anAC el...

A commercial finite-element engineering-analysis code was used to model pulsed-induction (time-domain) sensing of UXO for comparison with measurements made with the Geonics EM61-3D. Late-time decay constants are observed to be independent of shape and orientation in solid nonpermeable (aluminum) objects with the same volume, in agreement with theory, except for flattened objects on end with res...

Non-destructive Eddy current (EC) technique has long been used to detect discontinuities in materials. Recently, its application has been extended to characterize materials microstructure. In order to identify different microstructures, four plain carbon steel bars with different chemical compositions (AISI 1015, 1035, 1045 and 1080) were used in annealed condition. The pearlite percentage, car...

As excitation factors of heating time and power directly affect the behaviour of eddy current and thermal propagation for eddy current pulsed thermography (ECPT), it is necessary to investigate the optimal parameters to maximize contrast between the defective and non-defective area as well as quantitative evaluation. The defect evaluation on complex geometry in the structural especially edges r...

We investigated the effects of pulsed magnetic stimulation on tumor development processes and immune functions in mice. A circular coil (inner diameter = 15 mm, outer diameter = 75 mm) was used in the experiments. Stimulus conditions were pulse width = 238 micros, peak magnetic field = 0.25 T (at the center of the coil), frequency = 25 pulses/s, 1,000 pulses/sample/day and magnetically induced ...