Performance comparison experiment of eddy current Bobbin probe

In order to evaluate the performance of the self-made bobbin probe, a series of sample tubes were designed and processed by comparing with the imported probe. The probe impedance, center frequency, effective scanning area width, filling coefficient, depth coefficient, axial length coefficient, circumferential width coefficient, phase depth curve, permanent magnet saturation strength, signal symmetry and other performance indicators were tested. The comparison results show that the performance of the self-made probe is equivalent to that of the imported one.