MSU Technologies

EDDY CURRENT SENSOR ARRAY

VAlue proposition

Eddy current testing (ECT) is a widely employed nondestructive testing (NDT) technique that utilizes electromagnetic induction to detect surface and subsurface defects in conductive materials. Due to its rapid, contactless nature and high sensitivity to material property variations, ECT has found extensive applications where ensuring structural integrity and early-stage defect detection are critical. However, traditional ECT methods often face challenges in improving detection sensitivity, enhancing defect characterization, and achieving reliable inspection of defects with arbitrary orientations.

Description of Technology

This technology uses an omnidirectional eddy current technique based on the phase-amplitude controlled eddy current array. By independently controlling the amplitude and phase of multiple excitation sources, this method enables precise manipulation of eddy current distribution, allowing for directional control of the induced eddy currents. This approach enhances the sensitivity of defect detection by optimizing the interaction between the eddy currents and material discontinuities. Unlike conventional ECT systems, which rely on limited excitation schemes, the proposed method dynamically adjusts the eddy current vector field, enabling improved defect detection regardless of defect orientation. By regulating the magnitude size of the excitation current and the phase, the magnitude and angle of the eddy current at the point can be changed, thus realizing the high sensitivity detection of defects at different angles.

Benefits