MULTI-SENSOR APPROACH FOR PULSED EDDY CURRENT TESTING: DESIGN, SIMULATION, AND NON-DESTRUCTIVE TESTING POTENTIAL

Abstract

Pulsed Eddy Current (PEC) testing is a non-destructive testing (NDT) technique that has been widely used in various applications, including the detection
and characterization of defects in metallic materials. The measurement of pulsed eddy current signals is essential for this purpose. This study proposes a novel
multi-sensor PEC approach for improved defect detection. The proposed approach uses multiple magnetic sensors placed at different locations to measure the
magnetic field changes induced by defects on the surface of a metallic specimen. This approach has the advantage of being able to measure at multiple points
simultaneously, which can improve the accuracy and reliability of the measurement results. We conducted a simulation of the magnetic field distribution and
proposed a structure for a multi-sensor system placed under the excitation coil in a probe. The multi-sensor system will collect electromagnetic signals generated
by eddy currents to help identify defects more accurately. The team also investigated and evaluated the effects of several factors on the sensor signal, such as
the frequency, amplitude, and pulse width of the excitation source. This study provides a new approach for improving defect detection performance in PEC
testing. The proposed approach has the potential to be applied to a wide range of NDT applications.