ePrints

Determination of Optimal Frequency in Magnetic Eddy Current Testing for Discrimination of Inner Defect or Outer Defect

Lookup NU author(s): Dr Dae Yong Um

Downloads

Full text for this publication is not currently held within this repository. Alternative links are provided below where available.

Abstract

© 2024 Korean Institute of Electrical Engineers. All rights reserved.This paper is a study on the determination of optimal frequency in Magnetic Eddy Current Testing (MEC) for characterizing defects in ferromagnetic steel pipe inspection. Conventional methods have their own limitations so that cannot distinguish between inner defects and outer defects. MEC can overcome the limitations of conventional methods. It can not only detect both inner defect and outer defects, but also distinguish between them. It is important to determine frequency to distinguish two defects in MEC. In this paper, the principle of distinguishing two defects has been explained and appropriate frequency was proposed. By using frequency that makes the phase of signal varies for each defect, two defects can be distinguished. Finite element simulation and experiment were performed. The result shows that the frequency increases, the phase difference between two defects also increases so that it can distinguish two defects through the phase difference of the signals.

Publication metadata

Author(s): Chae SA, Song MS, Um DY, Park GS

Publication type: Article

Publication status: Published

Journal: Transactions of the Korean Institute of Electrical Engineers

Year: 2024

Volume: 73

Issue: 3

Pages: 531-537

Online publication date: 01/03/2024

Acceptance date: 06/02/2024

ISSN (print): 1975-8359

ISSN (electronic): 2287-4364

Publisher: Korean Institute of Electrical Engineers

URL: https://doi.org/10.5370/KIEE.2024.73.3.531

DOI: 10.5370/KIEE.2024.73.3.531

Altmetrics

Share