Next Article in Journal
Power Control Technique Using Error Distribution Analysis for Ultrasound Imaging Displays
Previous Article in Journal
A PLL-Based Online Estimation of Induction Motor Consumption Without Electrical Measurement
Article Menu

Export Article

Open AccessFeature PaperReview

Review of Pulsed-Eddy-Current Signal Feature-Extraction Methods for Conductive Ferromagnetic Material-Thickness Quantification

1
Department of Electrical and Electronic Engineering, The University of Melbourne, Parkville, VIC 3010, Australia
2
Centre for Autonomous Systems, University of Technology Sydney, Ultimo, NSW 2007, Australia
*
Author to whom correspondence should be addressed.
Electronics 2019, 8(5), 470; https://doi.org/10.3390/electronics8050470
Received: 12 March 2019 / Revised: 16 April 2019 / Accepted: 17 April 2019 / Published: 26 April 2019
(This article belongs to the Section Circuit and Signal Processing)
  |  
PDF [912 KB, uploaded 28 April 2019]
  |  

Abstract

Thickness quantification of conductive ferromagnetic materials has become a common necessity in present-day structural health monitoring and infrastructure maintenance. Recent research has found Pulsed Eddy Current (PEC) sensing, especially the detector-coil-based PEC sensor architecture, to effectively serve as a nondestructive sensing technique for this purpose. As a result, several methods of varying complexity have been proposed in recent years to extract PEC signal features, against which conductive ferromagnetic material thickness behaves as a function, in return enabling thickness quantification owing to functional behaviours. It can be seen that almost all features specifically proposed in the literature for the purpose of conductive ferromagnetic material-thickness quantification are in some way related to the diffusion time constant of eddy currents. This paper examines the relevant feature-extraction methods through a controlled experiment in which the methods are applied to a single set of experimentally captured PEC signals, and provides a review by discussing the quality of the extractable features, and their functional behaviours for thickness quantification, along with computational time taken for feature extraction. Along with this paper, the set of PEC signals and some MATLAB codes for feature extraction are provided as supplementary materials for interested readers. View Full-Text
Keywords: eddy current; feature extraction; ferromagnetic; function; NDE; NDT; optimisation; pulsed eddy current; review; signal processing; thickness quantification eddy current; feature extraction; ferromagnetic; function; NDE; NDT; optimisation; pulsed eddy current; review; signal processing; thickness quantification
Figures

Figure 1

This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited (CC BY 4.0).

Supplementary material

SciFeed

Share & Cite This Article

MDPI and ACS Style

Ulapane, N.; Nguyen, L. Review of Pulsed-Eddy-Current Signal Feature-Extraction Methods for Conductive Ferromagnetic Material-Thickness Quantification. Electronics 2019, 8, 470.

Show more citation formats Show less citations formats

Note that from the first issue of 2016, MDPI journals use article numbers instead of page numbers. See further details here.

Related Articles

Article Metrics

Article Access Statistics

1

Comments

[Return to top]
Electronics EISSN 2079-9292 Published by MDPI AG, Basel, Switzerland RSS E-Mail Table of Contents Alert
Back to Top