NDLI: Imaging the continuous conductivity profile within layered metal structures using inductance spectroscopy

Content Provider	IEEE Xplore Digital Library
Author	Wuliang Yin Dickinson, S.J. Peyton, A.J.
Copyright Year	2001
Abstract	This paper presents an inverse method for determining the conductivity distribution of a flat, layered conductor using a multifrequency electromagnetic sensor. Eddy-current sensors are used in a wide range of nondestructive testing applications. Single-frequency sensors are very common; however, the potential of an eddy-current sensor with spectroscopic techniques offers the ability to extract depth profiles and examine more fully the internal structure of the test piece. In this paper, the forward solution for a small right-cylindrical air-cored coil placed next to a layered conductor is based on the analytic solution provided by the transfer matrix approach. For an inverse solution, a modified Newton-Raphson method was used to adjust the conductivity profile to fit a set of multifrequency inductances in a least-squared sense. The approximate Jacobian matrix (sensitivity matrix) was obtained by the perturbation method. Numerical results of the forward solution are provided for cases of step, continuous conductivity profiles. Good estimates for the conductivity profile were obtained. Experimental eddy-current tests are performed by taking the difference in inductance of the coil when placed next to a reference conductor and next to a layered conductor over the range 100 kHz - 1 MHz. Inverse results based on experimental and simulated data verified this method.
Sponsorship	IEEE Sensors Council
Starting Page	161
Ending Page	166
Page Count	6
File Size	502911
File Format	PDF
ISSN	1530437X
Volume Number	5
Issue Number	2
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2005-04-01
Publisher Place	U.S.A.
Access Restriction	One Nation One Subscription (ONOS)
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Conductivity Inductance Spectroscopy Conductors Jacobian matrices Coils Inverse problems Nondestructive testing Newton method Perturbation methods multifrequency electromagnetic sensor Conductivity distribution layered conductor
Content Type	Text
Resource Type	Article
Subject	Instrumentation Electrical and Electronic Engineering

Sl.	Authority	Responsibilities	Communication Details
1	Ministry of Education (GoI), Department of Higher Education	Sanctioning Authority	https://www.education.gov.in/ict-initiatives
2	Indian Institute of Technology Kharagpur	Host Institute of the Project: The host institute of the project is responsible for providing infrastructure support and hosting the project	https://www.iitkgp.ac.in
3	National Digital Library of India Office, Indian Institute of Technology Kharagpur	The administrative and infrastructural headquarters of the project	Dr. B. Sutradhar bsutra@ndl.gov.in
4	Project PI / Joint PI	Principal Investigator and Joint Principal Investigators of the project	Dr. B. Sutradhar bsutra@ndl.gov.in Prof. Saswat Chakrabarti will be added soon
5	Website/Portal (Helpdesk)	Queries regarding NDLI and its services	support@ndl.gov.in
6	Contents and Copyright Issues	Queries related to content curation and copyright issues	content@ndl.gov.in
7	National Digital Library of India Club (NDLI Club)	Queries related to NDLI Club formation, support, user awareness program, seminar/symposium, collaboration, social media, promotion, and outreach	clubsupport@ndl.gov.in
8	Digital Preservation Centre (DPC)	Assistance with digitizing and archiving copyright-free printed books	dpc@ndl.gov.in
9	IDR Setup or Support	Queries related to establishment and support of Institutional Digital Repository (IDR) and IDR workshops	idr@ndl.gov.in

Evaluating the Permeability Distribution of a Layered Conductor by Inductance Spectroscopy

Electromagnetic Nondestructive Testing of Cylindrically Layered Conductors

The Electromagnetic Basis for Nondestructive Testing of Cylindrical Conductors

Absolute Conductivity Reconstruction in Magnetic Induction Tomography Using a Nonlinear Method

Image Reconstruction for High-Contrast Conductivity Imaging in Mutual Induction Tomography for Industrial Applications

Simultaneous measurement of distance and thickness of a thin metal plate with an electromagnetic sensor using a simplified model

An Innovative Microwave-Imaging Technique for Nondestructive Evaluation: Applications to Civil Structures Monitoring and Biological Bodies Inspection

Validation of a coil impedance model for simultaneous measurement of electromagnetic properties and inner diameter of a conductive tube

A Multifrequency Inexact-Newton Method in ${L^p}$ Banach Spaces for Buried Objects Detection

Imaging the continuous conductivity profile within layered metal structures using inductance spectroscopy

Similar Documents

Evaluating the Permeability Distribution of a Layered Conductor by Inductance Spectroscopy

Electromagnetic Nondestructive Testing of Cylindrically Layered Conductors

The Electromagnetic Basis for Nondestructive Testing of Cylindrical Conductors

Absolute Conductivity Reconstruction in Magnetic Induction Tomography Using a Nonlinear Method

Image Reconstruction for High-Contrast Conductivity Imaging in Mutual Induction Tomography for Industrial Applications

Simultaneous measurement of distance and thickness of a thin metal plate with an electromagnetic sensor using a simplified model

An Innovative Microwave-Imaging Technique for Nondestructive Evaluation: Applications to Civil Structures Monitoring and Biological Bodies Inspection

Validation of a coil impedance model for simultaneous measurement of electromagnetic properties and inner diameter of a conductive tube

A Multifrequency Inexact-Newton Method in ${L^p}$ Banach Spaces for Buried Objects Detection

Imaging the continuous conductivity profile within layered metal structures using inductance spectroscopy