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Article
Inversion of eddy current probe impedance data for crack reconstruction
Review of Progress in Quantitative Nondestructive Evaluation
  • John Bowler, University of Surrey
  • D. J. Harrison, Defense Research Agency
  • S. J. Norton, National Institute of Standards and Technology
Location
La Jolla, CA
Start Date
1-1-1993 12:00 PM
Description
The aim of eddy current inversion is to reconstruct an unknown flaw from probe signals measured as a function of probe position and frequency or time. In seeking the solution of an inverse problem, one can take advantage of an ability to solve forward problems by using predictions of probe signals calculated with a tentative estimate of the flaw. A well known inversion strategy adopted here for eddy current inversion, is that of varying the flaw estimate iteratively until the disparity between predicted and observed probe signals is minimized. Then the model flaw which gives the optimum predictions of the observations should approximate the actual flaw.
Book Title
Review of Progress in Quantitative Nondestructive Evaluation
Chapter
Chapter 1: Development of Standard Techniques
Section
Eddy Currents
Pages
243-249
DOI
10.1007/978-1-4615-2848-7_30
Language
en
File Format
application/pdf
Citation Information
John Bowler, D. J. Harrison and S. J. Norton. "Inversion of eddy current probe impedance data for crack reconstruction" Vol. 12A (1993)
Available at: http://works.bepress.com/john_bowler/27/