Adaptive sampling technique based on moving meshes for building data-equidistant inversion databases for NDT

Issue title: OIPE 2008

Article type: Research Article

Authors: Gyimóthy, Szabolcs^{a; *} | Kiss, Imre^a | Pávó, József^a

Affiliations: [a] Department of Broadband Infocommunications and Electromagnetic Theory, Budapest University of Technology and Economics, Budapest, Hungary

Correspondence: [*] Corresponding author: Szabolcs Gyimóthy, Department of Broadband Infocommunications and Electromagnetic Theory, Budapest University of Technology and Economics, Budapest, Hungary. Tel.: +36 1 4632918; Fax: +36 1 4633189; E-mail: gyimothy@evt.bme.hu

Abstract: An adaptive sampling method based on simplex-mesh refinement is proposed for creating a database that facilitates the inverse problem solution in NDT. The resulting database is used as a generic interpolator of the forward problem. In order to obtain optimal sampling for the purpose of interpolation, physically based mesh generation technique relying on spring analogy is utilized. The method is tested with a four-parameter crack reconstruction problem. It is demonstrated that the optimized database provides high interpolation quality comparing to regular grid databases.

Keywords: Inverse problems, database, nondestructive testing, interpolation

DOI: 10.3233/JAE-2009-1031

Journal: International Journal of Applied Electromagnetics and Mechanics, vol. 30, no. 3-4, pp. 309-319, 2009