MONTE-CARLO INVERSION OF TRAVEL-TIME DATA FOR THE ESTIMATION OF WELD MODEL PARAMETERS

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Abstract

The quality of ultrasonic array imagery is adversely affected by uncompensated variations in the medium properties. A method for estimating the parameters of a general model of an inhomogeneous anisotropic medium is described. The model is comprised of a number of homogeneous sub-regions with unknown anisotropy. Bayesian estimation of the unknown model parameters is performed via a Monte-Carlo Markov chain using the Metropolis-Hastings algorithm. Results are demonstrated using simulated weld data.

Original languageEnglish
Title of host publicationREVIEW OF PROGRESS IN QUANTITATIVE NONDESTRUCTIVE EVALUATION, VOLS 30A AND 30B
EditorsDO Thompson, DE Chimenti
Place of PublicationMELVILLE
PublisherAmerican Institute of Physics (AIP)
Pages604-611
Number of pages8
ISBN (Print)978-0-7354-0888-3
DOIs
Publication statusPublished - 2011
Event37th Annual Review of Progress in Quantitative Nondestructive Evaluation (QNDE 2010) - San Diego, CA, United States
Duration: 18 Jul 201023 Jul 2010
Conference number: 37

Conference

Conference37th Annual Review of Progress in Quantitative Nondestructive Evaluation (QNDE 2010)
Abbreviated titleQNDE 2010
CountryUnited States
CitySan Diego, CA
Period18/07/1023/07/10

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