Near-field model of ultrasonic array data

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Abstract

One method of efficiently modelling of ultrasonic array data is based on a combination of a ray-tracing approach and far-field scattering amplitude of a scatterer. This technique uses two main assumptions: all scatterers are located in the far-field from each array element and the size of each scatterer is small relative to its distance to array elements. The key part of the model is the so-called scattering matrix, which provides the amplitude and phase of scattered waves in the far-field of the scatterer. However, the far-field approximation fails when the size of the scatterer becomes comparable to its distance to array elements. In this paper a near-field model of ultrasonic array data is developed. In particular, it is shown that the near-field scattering behavior can be extracted from the scattering matrix. The applications of the model are discussed and supported with modelling examples.
Original languageEnglish
Title of host publication43rd Annual Review of Progress in Quantitative Nondestructive Evaluation
Subtitle of host publication(17–22 July 2016, Atlanta, Georgia, USA)
EditorsDale E Chimenti, Leonard J Bond
PublisherAmerican Institute of Physics (AIP)
Number of pages8
Volume36
ISBN (Print)9780735414747
DOIs
Publication statusPublished - 16 Feb 2017

Publication series

NameAIP Conference Proceedings
PublisherAIP
Volume1806
ISSN (Print)0094-243X
ISSN (Electronic)1551-7616

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