Near-field model of ultrasonic array data

Alexander Velichko

doi:10.1063/1.4974588

Near-field model of ultrasonic array data

Alexander Velichko

Research output: Chapter in Book/Report/Conference proceeding › Conference Contribution (Conference Proceeding)

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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 language	English
Title of host publication	43rd Annual Review of Progress in Quantitative Nondestructive Evaluation
Subtitle of host publication	(17–22 July 2016, Atlanta, Georgia, USA)
Editors	Dale E Chimenti, Leonard J Bond
Publisher	American Institute of Physics (AIP)
Number of pages	8
Volume	36
ISBN (Print)	9780735414747
DOIs	https://doi.org/10.1063/1.4974588
Publication status	Published - 16 Feb 2017

Publication series

Name	AIP Conference Proceedings
Publisher	AIP
Volume	1806
ISSN (Print)	0094-243X
ISSN (Electronic)	1551-7616

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10.1063/1.4974588

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title = "Near-field model of ultrasonic array data",

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.",

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Near-field model of ultrasonic array data. / Velichko, Alexander.

43rd Annual Review of Progress in Quantitative Nondestructive Evaluation: (17–22 July 2016, Atlanta, Georgia, USA). ed. / Dale E Chimenti; Leonard J Bond. Vol. 36 American Institute of Physics (AIP), 2017. 040001 (AIP Conference Proceedings; Vol. 1806).

Research output: Chapter in Book/Report/Conference proceeding › Conference Contribution (Conference Proceeding)

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N2 - 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.

AB - 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.

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A2 - Chimenti, Dale E

A2 - Bond, Leonard J

PB - American Institute of Physics (AIP)

ER -

Near-field model of ultrasonic array data

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