Measurement and Characterisation of a Diffuse Acoustic Field Using a Phased Array

Abstract A diffuse acoustic field has been increasingly used to infer temporal changes in the structures, such as early dislocations and microcracking. This study explores three different techniques to characterise acoustic field by using a single ultrasonic phased array. The first two techniques ar...

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Autor principal:	Jingwei Cheng
Formato:	article
Lenguaje:	EN
Publicado:	SpringerOpen 2021
Materias:	Diffuse wave field Ultrasonic phased array Sensing Signal processing Ocean engineering TC1501-1800 Mechanical engineering and machinery TJ1-1570
Acceso en línea:	https://doaj.org/article/22f5212f008c4a3b83e9fffe5af6160c
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spelling	oai:doaj.org-article:22f5212f008c4a3b83e9fffe5af6160c2021-12-05T12:03:44ZMeasurement and Characterisation of a Diffuse Acoustic Field Using a Phased Array10.1186/s10033-021-00657-11000-93452192-8258https://doaj.org/article/22f5212f008c4a3b83e9fffe5af6160c2021-12-01T00:00:00Zhttps://doi.org/10.1186/s10033-021-00657-1https://doaj.org/toc/1000-9345https://doaj.org/toc/2192-8258Abstract A diffuse acoustic field has been increasingly used to infer temporal changes in the structures, such as early dislocations and microcracking. This study explores three different techniques to characterise acoustic field by using a single ultrasonic phased array. The first two techniques are proposed to measure spatial uniformity of wave field by examining differences in the integral of energy and the maximum energy respectively at multiple inspection locations. The third one is developed to evaluate the degree of phase coherence between propagating waves transmitted sequentially by two neighbouring array elements. The efficacy of these techniques are investigated by examining their metrics on simulations and well-known samples. The results suggest that two selected metrics can be used to quantitatively estimate the diffuse field start time as well as the field size by comparing their value with the idealised diffuse state (15% for the energy integral metric, η area and 1 for the phase coherence metric, η phase ) and identifying the convergence start point.Jingwei ChengSpringerOpenarticleDiffuse wave fieldUltrasonic phased arraySensingSignal processingOcean engineeringTC1501-1800Mechanical engineering and machineryTJ1-1570ENChinese Journal of Mechanical Engineering, Vol 34, Iss 1, Pp 1-9 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	Diffuse wave field Ultrasonic phased array Sensing Signal processing Ocean engineering TC1501-1800 Mechanical engineering and machinery TJ1-1570
spellingShingle	Diffuse wave field Ultrasonic phased array Sensing Signal processing Ocean engineering TC1501-1800 Mechanical engineering and machinery TJ1-1570 Jingwei Cheng Measurement and Characterisation of a Diffuse Acoustic Field Using a Phased Array
description	Abstract A diffuse acoustic field has been increasingly used to infer temporal changes in the structures, such as early dislocations and microcracking. This study explores three different techniques to characterise acoustic field by using a single ultrasonic phased array. The first two techniques are proposed to measure spatial uniformity of wave field by examining differences in the integral of energy and the maximum energy respectively at multiple inspection locations. The third one is developed to evaluate the degree of phase coherence between propagating waves transmitted sequentially by two neighbouring array elements. The efficacy of these techniques are investigated by examining their metrics on simulations and well-known samples. The results suggest that two selected metrics can be used to quantitatively estimate the diffuse field start time as well as the field size by comparing their value with the idealised diffuse state (15% for the energy integral metric, η area and 1 for the phase coherence metric, η phase ) and identifying the convergence start point.
format	article
author	Jingwei Cheng
author_facet	Jingwei Cheng
author_sort	Jingwei Cheng
title	Measurement and Characterisation of a Diffuse Acoustic Field Using a Phased Array
title_short	Measurement and Characterisation of a Diffuse Acoustic Field Using a Phased Array
title_full	Measurement and Characterisation of a Diffuse Acoustic Field Using a Phased Array
title_fullStr	Measurement and Characterisation of a Diffuse Acoustic Field Using a Phased Array
title_full_unstemmed	Measurement and Characterisation of a Diffuse Acoustic Field Using a Phased Array
title_sort	measurement and characterisation of a diffuse acoustic field using a phased array
publisher	SpringerOpen
publishDate	2021
url	https://doaj.org/article/22f5212f008c4a3b83e9fffe5af6160c
work_keys_str_mv	AT jingweicheng measurementandcharacterisationofadiffuseacousticfieldusingaphasedarray
_version_	1718372242376622080

Measurement and Characterisation of a Diffuse Acoustic Field Using a Phased Array

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