Application of frequency compounding to ultrasonic signals for the NDE of concrete

Kwok Shun Ho, Minghui Li, Richard O'Leary, Anthony Gachagan

Research output: Chapter in Book/Report/Conference proceedingConference contribution book

8 Citations (Scopus)

Abstract

In ultrasonic NDT of heterogeneous materials the internal microstructure of the material produces backscattered noise that can make the detection of true defects difficult. The noise is caused by the stationary scatterers that cause constructive and destructive interference to the propagating wavefront. Morevoer, in situations where the defects are significantly larger than these random scatterers, defects detection is significantly limited due to the presence of the additive noise caused by the interfering scatterers. This interference causes the presence of speckle noise in ultrasound imaging, thereby limiting the detectability, and making images generally difficult to interpret. Speckle also limits automated computer-aided analysis, such as edge detection, and 3D display. In this study, Frequency Compounding (FC) method has been applied to the ultrasonic signals in concrete. Due to the heterogeneous nature of the material, the received echoes suffer from clutter arising from the material microstructure. In this study, it was shown in simulations that the signal-to-noise ratio (SNR) of the A-scan signals can be improved by splitting the spectrum into narrower subbands and sum. Experiments were performed to validate the simulated results. The possibility of using this type of processing in such material and merits are discussed.
LanguageEnglish
Title of host publicationReview of Progress in Quantitative Nondestructive Evaluation
EditorsD.O. Thompson, D.E. Chimenti
Place of PublicationMelville
Pages1508-1515
Number of pages8
Volume31A & 31B
DOIs
Publication statusPublished - 2012
Event38th Annual Review of Progress in Quantitative Nondestructive Evaluation (QNDE) - Burlington, United States
Duration: 17 Jul 201122 Jul 2011

Publication series

NameAIP Conference Proceedings
PublisherAIP
Volume1430
ISSN (Print)0094-243X

Conference

Conference38th Annual Review of Progress in Quantitative Nondestructive Evaluation (QNDE)
CountryUnited States
CityBurlington
Period17/07/1122/07/11

Fingerprint

Ultrasonics
Concretes
Speckle
Computer aided analysis
Defects
Microstructure
Additive noise
Edge detection
Wavefronts
Nondestructive examination
Acoustic noise
Signal to noise ratio
Display devices
Imaging techniques
Processing
Experiments

Keywords

  • frequency compounding signal processing technique
  • non-destructive evaluation (NDE)
  • concrete
  • structural noise reduction

Cite this

Ho, K. S., Li, M., O'Leary, R., & Gachagan, A. (2012). Application of frequency compounding to ultrasonic signals for the NDE of concrete. In D. O. Thompson, & D. E. Chimenti (Eds.), Review of Progress in Quantitative Nondestructive Evaluation (Vol. 31A & 31B, pp. 1508-1515). (AIP Conference Proceedings; Vol. 1430). Melville. https://doi.org/10.1063/1.4716394
Ho, Kwok Shun ; Li, Minghui ; O'Leary, Richard ; Gachagan, Anthony. / Application of frequency compounding to ultrasonic signals for the NDE of concrete. Review of Progress in Quantitative Nondestructive Evaluation. editor / D.O. Thompson ; D.E. Chimenti. Vol. 31A & 31B Melville, 2012. pp. 1508-1515 (AIP Conference Proceedings).
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abstract = "In ultrasonic NDT of heterogeneous materials the internal microstructure of the material produces backscattered noise that can make the detection of true defects difficult. The noise is caused by the stationary scatterers that cause constructive and destructive interference to the propagating wavefront. Morevoer, in situations where the defects are significantly larger than these random scatterers, defects detection is significantly limited due to the presence of the additive noise caused by the interfering scatterers. This interference causes the presence of speckle noise in ultrasound imaging, thereby limiting the detectability, and making images generally difficult to interpret. Speckle also limits automated computer-aided analysis, such as edge detection, and 3D display. In this study, Frequency Compounding (FC) method has been applied to the ultrasonic signals in concrete. Due to the heterogeneous nature of the material, the received echoes suffer from clutter arising from the material microstructure. In this study, it was shown in simulations that the signal-to-noise ratio (SNR) of the A-scan signals can be improved by splitting the spectrum into narrower subbands and sum. Experiments were performed to validate the simulated results. The possibility of using this type of processing in such material and merits are discussed.",
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Ho, KS, Li, M, O'Leary, R & Gachagan, A 2012, Application of frequency compounding to ultrasonic signals for the NDE of concrete. in DO Thompson & DE Chimenti (eds), Review of Progress in Quantitative Nondestructive Evaluation. vol. 31A & 31B, AIP Conference Proceedings, vol. 1430, Melville, pp. 1508-1515, 38th Annual Review of Progress in Quantitative Nondestructive Evaluation (QNDE), Burlington, United States, 17/07/11. https://doi.org/10.1063/1.4716394

Application of frequency compounding to ultrasonic signals for the NDE of concrete. / Ho, Kwok Shun; Li, Minghui; O'Leary, Richard; Gachagan, Anthony.

Review of Progress in Quantitative Nondestructive Evaluation. ed. / D.O. Thompson; D.E. Chimenti. Vol. 31A & 31B Melville, 2012. p. 1508-1515 (AIP Conference Proceedings; Vol. 1430).

Research output: Chapter in Book/Report/Conference proceedingConference contribution book

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AU - Gachagan, Anthony

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Y1 - 2012

N2 - In ultrasonic NDT of heterogeneous materials the internal microstructure of the material produces backscattered noise that can make the detection of true defects difficult. The noise is caused by the stationary scatterers that cause constructive and destructive interference to the propagating wavefront. Morevoer, in situations where the defects are significantly larger than these random scatterers, defects detection is significantly limited due to the presence of the additive noise caused by the interfering scatterers. This interference causes the presence of speckle noise in ultrasound imaging, thereby limiting the detectability, and making images generally difficult to interpret. Speckle also limits automated computer-aided analysis, such as edge detection, and 3D display. In this study, Frequency Compounding (FC) method has been applied to the ultrasonic signals in concrete. Due to the heterogeneous nature of the material, the received echoes suffer from clutter arising from the material microstructure. In this study, it was shown in simulations that the signal-to-noise ratio (SNR) of the A-scan signals can be improved by splitting the spectrum into narrower subbands and sum. Experiments were performed to validate the simulated results. The possibility of using this type of processing in such material and merits are discussed.

AB - In ultrasonic NDT of heterogeneous materials the internal microstructure of the material produces backscattered noise that can make the detection of true defects difficult. The noise is caused by the stationary scatterers that cause constructive and destructive interference to the propagating wavefront. Morevoer, in situations where the defects are significantly larger than these random scatterers, defects detection is significantly limited due to the presence of the additive noise caused by the interfering scatterers. This interference causes the presence of speckle noise in ultrasound imaging, thereby limiting the detectability, and making images generally difficult to interpret. Speckle also limits automated computer-aided analysis, such as edge detection, and 3D display. In this study, Frequency Compounding (FC) method has been applied to the ultrasonic signals in concrete. Due to the heterogeneous nature of the material, the received echoes suffer from clutter arising from the material microstructure. In this study, it was shown in simulations that the signal-to-noise ratio (SNR) of the A-scan signals can be improved by splitting the spectrum into narrower subbands and sum. Experiments were performed to validate the simulated results. The possibility of using this type of processing in such material and merits are discussed.

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KW - non-destructive evaluation (NDE)

KW - concrete

KW - structural noise reduction

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M3 - Conference contribution book

SN - 9780735410138

VL - 31A & 31B

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EP - 1515

BT - Review of Progress in Quantitative Nondestructive Evaluation

A2 - Thompson, D.O.

A2 - Chimenti, D.E.

CY - Melville

ER -

Ho KS, Li M, O'Leary R, Gachagan A. Application of frequency compounding to ultrasonic signals for the NDE of concrete. In Thompson DO, Chimenti DE, editors, Review of Progress in Quantitative Nondestructive Evaluation. Vol. 31A & 31B. Melville. 2012. p. 1508-1515. (AIP Conference Proceedings). https://doi.org/10.1063/1.4716394