Bispectral analysis of ultrasonic inter-modulation data for improved defect detection

Andrew J Hillis; S A Neild; B W Drinkwater; P D Wilcox

doi:10.1063/1.2184515

Bispectral analysis of ultrasonic inter-modulation data for improved defect detection

Andrew J Hillis, S A Neild, B W Drinkwater, P D Wilcox

Department of Mechanical Engineering

Research output: Contribution to conference › Paper › peer-review

Abstract

This paper describes the use of the ultrasonic inter-modulation technique for damage detection, which can offer potentially far greater sensitivity than linear acoustical methods. The specimen is excited by two continuous sinusoidal ultrasonic signals at different frequencies and the resultant vibration signal is captured for interrogation. A sensitive signal processing technique, known as bispectral analysis, is utilised which has the property of suppressing signal noise, permitting the detection of small nonlinear effects in the received vibration signal. This approach is demonstrated experimentally on samples containing fatigue cracking. A model is also presented which highlights the benefits of the bispectrum approach and potentially allows for characterisation of the nonlinearity.

Original language	English
Pages	89-96
Number of pages	8
DOIs	https://doi.org/10.1063/1.2184515
Publication status	Published - 2006
Event	32nd Annual Review of Process in Quantitative Nondestructive Evaluation - Brunswick, Montenegro Duration: 31 Jul 2005 → 5 Aug 2005

Conference

Conference	32nd Annual Review of Process in Quantitative Nondestructive Evaluation
Country/Territory	Montenegro
City	Brunswick
Period	31/07/05 → 5/08/05

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10.1063/1.2184515

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title = "Bispectral analysis of ultrasonic inter-modulation data for improved defect detection",

abstract = "This paper describes the use of the ultrasonic inter-modulation technique for damage detection, which can offer potentially far greater sensitivity than linear acoustical methods. The specimen is excited by two continuous sinusoidal ultrasonic signals at different frequencies and the resultant vibration signal is captured for interrogation. A sensitive signal processing technique, known as bispectral analysis, is utilised which has the property of suppressing signal noise, permitting the detection of small nonlinear effects in the received vibration signal. This approach is demonstrated experimentally on samples containing fatigue cracking. A model is also presented which highlights the benefits of the bispectrum approach and potentially allows for characterisation of the nonlinearity.",

author = "Hillis, {Andrew J} and Neild, {S A} and Drinkwater, {B W} and Wilcox, {P D}",

note = "See also: AIP Conf. Proc. -- March 6, 2006 -- Volume 820, pp. 89-96, QUANTITATIVE NONDESTRUCTIVE EVALUATION; doi:10.1063/1.2184515; 32nd Annual Review of Process in Quantitative Nondestructive Evaluation ; Conference date: 31-07-2005 Through 05-08-2005",

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doi = "10.1063/1.2184515",

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pages = "89--96",

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AU - Neild, S A

AU - Drinkwater, B W

AU - Wilcox, P D

N1 - See also: AIP Conf. Proc. -- March 6, 2006 -- Volume 820, pp. 89-96, QUANTITATIVE NONDESTRUCTIVE EVALUATION; doi:10.1063/1.2184515

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N2 - This paper describes the use of the ultrasonic inter-modulation technique for damage detection, which can offer potentially far greater sensitivity than linear acoustical methods. The specimen is excited by two continuous sinusoidal ultrasonic signals at different frequencies and the resultant vibration signal is captured for interrogation. A sensitive signal processing technique, known as bispectral analysis, is utilised which has the property of suppressing signal noise, permitting the detection of small nonlinear effects in the received vibration signal. This approach is demonstrated experimentally on samples containing fatigue cracking. A model is also presented which highlights the benefits of the bispectrum approach and potentially allows for characterisation of the nonlinearity.

AB - This paper describes the use of the ultrasonic inter-modulation technique for damage detection, which can offer potentially far greater sensitivity than linear acoustical methods. The specimen is excited by two continuous sinusoidal ultrasonic signals at different frequencies and the resultant vibration signal is captured for interrogation. A sensitive signal processing technique, known as bispectral analysis, is utilised which has the property of suppressing signal noise, permitting the detection of small nonlinear effects in the received vibration signal. This approach is demonstrated experimentally on samples containing fatigue cracking. A model is also presented which highlights the benefits of the bispectrum approach and potentially allows for characterisation of the nonlinearity.

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DO - 10.1063/1.2184515

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T2 - 32nd Annual Review of Process in Quantitative Nondestructive Evaluation

Y2 - 31 July 2005 through 5 August 2005

ER -

Bispectral analysis of ultrasonic inter-modulation data for improved defect detection

Abstract

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