Defect detection using ultrasonic arrays: The multi-mode total focusing method

Zhang, Jie; Drinkwater, Bruce W.; Wilcox, Paul D.; Hunter, Alan J.

doi:10.1016/j.ndteint.2009.10.001

Cited by 238 publications

(142 citation statements)

References 19 publications

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“…As expressed in Equation (2), imaging of FMC data is identical to that of SAFT [8] , except that the contribution to pixel intensity for FMC is determined from each transmit tx and receive rx pair, allowing for a significant improvement in the signal-tonoise ratio over that of conventional SAFT. Examination of this strategy reveals that conventional SAFT imaging can be obtained by taking the diagonal of the FMC dataset, and that by accounting for reciprocity of the pitch-catch time domain signals a reduced size of rx/2(rx+1) is possible [9] .…”

Section: Full Matrix Capturementioning

confidence: 99%

Virtual source aperture imaging for non-destructive testing

Sutcliffe¹,

Weston²,

Charlton³

et al. 2012

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Section: Full Matrix Capturementioning

confidence: 99%

Virtual source aperture imaging for non-destructive testing

Sutcliffe¹,

Weston²,

Charlton³

et al. 2012

insight

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“…A full signal data set from an ultrasonic array measurement system (termed the full matrix capture (FMC) array data set [1]) can generally be simulated efficiently using a hybrid ray-based forward model [2][3][4][5]. Such a model provides a fast tool to help simulate, design and optimise array inspection configurations [4].…”

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

“…Such a model provides a fast tool to help simulate, design and optimise array inspection configurations [4]. However, ray-based models become increasingly complex to implement for inspections involving multi-skip paths and mode conversions [4,6]. They are of particular importance in the optimization of immersion array configurations for defect detection and characterization using the TFM images from multiple different views of the same region.…”

Section: Introductionmentioning

confidence: 99%

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Methodologies for validating ray-based forward model using finite element method in ultrasonic array data simulation

Zhang¹,

Nixon²,

Barber³

et al. 2018

AIP Conference Proceedings

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Abstract. In this paper, a methodology of using finite element (FE) model to validate a ray-based model in the simulation of full matrix capture (FMC) ultrasonic array data set is proposed. The overall aim is to separate signal contributions from different interactions in FE results for easier comparing each individual component in the ray-based model results. This is achieved by combining the results from multiple FE models of the system of interest that include progressively more geometrical features while preserving the same mesh structure. It is shown that the proposed techniques allow the interactions from a large number of different ray-paths to be isolated in FE results and compared directly to the results from a ray-based forward model.

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“…For a variety of defects, bottom cracks caused by stress and fatigue are often hidden and dangerous. Present techniques for detecting bottom cracks, such as eddy current [1], [2], alternating current field measurement (ACFM) [3], and ultrasonic techniques [4] are used. As one of the nondestructive testing (NDT) techniques, potential drop technique has been used widely.…”

Section: Introductionmentioning

confidence: 99%

Novel Method for Sizing Metallic Bottom Crack Depth Using Multi-frequency Alternating Current Potential Drop Technique

Gan

Wan

et al. 2015

Measurement Science Review

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Potential drop techniques are of two types: the direct current potential drop (DCPD) technique and alternating current potential drop (ACPD) technique, and both of them are used in nondestructive testing. ACPD, as a kind of valid method in sizing metal cracks, has been applied to evaluate metal structures. However, our review of most available approaches revealed that some improvements can be done in measuring depth of metal bottom crack by means of ACPD, such as accuracy and sensitivity of shallow crack. This paper studied a novel method which utilized the slope of voltage ratio-frequency curve to solve bottom crack depth by using a simple mathematic equation based on finite element analysis. It is found that voltage ratio varies linearly with frequency in the range of 5-15 Hz; this range is slightly higher than the equivalent frequency and lower than semi-permeable frequency. Simulation and experiment show that the novel method can measure the bottom crack depth accurately.

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Defect detection using ultrasonic arrays: The multi-mode total focusing method

Cited by 238 publications

References 19 publications

Virtual source aperture imaging for non-destructive testing

Virtual source aperture imaging for non-destructive testing

Methodologies for validating ray-based forward model using finite element method in ultrasonic array data simulation

Novel Method for Sizing Metallic Bottom Crack Depth Using Multi-frequency Alternating Current Potential Drop Technique

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