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Safizadeh, Mir Saeed; Lepine, B. A.; Forsyth, David; Fahr, A.

doi:10.1023/a:1012244208475

Cited by 35 publications

(4 citation statements)

References 1 publication

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“…The measurement system we developed in our laboratory is shown in figure 5. Each coil consists of 400 turns whose dimensions are 10 mm (height), 12 mm (inner diameter), 18 mm (outer diameter) and 0.5 mm (average lift-off) [12]. The electrical bridge is loaded with a pulsed voltage signal provided by a NI-DAQ6281 PCI board followed by an analogue power amplifier.…”

Section: Measuring Set-upmentioning

confidence: 99%

Galois sequences in the non-destructive evaluation of metallic materials

Burrascano

Carpentieri

Pirani

et al. 2006

Meas. Sci. Technol.

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A new eddy currents non-destructive evaluation technique for the investigation of deep defects is presented. The method joins the favourable features of the pulsed eddy currents approach with the peculiar properties of the Galois sequences to extend the detection area down to large depths. The proposed method has been successfully tested on a benchmark; the experimental results have been compared with the standard pulsed method and with numerical simulations. The comparisons confirmed the accuracy of the method and its effectiveness in allowing a significant improvement in deep defect detection.

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Section: Measuring Set-upmentioning

confidence: 99%

Galois sequences in the non-destructive evaluation of metallic materials

Burrascano

Carpentieri

Pirani

et al. 2006

Meas. Sci. Technol.

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“…, -, . , -STFT (short time frequency transform), WVD (Wigner-Ville distribution), SPWVD (smoothed pseudo Wigner-Ville distribution) (Rihaczek, 1968;Imberger and Boashash, 1986;Safizadeh et al, 2001;Shui et al, 2007;Dong and Cui, 2012).…”

Section: 서 론mentioning

confidence: 99%

Time-Frequency Analysis of Broadband Acoustic Scattering from Chub Mackerel Scomber japonicus, Goldeye Rockfish Sebastes thompsoni, and Fat Greenling Hexagrammos otakii

Lee

2015

Korean Journal of Fisheries and Aquatic Sciences

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Broadband echoes measured in live chub mackerel Scomber japonicus, goldeye rockfish Sebastes thompsoni, and fat greenling Hexagrammos otakii with different morphologies and internal characteristics were analyzed in time and frequency domains to understand the species-specific echo feature characteristics for classifying fish species. The mean echo image for each time-frequency representation dataset obtained as a function of orientation angle was extracted to mitigate the effect of fish orientation on acoustic scattering. The joint time-frequency content of the broadband echo signals was obtained using the smoothed pseudo-Wigner-Ville distribution (SPWVD). The SPWVDs were analyzed for each echo signature of the three fish species. The results show that the time-frequency analysis provided species-specific echo structure patterns and metrics of the broadband acoustic signals to facilitate fish species classification.

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“…Finally, we would like to note that in perspective the experimental data to be processed could be attained by exploiting real multi-frequency excitation signals as in the case of pulsed eddy currents technique [57][58][59][60].…”

Section: Multi-frequency Excitation and Related Svd Normalizationmentioning

confidence: 99%

Multi-frequency identification of defects in conducting media

et al. 2008

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An eddy currents based procedure for the 3D image reconstruction of defects in metallic plates from multi-frequency data is presented. In particular, we exploit the collection of data at different probe positions as well as at different excitation frequencies in order to improve the amount of information content, the accuracy of the inverse methodology and its robustness against the experimental noise. The identification tool we developed, exploits the geometric A − χ formulation for the solution of the eddy-current forward problem together with a full nonlinear iterative inversion algorithm based on the total variation regularization.

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Untitled

Cited by 35 publications

References 1 publication

Galois sequences in the non-destructive evaluation of metallic materials

Galois sequences in the non-destructive evaluation of metallic materials

Time-Frequency Analysis of Broadband Acoustic Scattering from Chub Mackerel Scomber japonicus, Goldeye Rockfish Sebastes thompsoni, and Fat Greenling Hexagrammos otakii

Multi-frequency identification of defects in conducting media

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