Fig. 1 ( a ) MCPRC histogram of ( a ) BR and ( b ) QIR strategies More about this image found in ( a ) MCPRC histogram of ( a ) BR and ( b ) QIR strategies

Fig. 2 ( a ) Type I—optimal decision variables: α opt , T opt , and M opt , ( b ) Type I—cost functions: σ , ϕ opt , and C ∞ , ( c ) Type II—optimal decision variables: α opt , T opt , and M opt , and ( d ) Type II—cost functions: σ , ϕ opt , and C ∞ More about this image found in ( a ) Type I—optimal decision variables: α opt , T opt , and M opt , ...

Fig. 3 ( a ) Type I—optimal decision variables: α opt , T opt , and M opt , ( b ) Type I—cost functions: σ , ϕ opt , and C ∞ , ( c ) Type II—optimal decision variables: α opt , T opt , and M opt , and ( d ) Type II—cost functions: σ , ϕ opt , and C ∞ More about this image found in ( a ) Type I—optimal decision variables: α opt , T opt , and M opt , ...

Fig. 4 ( a ) Type I—optimal decision variables: α opt , T opt , and M opt , ( b ) Type I—cost functions: σ , ϕ opt , and C ∞ , ( c ) Type II—optimal decision variables: α opt , T opt , and M opt , and ( d ) Type II—cost functions: σ , ϕ opt , and C ∞ More about this image found in ( a ) Type I—optimal decision variables: α opt , T opt , and M opt , ...

Fig. 1 Phase velocity ( c p ) curves for Lamb waves in aluminum. Frequency range of interest in this work is highlighted. Lines of constant wavelength are shown. Wave modes and wavelengths are labeled. More about this image found in Phase velocity ( c p ) curves for Lamb waves in aluminum. Frequency ...

Fig. 2 Schematic of the focused EMAT array. Generator EMAT and individual receiver EMATs are labeled. More about this image found in Schematic of the focused EMAT array. Generator EMAT and individual receiver...

Fig. 3 Schematic of scan technique for 10 × 10 × 0.5 mm defect in 1 mm aluminum plate. An example B-scan path and the full C-scan area are indicated. Step size for the C-scan is exaggerated for clarity. More about this image found in Schematic of scan technique for 10 × 10 × 0.5 mm defect in ...

Fig. 4 Example A-scan and spectrogram More about this image found in Example A-scan and spectrogram

Fig. 5 Peak power plots of the output from the focused generator EMAT. Lamb wave mode and wavelength of the generator signal are given in each plot. Plots are individually normalized. More about this image found in Peak power plots of the output from the focused generator EMAT. Lamb wave m...

Fig. 6 Focal spot width variation with generated signal wavelength for A0 mode (triangles) and S0 mode (circles) More about this image found in Focal spot width variation with generated signal wavelength for A0 mode (tr...

Fig. 7 Focal spot length variation with generated signal wavelength for A0 mode (triangles) and S0 mode (circles) More about this image found in Focal spot length variation with generated signal wavelength for A0 mode (t...

Fig. 8 Focal spot position variation with generated signal wavelength for A0 mode (triangles) and S0 mode (circles). Focal spot position is defined by the distance from the leading edge of the generator EMAT. More about this image found in Focal spot position variation with generated signal wavelength for A0 mode ...

Fig. 9 Beam profile for ( a ) unfocused EMAT and ( b ) focused EMAT: A0 mode at λ = 10 mm More about this image found in Beam profile for ( a ) unfocused EMAT and ( b ) focused EMAT: A0 mode at ...

Fig. 10 ( a ) Single A-scan from blank area of the plate using transmitted signal detector, ( b ) plot of signal amplitude at arrival time 67.3 μ s , and ( c ) B-scan of defect using transmitted signal detector. Peaks in ( a ) correspond with lighter lin... More about this image found in ( a ) Single A-scan from blank area of the plate using transmitted sig...

Fig. 11 C-scan using focal spot signal detector EMAT (B), A0 mode at λ = 10 mm . Known defect corner locations are indicated by dashed lines. More about this image found in C-scan using focal spot signal detector EMAT (B), A0 mode at λ = 10 ...

Fig. 12 C-scan using transmitted signal detector EMAT (A), A0 mode at λ = 10 mm . Known defect corner locations are indicated by dashed lines. More about this image found in C-scan using transmitted signal detector EMAT (A), A0 mode at λ = 10 ...

Fig. 13 C-scan using right side-reflected signal detector EMAT (C, right), A0 mode at λ = 10 mm . Known defect corner locations are indicated by dashed lines. More about this image found in C-scan using right side-reflected signal detector EMAT (C, right), A0 mode ...