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Analysis of wavelength deviation of guided waves with electromagnetic acoustic transducers
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10.1063/1.4761976
/content/aip/journal/jap/112/8/10.1063/1.4761976
http://aip.metastore.ingenta.com/content/aip/journal/jap/112/8/10.1063/1.4761976
View: Figures

Figures

Image of FIG. 1.
FIG. 1.

Structures of EMATs for generating the guided waves: (a) SH waves and (b) Lamb waves.

Image of FIG. 2.
FIG. 2.

Dispersion curves of SH waves in a steel plate. The rectangle boxes indicate the operating zones.

Image of FIG. 3.
FIG. 3.

Schematic diagram of the excitation of SH waves in a plate.

Image of FIG. 4.
FIG. 4.

Schematic diagram of the excitation of SH waves at operating point O1 on the dispersion curve.

Image of FIG. 5.
FIG. 5.

The relationship between (a) wavelength-frequency curve and (b) time-frequency curve of SH waves.

Image of FIG. 6.
FIG. 6.

The detected waveforms at fourteen operating points.

Image of FIG. 7.
FIG. 7.

Time-frequency analysis of points M and N, and the 2nd, 8th, and 13th of the fourteen waveforms. (a) The excitation frequency f EMAT of the tone burst signals and (b) the frequency f GW of the detected wave signals.

Image of FIG. 8.
FIG. 8.

Experimental results of the relationship between α, f GW, f EMAT, measurements errors, and the amplitude voltage of detected wave signals. (a) f-α curves. (b) α-error and α- amplitude curves.

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/content/aip/journal/jap/112/8/10.1063/1.4761976
2012-10-26
2014-04-23
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752b84549af89a08dbdd7fdb8b9568b5 journal.articlezxybnytfddd
Scitation: Analysis of wavelength deviation of guided waves with electromagnetic acoustic transducers
http://aip.metastore.ingenta.com/content/aip/journal/jap/112/8/10.1063/1.4761976
10.1063/1.4761976
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