Application of an ultrasonic antenna array for registering echo signals by the double-scanning method for obtaining flaw images

The prospects for applying the double-scanning mode in ultrasonic nondestructive testing for recording echo signals are considered. A variant of implementing the double-scanning mode using a phased antenna array is proposed. Algorithms for reconstructing flaw images by the method of projection in th...

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Bibliographic Details
Published in:Russian journal of nondestructive testing 2009-02, Vol.45 (2), p.86-97
Main Authors: Bazulin, E. G., Kokolev, S. A., Golubev, A. S.
Format: Article
Language:English
Subjects:
Acoustic Methods
Antenna arrays
Characterization and Evaluation of Materials
Chemistry and Materials Science
Materials Science
Mathematical models
Nondestructive testing
Recording
Spectra
Structural Materials
Ultrasonic testing
Ultrasound
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Summary:The prospects for applying the double-scanning mode in ultrasonic nondestructive testing for recording echo signals are considered. A variant of implementing the double-scanning mode using a phased antenna array is proposed. Algorithms for reconstructing flaw images by the method of projection in the spectral space and the combined SAFT (C-SAFT) method are presented. It is shown that, to obtain high-quality flaw images, the ultrasound propagation velocity in a tested object must be known to within a high accuracy (at least 0.5%). The results of numerical and model experiments in which images were obtained by these methods are presented.
ISSN:1061-8309
1608-3385
DOI:10.1134/S1061830909020028