Application of an ultrasonic antenna array for registering echo signals by the double-scanning method for obtaining flaw images |
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Authors: | E G Bazulin S A Kokolev A S Golubev |
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Affiliation: | (1) EKhO+ Research and Production Center, pl. Akademika Kurchatova 1, Moscow, 123182, Russia |
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Abstract: | 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. |
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