Reconstruction of reflector images using the C-SAFT method with account for the anisotropy of the material of the test object
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- 作者：E. G. Bazulin
- 关键词：ultrasonic nondestructive testing ; antenna array ; double scanning ; Full Matrix Capture (FMC) ; triple scanning ; C ; SAFT method ; Total Focusing Method (TFM) ; digital focusing with an antenna array (DFA) ; anisotropy ; finite ; difference method in the time domain (FDTD)
- 刊名：Russian Journal of Nondestructive Testing
- 出版年：2015
- 出版时间：April 2015
- 年：2015
- 卷：51
- 期：4
- 页码：217-226
- 全文大小：1,611 KB
- 参考文献：1.Bazulin, E.G., Comparison of systems for ultrasonic nondestructive testing using antenna arrays or phased antenna arrays, Russ. J. Nondestr. Test., 2013, no. 7, pp. 404鈥?23.
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14.Bazulin, E.G., Reconstruction of images of reflectors using the correlation method at an arbitrary number of reflections of an ultrasonic pulse from the boundary of a test object that consists of regions with different acoustic properties, Russ. J. Nondestr. Test., 2014, no. 9, pp. 515鈥?30.
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17.Bazulin, E.G. and Ismailov, G.M., Simultaneous measurement of the velocity of an ultrasonic shear wave and the thickness of a test object with plane-parallel boundaries using two antenna arrays, Russ. J. Nondestr. Test., 2013, no. 8, pp. 446鈥?57. - 作者单位：E. G. Bazulin (1)
1. ECHO+ Scientific and Production Center, ul. Tvardovskogo 8, Technopark Strogino, Moscow, 123458, Russia - 刊物类别：Chemistry and Materials Science
- 刊物主题：Chemistry
Characterization and Evaluation Materials
Structural Materials
Russian Library of Science - 出版者：MAIK Nauka/Interperiodica distributed exclusively by Springer Science+Business Media LLC.
- ISSN：1608-3385
文摘
A modification of the combined SAFT (C-SAFT) method for reconstructing reflector images in a test object, which consists of several regions with different acoustic properties, in particular, anisotropy properties, is proposed. A method for the direct construction of a family of rays, which exit from the point where a transmitter is positioned, is used to calculate the ray trajectories with consideration for the anisotropy. After the family of rays is constructed, it is possible to analyze their attribution to a certain acoustic scheme and to approximate the calculated delays on the spatial grid of the region of iterest (ROI). This will allow one to calculate the pulse travel time from a transmitter to any point of the ROI and back to the receiver and to use the C-SAFT method for reconstructing reflector images. During processing of echo signals that were calculated in the CIVA program, the efficiency of the proposed method was demonstrated. Accounting for the anisotropy in a model experiment increased the focusing quality when reconstructing images of side-drilled holes in a specimen with a repair weld.