Abstract
A 3D variant of the coherent method of projection in the spectral space (PSS) for obtaining images of reflectors on the basis of measured echo signals is considered. Its application allows recon-struction of reflector images with a high frontal resolution in both the main plane of an ultrasonic transducer and an additional plane. The application of the PSS method is especially efficient when a reflector is far from the receiving aperture. In this case, it is possible to increase the signal-to-noise ratio by more than 12 dB and a tenfold increase in the frontal resolution can sometimes be attained as compared to the 2D layer-by-layer variant of the PSS method. Examples of the application of this method during reconstruction of reflector images in a specimen of the wall of a chemical reactor, in the case of multiple reflections from the walls of a welded T-branch with an overlaid plate (WTP), and when testing large-diameter studs and supports of the divertor, which is manufactured as part of the work on the thermonuclear reactor (ITER) project, are presented. The efficiency of applying the 3D variant of the PSS method for testing at large depths is shown.
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Kachanov, E.I., Pigulevskii, E.D., and Yarichin, E.M., Metody i sredstva gidroakusticheskoi golografii (Methods and Tools of Hydroacoustic Holography), Leningrad: Sudostroenie, 1989.
Bazulin, A.E., Gordeev, Yu.L., Kostylov, A.G., Tikhonov, D.S., and Shtern, A.M., Mobile AVGUR-series measuring automated ultrasonic testing systems, V Mire Nerazrush. Kontr., 2010, no. 1(47), pp. 16–23.
Burov, V.A., Goryunov, A.A., Saskovets, A.V., and Tikhonova, T.A., Inverse problems in acoustics (review), Akust. Zh., 1986, vol. XXXII, no. 4, pp. 433–449.
Goryunov, A.A. and Saskovets, A.V., Obratnye zadachi rasseyaniya v akustike (Inverse Scattering Problems in Acoustics), Moscow: MGU, 1989.
Hall, T.E., Doctor, S.R., Reid, L.D., Littlield, R.J., and Gilber, R.W., Implementation of real-time ultrasonic SAFT system for inspection of nuclear reactor components, Acoust. Imaging, 1987, vol. 15, pp. 253–266.
Erhard, A., Lucht, B., Schulz, E., Montag, H.-J., Wüstenberg, H., and Beine, U., Characterization of defects in austenitic pipe gird welds, The J. Nondestr. Test. & Ultrason., ISSN: 1435-4934, 2000, vol. 5, no. 9.
Osetrov, A.V., Theory of spatiotemporal diffraction tomography during scanning of a single transceiver over a plane, Akust. Zh., 1991, vol. XXXVII, no. 3, pp. 528–534.
Kovalev, A.V., Kozlov, V.N., Samokrutov, A.A., Shevaldykin, V.G., and Yakovlev, N.N., Impulse echo method in concrete testing. Noise and spatial selection, Defektoskopiya, 1990, no. 2, pp. 29–41.
Mayer, K., Markelein, R., Langenberg, K.J., and Kreutter, T., Three-dimensional imaging system based on Fourier transformation synthetic aperture focusing technique, Ultrasonics, 1990, no. 28, pp. 241–255.
Takahashi, F., Nagashima, Y., Tanaka, I., Igeta, M., and Nakada, S., Ultrasonic sizing and recognition of cracks and porosities in weld metals using acoustical holographic inspections, First Int. Conf. on NDE in Relation to Structural Integrity for Nuclear and Pressurized Components, Amsterdam, Netherlands, 1998.
Badalyan, V.G. and Bazulin, E.G., Digital reconstruction of scatterer images by the method of projection in the spectral space, Akust. Zh., 1988, vol. XXXIV, no. 2, pp. 222–231.
Advances in Phased Array Ultrasonic Technology Applications, Waltham, MA: Olympus NDT, 2007; http://www.olympus-ims.com/en/books/
X-32 FAR-defektoskop (X-32 PAA flaw detector), http://www.harfang.ru/content/x-32.html
OMNISCAN MX FAR-defektoskop (OMNISCAN MX PAA flaw detector), http://www.olympus-ims.com/ru/omniscan-mx/
MULTIX POCKET 64 × 64 FAR-defektoskop (MULTIX POCKET 64 × 64 PAA flaw detector), http://www.m2m-ndt.com/products-1-25-en.html
ISONIC 2009 FAR-defektoskop (ISONIC 2009 PAA flaw detector), http://www.sonotronndt.com/i2009.htm
CTS-602 FAR-defektoskop (CTS-602 PAA flaw detector), http://www.siui.com/enH/products-view-c5-9-21-35-i28.html
Devaney, A.J., Fundamental limitation inverse source and scattering problem in NDT, Rev. Progr. Quant. Nondestr. Eval., 1986, vol. 5A, pp. 303–317.
Goodman, J.W., Introduction to Fourier Optics, New York: McGraw-Hill, 1971.
Bazulin, A.E., Bazulin, E.G., and Kokolev, S.A., Application of linear interpolation for improving the quality of flaw images obtained by the spectral projection method during ultrasonic nondestructive testing, Russ. J. Nondestr. Test., 2009, vol. 45, no. 12, pp. 823–838.
Bazulin, E.G., Obtaining flaw images that take the effect of multiple ultrasonic pulse reflections from the boundaries of a test object into account, Russ. J. Nondestr. Test., 2010, vol. 46, no. 10, pp. 735–753.
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Original Russian Text © A.E. Bazulin, E.G. Bazulin, A.Kh. Vopilkin, S.A. Kokolev, S.V. Romashkin, D.S. Tikhonov, 2014, published in Defektoskopiya, 2014, Vol. 50, No. 2, pp. 46–65.
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Bazulin, A.E., Bazulin, E.G., Vopilkin, A.K. et al. Application of 3D coherent processing in ultrasonic testing. Russ J Nondestruct Test 50, 92–108 (2014). https://doi.org/10.1134/S1061830914020028
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DOI: https://doi.org/10.1134/S1061830914020028