Increasing the signal-to-noise ratio during joint use of the spectrum extrapolation and splitting methods
Source abstract
Abstract
The possibility of increasing the signal-to-noise ratio by the method of echo-signal spectrum splitting jointly with spectrum extrapolation is considered. The essence of the method proposed is that the echo-signal spectrum known within a given frequency range (f min, f max) is divided into several subranges (f min i , f max i ). The construction of the AR model of the echo-signal spectrum allows the spectrum extrapolation from each subrange by an interval (f min e , f max e that far exceeds the initial interval. This means that, with the use of one echo signal, a set of signals can be obtained, the adding together of which increases the signal-to-noise ratio and ensures an ultrafine beam resolution for flaw images. The presented results of processing echo signals, which were obtained in numerical and model experiments, confirm the efficiency of the proposed technique for processing echo signals.
Source: openalex_inverted_index · Quality: baseline
Research context
OpenAlex topics: Image and Signal Denoising Methods · Ultrasonics and Acoustic Wave Propagation · Electrical and Bioimpedance Tomography
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
References (24)
Show source-provided references
1. Levin, B.R., Teoriya sluchainykh protsessoy i ee primenenie v radiotekhnike (The Theory of Random Processes and Its Application in Radio Engineering), Moscow: Sov. Radio, 1960.
2. Certo, M., Three-Dimensional Defect Imaging by Multifrequency Acoustical Holography, Mater. Eval., 1983, vol. 41, no. 7, pp. 946–950.
3. 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. 253–266.10.1007/978-1-4684-5320-1_23 ↗
4. Erhard, A., Lucht, B., Schulz, E., Montag, H.-J., Wüstenberg, H., and Beine, U., Characterization of Defects in Austenitic Pipe Gird Welds, The e-J. NDT Ultrason., 2000, vol. 5, no. 9, http://www.ndt.net/v05n05.htm.
5. Osetrov, A.V., The Theory of Time-and-Spatial Diffraction Tomography for a Single Transceiver Scanning over a Plane, Akust. Zh., 1991, vol. 37, no. 3, pp. 528–534.
6. Goryunov, A.A. and Saskovets, A.V., Obratnye zadachi rasseyaniya v akustike (Inverse Scattering Problems in Acoustics), Moscow: Izd. Mosk. Gos. Univ., 1989.
7. Nahamoo, D., Pan, B.X., and Kak, A.S., Synthetic Aperture Diffraction Tomography and Its Interpolation Free Implementation, IEEE Trans. Sonics Ultrason., 1984, vol. SU-31, pp. 218–229.10.1109/T-SU.1984.31502 ↗
8. Bazulin, E.G., On the Possibility of Using Double Scanning in Ultrasonic Testing for Improving Quality of Scatterer Images, Akust. Zh., 2001, vol. 47, no. 6, pp. 741–745.
9. Kovalev, A.V., Kozlov, V.N., Samokrutov, A.A., Shevaldykin, V.G., and Yakovlev, N.N., Pulsed Echo Method for Concrete Inspection. Noise and Spatial Selection, Defektoskopiya, 1990, no. 2, pp. 29–41.
10. Grebennikov, V.V., Gurvich, A.K., and Grigor’ev, M.V., Multifrequency Technique for Ultrasonic Testing of Austenitic Welded Joints, Defektoskopiya, 1974, no. 1, pp. 81–89.
11. Grebennikov, V.V. and Gurvich, A.K., The State and Problems of Ultrasonic Testing of Austenitic Welded Joints, Defektoskopiya, 1985, no. 9, pp. 3–12.
12. Bazulin, E.G., Primenenie metodov sverkhrazresheniya dlya povysheniya otnosheniya signal/shum v austenitnykh materialakh (Application of Superresolution Methods for Increasing the Signal-to-Noise Ratio in Austenitic Materials), Moscow: Ekho+, 1997.
13. Grebennikov, V.V. and Grebennikov, D.V., Avtomatizirovannyi kontrol’ s pomoshch’yu sistemy Avgur austenitnykh svarnykh shvov sektora i udlinitel’nogo patrubka maketa vakuumnoi kamery termoyadernogo reaktora ITER (Automated Inspection of Austenitic Welded Joints in the Sector and Extension Nipple of a Prototype of the Vacuum Chamber of the ITER Thermonuclear Reactor Using the Avgur System), Moscow: Ekho+, 2000.
14. Newhouse, V.L., Bilgutay, N.M., Saniie, J., and Furgason, E.S., Flaw-to-Grain Echo Enhancement by Split-Spectrum Processing, Ultrasonics, 1982, pp. 59–68.10.1016/0041-624X(82)90003-8 ↗
15. Bilgutay, N.M., Newhouse, V.L., and Furgason, E.S., Flaw Visibility Enhancement by Split Spectrum Processing Technique, Ultrasonics Symp., 1981, pp. 878–883.10.1109/ULTSYM.1981.197750 ↗
16. Zhenqign, L., Dean, T., and Xiao, L.A., Phase Deviation Based Split-Spectrum Processing Algorithm for Ultrasonic Testing in Coarse Grained Materials, 15th World Conf. on Nondestructive Testing, Rome: 2000, p. 109.
17. Stepinski, T. and Ericsson, L., Signal Processing for Ultrasonic Testing of Material with Coarse Structure, 15th World Conf. on Nondestructive Testing, Rome: 2000, p. 497.
18. Gustafsson, M.G., Towards Adaptive Split Spectrum Processing, Ultrasonics Symp. Proc., 1995, vol. 1, pp. 729–732.
19. Karpur, P., Shankar, P.M., Rose, J.L., Newhouse, V.L., Split Spectrum Processing: Determination of the Available Bandwidth for Spectral Splitting, Ultrasonics, 1988, vol. 26, pp. 204–209.10.1016/0041-624X(88)90068-6 ↗
20. Acoustical Holography. Translated under the title Akusticheskaya golografiya, Prokhorov, V.G., Ed., Leningrad: Sudostroenie, 1975.
21. Marpl, S.L., Digital Spectrum Analysis. Translated under the title Tsifrovoi spektral’nyi analiz, Moscow: Mir, 1990.
22. Bazulin, E.G., Obtaining Scatterer Images with Longitudinal Superresolution from Multifrequency Digital Acoustical Holograms for Constructing AR-Models of Echo-Signal Spectra, Akust. Zh., 1993, vol. 39, no. 2, pp. 213–222.
23. Vasilenko, G.I. and Taratorin, A.M., Vosstanovlenie izobrazhenii (Reconstruction of Images), Moscow: Radio i Svyaz’, 1986.
24. Badalyan, V.G., Bazulin, E.G., Vopilkin, A.Kh., Grebennikov, D.V., and Tikhonov, D.S., Application of Superresolution Techniques to Expert Testing of Welded Joints in Pipelines of Nuclear Power Plants, Defektoskopiya, 2000, no. 1, pp. 58–65 [Rus. J. of Nondestructive Testing (Engl. Transl.), 2000, vol. 36, no. 1, p. 45].10.1007/BF02759393 ↗