The calibration of an ultrasonic antenna array installed on a wedge
Source abstract
Abstract
A method that is proposed for calibrating an antenna array that is installed on a wedge provides refinement of the coordinates of the centers of piezoelectric elements. Precise knowledge of the coordinates will make it possible to obtain images in which reflections from reflectors will coincide with their actual positions with an accuracy no worse than a half wavelength. The calibration principle involves the minimization of the objective function that describes the difference between the antenna-array-measured echo signals from a 2-mm-diameter side drilled hole (SDH) at a depth of 12 mm and the calculated echo signals from the same hole. The algorithm operation was tested for echo signals calculated in the CIVA program. The calibration results for several antenna arrays on wedges and images of an SDH are presented, which were obtained using the method for digital antenna-array focusing (DAAF) for various acoustic systems.
Source: openalex_inverted_index · Quality: baseline
Research context
OpenAlex topics: Ultrasonics and Acoustic Wave Propagation · Acoustic Wave Resonator Technologies · Acoustic Wave Phenomena Research
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
References (16)
Show source-provided references
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. 404–423.
2. Ermolov, I.N., Teoriya i praktika ul’trazvukovogo kontrolya (Theory and Practice of Ultrasonic Testing), Moscow: Mashinostroenie, 1981.
3. Bazulin, A.E., Bazulin, E.G., Vopilkin, A.Kh., and Tikhonov, D.S., An automated system for measuring the parameters of ultrasonic piezoelectric transducers, V Mire Nerazrush. Kontr., 2010, no. 1(47), pp. 35–41.
4. http://www.olympus-ims.com/ru/omniscan-mx2/
5. Bazulin, E.G., Determining the flaw type from images obtained by the C-SAFT method with account for trans-formations of wave types upon reflections of ultrasonic pulses from the irregular boundaries of a test object, Russ. J. Nondestr. Test., 2011, no. 1, pp. 30–44.
6. Bazulin, E.G. and Kokolev, S.A., Increasing the signal-to-noise ratio in ultrasonic testing of repair welds using the technology of thinned antenna arrays, Russ. J. Nondestr. Test., 2013, no. 5, pp. 283–293.
7. Golubev, A.S., Reflection of plane waves from a cylindrical flaw, Akust. Zh., 1961, vol. VII, no. 2, pp. 174–180.
8. 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. 446–458.
9. Samarskii, A.A. and Gulin, A.V., Chislennye metody: Ucheb. posobie dlya vuzov (Numerical Methods: A Manual for Higher School), Moscow: Nauka. Gl. red. fiz-mat. lit., 1989.
10. Born, M. and Wolf, E., Principles of Optics, Oxford, 1968.
11. Ermolov, I.N., Diffraction of sound in the acoustic path of a pulse flaw detector, Akust. Zh., 1960, vol. VI, no. 2, pp. 198–204.
12. Danilov, V.N., On the directivity characteristic of an angle transducer in the reception mode, Russ. J. Nondestr. Test., 2011, no. 4, pp. 247–258.
13. Gitis, M.B. and Khimunin, A.S., On diffraction effects in ultrasonic measurements, Akust. Zh., 1968, vol. XIV, no. 4, pp. 489–513.
14. Gol’denberg, L.M., Matyushkin, B.D., and Polyak, M.N., Tsifrovaya obrabotka signalov: Spravochnik (Digital Processing of Signals: A Handbook), Moscow: Radio i svyaz’, 1985.
15. Kassandrova O.N. and Lebedev V.V., Obrabotka rezul’tatov nablyudenii (Processing of Observational Data), Moscow: Nauka, 1970.
16. http://www.extende.com/civa-2