10.14489/td.2019.01.pp.004-015

2019, 01 January

DOI: 10.14489/td.2019.01.pp.004-015

Danilov V. N.
MODELS OF CALCULATION ECHO SIGNAL, REGISTERED BY THE ANGLE BEAM PROBE WITH RECTANGULAR PIEZOPLATE ON A SAMPLE СО-3
(pp. 4-15)

Abstract. In approximation of geometrical acoustics features of reflection of ultrasonic waves from a concave cylindrical surface three models of different complexity for calculation echo signal, registered by the angle beam probe with rectangular piezoplate on a sample СО-3 are developed. Model № 1 takes into account only one beam, irradiated and registered by the centre piezoplate, model № 2 takes into account beams, irradiated and registered by the same small elements piezoplate in the basic plane, and model №3 – beams, irradiated the small elements forming a surface piezoplate, and registered by all its surface. Calculations echo signal with use of these models which are compared to experimental values are carried out. It is shown, that the best concurrence of theoretical and experimental results is achieved for calculation model № 3 – by most complex of considered. Thus absence of the account of pulse character of real signals limits its opportunities. It is established, that position of the angle beam probe at registration of a maximum echo signal may not correspond to a presence of the centre of a sample on geometrical axis of the angle beam probe that is especially appreciable for the big angles of probe and is shown in known feature of increase x-value the angle beam probe for such angels.

Keywords: angle beam probe, model, shear wave, angle of probe, rectangular piezoplate, sample СО-3, concave cylindrical surface, surface of the control, acoustic axis, probe index.

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V. N. Danilov (JSC“RPA “CNIITMASH, Moscow, Russia) E-mail: Данный адрес e-mail защищен от спам-ботов, Вам необходимо включить Javascript для его просмотра.

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