10.14489/td.2020.08.pp.004-016

2020, 08 August

DOI: 10.14489/td.2020.08.pp.004-016

Danilov V. N.
ABOUT SOME FEATURES OF APPLICATION OF A TANDEM TECHNIQUE IN THE ULTRASONIC TESTING
(pp. 4-16)

Abstract. On the basis of received before the formula of an acoustic сhannel for the circuit of the ultrasonic control the tandem technique and a reflector as a side drilled hole carries out calculations echo signals for various base distances, depths of reflector and angles of probes. Influence on amplitude of a registered signal of a choice of position of a point of reflection on depth of the control is shown. It is established, that mutual replacement of positions of transmitting and receiving probes with identical parameters in a tandem technique practically has not an effect for amplitude of a registered signal. Influence on amplitude of a signal of distinction of angles of transmitting and receiving probes is shown. Comparison of the signals received at use of the circuit of the control on a tandem technique with reflection of a shear wave from a bottom surface and at use of the circuit of a path for separate angle probes with reflection of a wave only from a surface of defect has shown, that a choice of base distance between probess for the point of reflection which are taking place on small distance from a bottom surface, provides also an opportunity of detection of volumetric defects on significant distance from this surface.

Keywords: a tandem technique, formula of an acoustic сhannel, angle beam probe, bottom surface, side drilled hole, point of reflection, base distance.

+ - About the Authors Click to collapse

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.

+ - References Click to collapse

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