10.14489/td.2019.03.pp.022-033

2019, 03 March

DOI: 10.14489/td.2019.03.pp.022-033

Grebennikov D. V., Grebennikov V. V., Titov V. Yu.
PHASE ARRAY FLAW DETECTOR. RESOLVING POWER OF THE FLAW DETECTOR TYPE OMNISCAN
(pp. 22-33)

Abstract. Carry out an analysis of the types resolving power of flaw detector for a wedge probe. A review scientific papers on calculation resolving power, in which multidirectional reflectors in the form of cylindrical drill holes and direct transducers were used for experimental confirmation of calculations, were made. The resolving power of echo method of phase array flaw detector is measured experimentally in the main and additional planes for the near and far surface of the echo pulse. Reference samples were made to control the frontal resolving power in two planes with artificial reflectors of flat bottom holes that better imitate defects such as cracks and laminations. The comparison of experimental data with the calculated results is conducted in phase array flaw detector like Omniscan: in ray focusing function and without focusing function. The graphs of relationship amplitudes interference echo signals at position transducer axis between flat bottom reflectors to maximum amplitude echo signal from a single flat bottomed hole are plotted. The plots of dependence resolving power in the main plane on the depth a pair of holes are plotted. Experimental data are compared with the results of calculations.

Keywords: phase array flaw detecter, piezoelectric transducer, resolving power, FOCAL SPOT, flat-bottomed holes.

+ - About the Authors) Click to collapse

D. V. Grebennikov, V. V. Grebennikov (Limited Liability Company “Scientific and Technical Company EKONT” (LLC “STC EKONT”), Reutov, Russia) E-mail: Данный адрес e-mail защищен от спам-ботов, Вам необходимо включить Javascript для его просмотра.
V. Yu. Titov (Limited Liability Company “Scientific and Technical Company EKONT” (LLC “STC EKONT”), Reutov, Russia; Bauman Moscow State Technical University (National Research University of Technology) (BMSTU), 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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6. Grebennikov D. V., Grebennikov V. V., Titov V. Yu. (2013). The study of the acoustic path of an ultrasonic flaw detector with piezo transducers on phased arrays. ARD diagrams. Kontrol'. Diagnostika, (3), pp. 9-16. [in Russian language].

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