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Selecting the Pitch of a Double Crystal Transducer in Ultrasonic Testing of Products Made of Complex Structured Materials with a Nonplanar Surface

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Abstract

It is noted that the ultrasonic testing of products made of complex structured materials is based, as a rule, on spatiotemporal signal processing, using ultrasonic antenna arrays to extract useful echo signal from pattern noise. If the product has a nonplanar surface, one should use a synthesized aperture antenna, which is a double crystal transducer (DC PET) moved along the product surface in steps of d. The dependence of the cross-correlation of pattern-noise instances on the distance between two DC PET positions was established and used to determine the optimum (maximizing the signal–to–pattern-noise ratio) DC PET movement step d, depending on transducer’s aperture size.

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Funding

The article was prepared during the implementation of the State Order of the Ministry of Education and Science of the Russian Federation in the field of science, project no. 11.9879.2017/8.9.

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Authors and Affiliations

  1. Moscow Power Engineering Institute, 111250, Moscow, Russia

    V. G. Kartashev, V. K. Kachanov, I. V. Sokolov, A. S. Fadin & D. V. Timofeev

Authors
  1. V. G. Kartashev
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  2. V. K. Kachanov
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  3. I. V. Sokolov
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  4. A. S. Fadin
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  5. D. V. Timofeev
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Corresponding author

Correspondence to V. K. Kachanov.

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Translated by V. Potapchouck

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Kartashev, V.G., Kachanov, V.K., Sokolov, I.V. et al. Selecting the Pitch of a Double Crystal Transducer in Ultrasonic Testing of Products Made of Complex Structured Materials with a Nonplanar Surface. Russ J Nondestruct Test 55, 887–897 (2019). https://doi.org/10.1134/S1061830919120040

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  • DOI: https://doi.org/10.1134/S1061830919120040

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