Selecting the Pitch of a Double Crystal Transducer in Ultrasonic Testing of Products Made of Complex Structured Materials with a Nonplanar Surface
- Авторы: Kartashev V.1, Kachanov V.1, Sokolov I.1, Fadin A.1, Timofeev D.1
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Учреждения:
- Moscow Power Engineering Institute
- Выпуск: Том 55, № 12 (2019)
- Страницы: 887-897
- Раздел: Acoustic Methods
- URL: https://journals.rcsi.science/1061-8309/article/view/182187
- DOI: https://doi.org/10.1134/S1061830919120040
- ID: 182187
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Аннотация
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.
Об авторах
V. Kartashev
Moscow Power Engineering Institute
Email: kachanovvk@mail.ru
Россия, Moscow, 111250
V. Kachanov
Moscow Power Engineering Institute
Автор, ответственный за переписку.
Email: kachanovvk@mail.ru
Россия, Moscow, 111250
I. Sokolov
Moscow Power Engineering Institute
Email: kachanovvk@mail.ru
Россия, Moscow, 111250
A. Fadin
Moscow Power Engineering Institute
Email: kachanovvk@mail.ru
Россия, Moscow, 111250
D. Timofeev
Moscow Power Engineering Institute
Email: kachanovvk@mail.ru
Россия, Moscow, 111250