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8
Issue
vol 63 / August, 2020
Article

DOI 10.17586/0021-3454-2018-61-12-1060-1066

UDC 620.179.16

ULTRASONIC INSPECTION OF METAL STRUCTURES USING PHASED ELECTROMAGNETIC-ACOUSTIC ANTENNA ARRAY

D. N. Bazylev
ITMO University, Saint Petersburg, 197101, Russian Federation; postgraduate


V. A. Romanovich
JSC "Diakont“, Department of System Design; Head of the Department


S. N. Somov
ITMO University;


A. A. Pyrkin
ITMO University, Saint Petersburg, 197101, Russian Federation; Professor, Dean


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Abstract. The task of pipeline diagnosing with the use of a phased antenna array (FAA) on an electromag-netic-acoustic converter (EMAC) is considered. A new algorithm for phased EMAC arrays is proposed; the algorithm provides improved accuracy characteristics and a faster scanning of a test object than the classical diagnostic method with FAA. The efficiency and performance of the developed scanning algorithm is studied experimentally with the help of the EMAC-FAA prototype and a test sample. Comparison of the new algorithm with the classical one on the base of the experimental results demonstrates that the proposed scanning solution allows to reduce the effect of crosstalk significantly and to increase the signal-to-noise ratio in the distributions of the echo signal amplitudes.
Keywords: phased antenna array, ultrasonic diagnostics, non-destructive testing, electromagnetic- acoustic converter

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