Abstract
A novel method called dynamic focusing immersed ultrasonic testing (DFIUT) is proposed which utilizes an annular phased array ultrasonic transducer (APAUT) and one of the distinguished advantages is dynamic focusing. The proposed DFIUT is aimed at solving the focus deviation problem in the detection of large targets. The design methodology of APAUT and implementation of DFIUT method are presented in this paper. Furthermore, an annular phased array immersed ultrasonic testing (APAIUT) system is also set up. An experiment over the large molybdenum target using the DFIUT is conducted to verify the effectiveness of the proposed method.
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