Papers by Keyword: Synthetic Aperture Focusing Technique

Abstract: Quality of the components in the mechanical engineering is of the utmost importance. Most of quality control procedures can be provided by advanced quality assurance methods that enable visualization of inner structure of a component within all of the occurring defects. This paper suggests an innovative post-processing technique for Full-Matrix ultrasonic imaging with Matrix phased arrays in the case of immersion testing. Evaluation of the reliability was performed by simulation via CIVA software as well as by experimental testing of a real component with given defects. The obtained results of the research demonstrated high sensitivity and accuracy of the suggested technique.

Abstract: The algorithms based on Synthetic Aperture Focusing Technique are aimed at the determination of the imageries of the flaws in controlled objects. Ultrasonic imaging of complex-shaped objects requires specific algorithms which are able to take into account the complicated character of ultrasonic waves propagation. In this article, we suggested the novel frequency-domain algorithm for ultrasonic imaging of complex-shaped objects. This algorithm is based on Phase –shift migration theory and Stolt transform. The evaluation of suggested technique was done by the application of raw ultrasonic data which was obtained by using computer simulations. Derived results show that proposed algorithm is able to make accurate and precise imaging of flaws in complex-shaped objects.