Ultrasonic testing (UT) provided a solution to avoid radiation and to obtain instant results. Initially, ultrasonic testing was performed manually by an experienced and skilled inspector who would move an ultrasonic probe in a meander pattern along the weld, searching for potential weld imperfections. This inspection strategy was further improved by mechanised or automated UT (AUT) systems. The first systems were quite bulky and heavy (Figure 1) due to the size of the manipulator, and also due to the number of ultrasonic probes required for a complete coverage of the inspection volume using the zonal discrimination concept (ZDC).
Ultrasonic testing (UT) provided a solution to avoid radiation and to obtain instant results. Initially, ultrasonic testing was performed manually by an experienced and skilled inspector who would move an ultrasonic probe in a meander pattern along the weld, searching for potential weld imperfections. This inspection strategy was further improved by mechanised or automated UT (AUT) systems. The first systems were quite bulky and heavy (Figure 1) due to the size of the manipulator, and also due to the number of ultrasonic probes required for a complete coverage of the inspection volume using the zonal discrimination concept (ZDC).
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