A Phased Array System is based around a
specialized ultrasonic transducer that contains many individual elements that
can be pulsed separately in a programmed pattern. An array transducer contains a number of
separate elements in a single housing, and phasing refers to how those elements
are sequentially pulsed. Benefits of Phased Array over conventional UT:
steering, commonly referred to sectorial scanning, can be used for mapping
components at appropriate angles.
ability to test welds with multiple angles from a single probe greatly
increases the probability of detection of anomalies.
focusing permits optimizing the beam shape and size at the expected defect