Preparatory Notes for ASNT NDT Level III Examination - Ultrasonic Testing, UT

5.4: Automated Scanning
Ultrasonic scanning systems are used for automated data acquisition and
imaging. They typically integrate a ultrasonic instrumentation, a scanning
bridge, and computer controls. The signal strength and/or the time-of-flight of
the signal is measured for every point in the scan plan. The value of the data
is plotted using colors or shades of gray to produce detailed images of the
surface or internal features of a component. Systems are usually capable of
displaying the data in A-, B- and C-scan modes simultaneously. With any
ultrasonic scanning system there are two factors to consider:
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how to generate and receive the ultrasound.
how to scan the transducer(s) with respect to the part being inspected.