Environmental Engineering Reference
In-Depth Information
Fig. 12.32
Free pipe.
Courtesy Schlumberger
An added refi nement to the standard ultrasonic “pulse-echo” imaging technique
is the generation and measurement of fl exural waveforms using focused compres-
sional waves and conventional amplitude detectors. Figure
12.30
shows the physical
arrangement of the rotation transducers.
Fig. 12.33
Combined
pulse-echo and fl exural
transducers. Courtesy
Schlumberger
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