... investigated. The results show that the natural focusing inspection technique can sufficiently inspect an entire pipe with FAT. 21 01 2005 20 04 2005 pipes inspection ultrasonic focusing ultrasonic materials testing ultrasonic guided wave natural focusing frequency and angle tuning...

... 2005 pipes ultrasonic materials testing insulation coatings ultrasonic focusing Focusing Pipes Elbows Ultrasonics Guided Waves Excellent progress has been made over the last few years on the subject of long-range guided wave inspection in pipe. See for example ( 1 2 3...

... do not spread out like bulk wave and waves in a plate. In order to use the focusing technique for practical pipe inspection, however, more quantitative detailed and theoretical studies are needed. In this study, ultrasonic focusing is studied with a special calculation technique for guided waves...