An ultrasonic guided wave computed tomography (CT) technique has been developed to monitor degradation in pipeline. Degradation here refers to corrosion, erosion, or fatigue cracking. A sparse guided wave sensor array can be embedded on pipeline and baseline data sets can be compared with subsequent data sets to produce CT images of damage that occurs in the structure. The resulting CT images are capable of determining damage size, location, and severity. The technique can be used to detect and discriminate between multiple damaged regions in localized areas and can be applied to, for example, straight pipeline sections, elbows, and/or welds. Several CT algorithms have been developed that take advantage of different guided wave features for image construction. Selection of the proper CT algorithm has shown the ability to increase damage detection probability and decrease false defect calls.
An ultrasonic guided wave tomography approach for pipeline health monitoring
Eine Ultraschalltomographie mit geführten Wellen zur Überwachung des Zustands von Pipelines
2009
5 Seiten, 6 Bilder, 6 Quellen
(nicht paginiert)
Conference paper
Storage medium
English
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