Print Email Facebook Twitter Recent developments in guided wave travel time tomography Title Recent developments in guided wave travel time tomography Author van Zon, A.T. Volker, A.W.F. Publication year 2014 Abstract The concept of predictive maintenance using permanent sensors that monitor the integrity of an installation is an interesting addition to the current method of periodic inspections. Guided wave tomography had been developed to create a map of the wall thickness using the travel times of guided waves. It can be used for both monitoring and for inspection of pipe-segments that are difficult to access, for instance at the location of pipe-supports. An important outcome of the tomography is the minimum remaining wall thickness, as this is critical in the scheduling of a replacement of the pipe-segment. In order to improve the sizing accuracy we have improved the tomography scheme. A number of major improvements have been realized allowing to extend the application envelope to pipes with a larger wall thickness and to larger distances between the transducer rings. Simulation results indicate that the sizing accuracy has improved and that is now possible to have a spacing of 8 meter between the source-ring and the receiver-ring. Additionally a reduction of the number of sensors required might be possible as well. © 2014 AIP Publishing LLC. Subject Fluid Mechanics Chemistry & EnergeticsPID - Process & Instrument DevelopmentTS - Technical SciencesPhysicsIndustrial InnovationCorrosion MonitoringDispersionInversionGuided electromagnetic wave propagationNondestructive examinationSensorsUltrasonic testingGuided wave tomographiesPeriodic inspectionPredictive maintenanceSizing accuracyTransducer ringsTravel time tomography To reference this document use: http://resolver.tudelft.nl/uuid:61411a90-456b-43fd-a64b-a26191d3f38d TNO identifier 513409 Publisher American Institute of Physics ISBN 9780735412118 ISSN 1551-7616 Source 40th Annual Review of Progress in Quantitative Nondestructive Evaluation, QNDE 2013, Incorporating the 10th International Conference on Barkhausen and Micro-Magnetics, ICBM 2013, 21-26 July 2013, Baltimore, MD, USA, 1581 33, 201-208 Document type conference paper Files To receive the publication files, please send an e-mail request to TNO Library.