University of Cincinnati

Clampon as

Cincinnati Nde, Ltd.

Tecwel as

Geir Instanes

Peter B Nagy

Gunnar Andersen

Francesco Simonetti

Carson L Willey

Audun Oppedal Pedersen

Terje Lennart Lie

The disclosure relates to an ultrasound-based method for calculating wall thickness, or a change thereof, in points within a monitored area of a wall, said method being based on measurement results from a process in which acoustic, guided waves are transmitted from transmitting transducers, propagated in the wall, received by receiving transducers and then recorded. Each recorded signal is interpreted as carrying information about the wall thickness, or change thereof since a previous measurement, throughout a measured section comprising a two-dimensional area of the wall. The wall thickness, or change thereof, is at least in part calculated for each segment of the monitored area, wherein a segment is a subset of the monitored area contained in a distinct combination of the measured sections. The disclosure further relates to an apparatus for acoustic, guided-wave measurement or monitoring of wall thickness, or a change thereof.

Method and apparatus for calculation of wall thickness variations

Systems, methods and computer storage mediums accurately measure wall thickness in a region of interest included in complex curved structures. Embodiments of the present disclosure relate to generating a wall thickness loss distribution map of a region of interest that provides an accurate representation of wall thickness for the region of interest included in a complex curved structure. The wall thickness loss distribution map is generated from a two-dimensional model of the wall thickness loss distribution of the region of interest. The two-dimensional model is converted from a three-dimensional representation of the wall thickness loss distribution of the region of interest. The three-dimensional representation of the wall thickness is generated by ultrasonic waves generated by a transducer system that propagated through the region of interest.

Measuring wall thickness loss for a structure

A method and an apparatus for guided-wave tomographic measurement or monitoring of wall thicknesses of the walls of pipes and similar structures are disclosed. The method is characterized in that use is made of transducers () preferably positioned in at least two groups of a plurality of transducers ('-&#x2033;) arranged in a spaced apart pattern on the external surface of the structures, the transducers individually transmit ultrasound signal into the pipe wall, in that each ultrasound signal propagates within the pipe wallfrom the transmitting transducer and is received at one or several receiving transducers, and the received ultrasound signal is converted to an electrical signal by the receiving transducers and recorded by the transceiver (). Measurements are performed by using a further plurality of transducers () that are placed apart from the two groups of a plurality of transducers (&#x2032;-&#x2033;). There is also disclosed a method for guided-wave tomographic measurement or monitoring of wall thicknesses in the walls of pipes and similar structures producing a set of measurement data by using the apparatus.

Methods and apparatus for measurement or monitoring of wall thicknesses in the walls of pipes or similar structures

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Nesttun-Bergen, Norway

Geir Instanes