Reverse Time Migration: A Seismic Imaging Technique Applied to Synthetic Ultrasonic Data
Ultrasonic echo testing is a more and more frequently used technique in civil engineering to investigate concrete building elements, to measure thickness as well as to locate and characterise built-in components or inhomogeneities. Currently the Synthetic Aperture Focusing Technique (SAFT), which is...
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| Format: | Article |
| Language: | English |
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Wiley
2012-01-01
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| Series: | International Journal of Geophysics |
| Online Access: | http://dx.doi.org/10.1155/2012/128465 |
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| _version_ | 1832568115613925376 |
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| author | Sabine Müller Ernst Niederleithinger Thomas Bohlen |
| author_facet | Sabine Müller Ernst Niederleithinger Thomas Bohlen |
| author_sort | Sabine Müller |
| collection | DOAJ |
| description | Ultrasonic echo testing is a more and more frequently used technique in civil engineering to investigate concrete building elements, to measure thickness as well as to locate and characterise built-in components or inhomogeneities. Currently the Synthetic Aperture Focusing Technique (SAFT), which is closely related to Kirchhoff migration, is used in most cases for imaging. However, this method is known to have difficulties to image steeply dipping interfaces as well as lower boundaries of tubes, voids or similar objects. We have transferred a processing technique from geophysics, the Reverse Time Migration (RTM) method, to improve the imaging of complicated geometries. By using the information from wide angle reflections as well as from multiple events there are fewer limitations compared to SAFT. As a drawback the required computing power is significantly higher compared to the techniques currently used. Synthetic experiments have been performed on polyamide and concrete specimens to show the improvements compared to SAFT. We have been able to image vertical interfaces of step-like structures as well as the lower boundaries of circular objects. It has been shown that RTM is a step forward for ultrasonic testing in civil engineering. |
| format | Article |
| id | doaj-art-efd399d9f4d44dc4a343f95533fd7243 |
| institution | Kabale University |
| issn | 1687-885X 1687-8868 |
| language | English |
| publishDate | 2012-01-01 |
| publisher | Wiley |
| record_format | Article |
| series | International Journal of Geophysics |
| spelling | doaj-art-efd399d9f4d44dc4a343f95533fd72432025-02-03T00:59:45ZengWileyInternational Journal of Geophysics1687-885X1687-88682012-01-01201210.1155/2012/128465128465Reverse Time Migration: A Seismic Imaging Technique Applied to Synthetic Ultrasonic DataSabine Müller0Ernst Niederleithinger1Thomas Bohlen2Division 8.2 of Non-destructive Damage Assessment and Environmental Measurement Methods, BAM Federal Institute for Materials Research and Testing, Unter den Eichen 87, 12205 Berlin, GermanyDivision 8.2 of Non-destructive Damage Assessment and Environmental Measurement Methods, BAM Federal Institute for Materials Research and Testing, Unter den Eichen 87, 12205 Berlin, GermanyGeophysical Institute, KIT Karlsruhe Institute of Technology, Hertzstr. 16, 76187 Karlsruhe, GermanyUltrasonic echo testing is a more and more frequently used technique in civil engineering to investigate concrete building elements, to measure thickness as well as to locate and characterise built-in components or inhomogeneities. Currently the Synthetic Aperture Focusing Technique (SAFT), which is closely related to Kirchhoff migration, is used in most cases for imaging. However, this method is known to have difficulties to image steeply dipping interfaces as well as lower boundaries of tubes, voids or similar objects. We have transferred a processing technique from geophysics, the Reverse Time Migration (RTM) method, to improve the imaging of complicated geometries. By using the information from wide angle reflections as well as from multiple events there are fewer limitations compared to SAFT. As a drawback the required computing power is significantly higher compared to the techniques currently used. Synthetic experiments have been performed on polyamide and concrete specimens to show the improvements compared to SAFT. We have been able to image vertical interfaces of step-like structures as well as the lower boundaries of circular objects. It has been shown that RTM is a step forward for ultrasonic testing in civil engineering.http://dx.doi.org/10.1155/2012/128465 |
| spellingShingle | Sabine Müller Ernst Niederleithinger Thomas Bohlen Reverse Time Migration: A Seismic Imaging Technique Applied to Synthetic Ultrasonic Data International Journal of Geophysics |
| title | Reverse Time Migration: A Seismic Imaging Technique Applied to Synthetic Ultrasonic Data |
| title_full | Reverse Time Migration: A Seismic Imaging Technique Applied to Synthetic Ultrasonic Data |
| title_fullStr | Reverse Time Migration: A Seismic Imaging Technique Applied to Synthetic Ultrasonic Data |
| title_full_unstemmed | Reverse Time Migration: A Seismic Imaging Technique Applied to Synthetic Ultrasonic Data |
| title_short | Reverse Time Migration: A Seismic Imaging Technique Applied to Synthetic Ultrasonic Data |
| title_sort | reverse time migration a seismic imaging technique applied to synthetic ultrasonic data |
| url | http://dx.doi.org/10.1155/2012/128465 |
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