A5037858299- Seismic Imaging and Inversion Techniques
- Geophysical Methods and Applications
- Seismic Waves and Analysis
- Ultrasonics and Acoustic Wave Propagation
- Drilling and Well Engineering
- Structural Health Monitoring Techniques
- Scientific Computing and Data Management
- Geotechnical Engineering and Soil Mechanics
- Force Microscopy Techniques and Applications
- Distributed and Parallel Computing Systems
- Scientific Measurement and Uncertainty Evaluation
- Electrostatic Discharge in Electronics
- Rock Mechanics and Modeling
- Cloud Computing and Resource Management
- Non-Destructive Testing Techniques
- Geotechnical Engineering and Underground Structures
- Grouting, Rheology, and Soil Mechanics
- Structural Response to Dynamic Loads
Federal Institute For Materials Research and Testing
2016-2024
Abstract The ultrasonic echo technique is widely used in non-destructive testing (NDT) of concrete objects for thickness measurements, geometry determinations and localization built-in components. To improve imaging complex structures, we transferred a seismic technique, the Reverse Time Migration (RTM), to NDT civil engineering. RTM, contrast conventionally synthetic aperture focusing (SAFT) algorithms, considers all wavefield types thus, can handle wave propagations any direction with no...
ABSTRACT Ultrasonic echo testing is widely used in non‐destructive civil engineering to investigate concrete structures, measure thickness, and locate characterise built‐in components or inhomogeneities. Currently, synthetic aperture focusing techniques are mostly for imaging. These algorithms highly developed but have some limitations. For example, it not possible image the lower boundary of like tendon ducts vertical reflectors. We adopted reverse time migration order improve imaging...
Abstract The ultrasonic echo technique is broadly applied in non‐destructive testing (NDT) of concrete structures involving tasks such as measuring thickness, determining geometry and locating built‐in elements. To address the challenge enhancing imaging for complex constructions, we adapted a seismic algorithm – reverse time migration (RTM) NDT civil engineering. Unlike traditionally synthetic aperture focusing (SAFT), RTM takes into account full wavefield including primary reflected...
ABSTRACT For decades, the low‐strain impact integrity testing using a hammer blow is well established as method of quality assurance for various pile types. However, this has its limitations. Our research and development focuses on improving excitation signal shaker system in contrast to standard method. Another approach increase amount sensors used during testing. The purpose identify direction wave propagation that gives advantages under difficult conditions, such piles below structures....
Abstract The ultrasonic echo technique is frequently used in non-destructive testing (NDT) of concrete structures for thickness measurements, geometry determinations as well localization built-in components. To improve imaging complex concrete, we transferred a geophysical technique, the reverse time migration (RTM), to NDT civil engineering. In contrast conventionally synthetic aperture focusing (SAFT) algorithms, RTM wavefield continuation method and uses full wave equation. Thus, can...
The “HPI Future SOC Lab” is a cooperation of the Hasso Plattner Institute (HPI) and industry partners. Its mission to enable promote exchange interaction between research community partners. HPI Lab provides researchers with free charge access complete infrastructure state art hard software. This includes components, which might be too expensive for an ordinary environment, such as servers up 64 cores 2 TB main memory. offerings address particularly from but not limited areas computer...
Modern geophysical methods might be either directly applied to concrete structures or integrated into existing testing schemes assist in quality assurance and inspections. This paper gives an overview on some ideas developments from the author's work: Vibrator technologies improve pile integrity testing. Ideas vertical seismic profiling used multichannel inspection Cross- downhole seismics check diameter of jet grouting columns Improving parallel for precise length measurement piles...
The ultrasonic echo technique is widely used in non-destructive testing for investigation and damage analysis of concrete constructions. To improve the imaging complicated structures concrete, we transferred a seismic migration technique, Reverse Time Migration (RTM), to testing. In preliminary study, tested 2D acoustic RTM algorithm on measured data acquired at foundation slab. Compared conventional synthetic aperture focusing (SAFT) algorithms reconstruction, our results showed significant...