A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
Automated ultrasonic scanning and imaging system for application at civil structures
Ultrasonic testing can be used to inspect the inner structure of concrete elements at one-sided access. Especially imaging methods like the SAFT reconstruction (Synthetic Aperture Focusing Technique) are able to provide detailed three-dimensional representations of the concrete volume. Inner objects such as built-in parts, design elements, and defects can be detected and localised. For comprehensive examination of concrete structures automated measurement and imaging systems are a necessity. This contribution presents an integrated ultrasonic measurement and imaging system built specifically for this purpose, and shows results obtained with different transducer configurations. The system covers the complete acquisition and evaluation process of ultrasonic measurements on concrete structures. It consists of a multi-channel ultrasonic instrument, a three axes, automated mechanical scanner with 1.0 m x 0.8 m scan area, and an integrated SAFT reconstruction imaging software that converts the measurements into two-dimensional and three-dimensional images. For optimised adaptation to different applications, various transducers can be used including longitudinal water coupled transducers and dry-coupled shear transducers. Highlight is a 48-element/16-channel array transducer which can be electronically switched to increase the measurement speed by a factor of 10 to a minimum of 12 min/m2. Special three-dimensional sliced SAFT images are provided directly after the measurement. The system can universally be used for precision laboratory work as well as field applications. The systems capabilities are demonstrated with measurement results obtained at different test specimens. Based on two-dimensional and three-dimensional measurement results at point-like and extended targets, a number of measurement topics will be discussed including imaging possibilities, direct and indirect target detection, structural noise, and scan speed.
Automated ultrasonic scanning and imaging system for application at civil structures
Ultrasonic testing can be used to inspect the inner structure of concrete elements at one-sided access. Especially imaging methods like the SAFT reconstruction (Synthetic Aperture Focusing Technique) are able to provide detailed three-dimensional representations of the concrete volume. Inner objects such as built-in parts, design elements, and defects can be detected and localised. For comprehensive examination of concrete structures automated measurement and imaging systems are a necessity. This contribution presents an integrated ultrasonic measurement and imaging system built specifically for this purpose, and shows results obtained with different transducer configurations. The system covers the complete acquisition and evaluation process of ultrasonic measurements on concrete structures. It consists of a multi-channel ultrasonic instrument, a three axes, automated mechanical scanner with 1.0 m x 0.8 m scan area, and an integrated SAFT reconstruction imaging software that converts the measurements into two-dimensional and three-dimensional images. For optimised adaptation to different applications, various transducers can be used including longitudinal water coupled transducers and dry-coupled shear transducers. Highlight is a 48-element/16-channel array transducer which can be electronically switched to increase the measurement speed by a factor of 10 to a minimum of 12 min/m2. Special three-dimensional sliced SAFT images are provided directly after the measurement. The system can universally be used for precision laboratory work as well as field applications. The systems capabilities are demonstrated with measurement results obtained at different test specimens. Based on two-dimensional and three-dimensional measurement results at point-like and extended targets, a number of measurement topics will be discussed including imaging possibilities, direct and indirect target detection, structural noise, and scan speed.
Automated ultrasonic scanning and imaging system for application at civil structures
Automatisiertes Ultraschallabtastungs- und -abbildungssystem zur Anwendung an Bauwerken
Schickert, Martin (author) / Hillger, Wolfgang (author)
2010
10 Seiten, 9 Bilder, 7 Quellen
(nicht paginiert)
Conference paper
Storage medium
English
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