Bernd Frankenstein

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Guided elastic waves in the frequency range of a few hundred kHz, generated and detected by appropriate transducer arrays, are used to monitor the structural integrity of pipes by comparing their actual state with a predefined reference state. For these purposes, theoretical, numerical, and experimental results are combined to study guided wave propagation(More)
Traditional vibration-based monitoring techniques provide general information about the investigated structure by identifying and analyzing specific resonance modes. Using low frequencies, they are limited to the identification of large defects, and in the precision of their localisation as well. The paper shows that vibration monitoring of essential(More)
New materials and lightweight structures call for new concepts of reliability assurance and maintenance. The progress in microelectronics and micro-electromechanical systems (MEMS) allows development of highly integrated smart systems in large quantities at low costs that combine signal generation, data pre-processing and wireless communication accompanied(More)
In the framework of the EU project SAFE PIPES (Safety Assessment and Lifetime Management of Industrial Piping Systems) elastic waves in the frequency range between 70 and 350 kHz, generated and detected by appropriate transducer arrays , are used to monitor the structural integrity of pipes by comparing their actual state with a predefined reference state.(More)
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