Characterization of mode selective actuator and sensor systems for Lamb wave excitation

Daniel Schmidt; Christoph Heinze; Wolfgang Hillger; Artur Szewieczek; Michael Sinapius; Peter Wierach

doi:10.1117/12.914768

18 April 2012 Characterization of mode selective actuator and sensor systems for Lamb wave excitation

Daniel Schmidt, Christoph Heinze, Wolfgang Hillger, Artur Szewieczek, Michael Sinapius, Peter Wierach

Proceedings Volume 8348, Health Monitoring of Structural and Biological Systems 2012; 83480R (2012) https://doi.org/10.1117/12.914768
Event: SPIE Smart Structures and Materials + Nondestructive Evaluation and Health Monitoring, 2012, San Diego, California, United States

Abstract

Structural Health Monitoring (SHM) based on Lamb waves, a type of ultrasonic guided waves, is a promising technique for in-service inspection of composite structures. This study presents the development of mode selective actuator and sensor systems based on interdigital transducer (IDT) design. Various parameters such as wavelengths, number and apodization of electrodes as well as eigenfrequencies of the transducer are characterized. Therefore, an analytical model based on the theory of surface acoustic wave (SAW) filters is investigated in order to evaluate the acoustic response of the transducer. Furthermore, experimental tests on composite plates are performed.

Citation Download Citation

Daniel Schmidt, Christoph Heinze, Wolfgang Hillger, Artur Szewieczek, Michael Sinapius, and Peter Wierach "Characterization of mode selective actuator and sensor systems for Lamb wave excitation", Proc. SPIE 8348, Health Monitoring of Structural and Biological Systems 2012, 83480R (18 April 2012); https://doi.org/10.1117/12.914768

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