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23 April 2020 Resonances of surface-bonded piezoelectric wafer active transducers and their effects on the S0 pitch-catch signal
H. Huang
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Proceedings Volume 11379, Sensors and Smart Structures Technologies for Civil, Mechanical, and Aerospace Systems 2020; 113790I (2020) https://doi.org/10.1117/12.2559312
Event: SPIE Smart Structures + Nondestructive Evaluation, 2020, Online Only
Abstract
Surface-bonded piezoelectric wafer active transducers (PWaTs) are frequently used for ultrasound generation and sensing in Structural Health Monitoring (SHM) applications. In this paper, the scattering parameters of an ultrasound pitch-catch system are analyzed to show that the surface-bonded PWaTs act like a resonator and their resonance could cause the fundamental symmetric (S0) mode pitch-catch signal to deviate from the applied excitation signal. A simulation model was implemented to reproduce the measurement results and to gain physical insights of the experimental observations. This study suggests that the excitation frequency should not overlap the resonance frequency in order to avoid the deviation of the S0 pitch-catch signal from the excitation signal.
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H. Huang "Resonances of surface-bonded piezoelectric wafer active transducers and their effects on the S0 pitch-catch signal", Proc. SPIE 11379, Sensors and Smart Structures Technologies for Civil, Mechanical, and Aerospace Systems 2020, 113790I (23 April 2020); https://doi.org/10.1117/12.2559312
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KEYWORDS
Actuators
Sensors
Structural health monitoring
Transducers
Wave propagation
Adhesives
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