engleski

Electromechanical and acoustical characterization of piezoceramic elements and ultrasound transducers

Usage of a piezoceramic actuators and ultrasound transducers in modern applications requires very high efficiency and stability in real operating conditions. Whether if it’s used in medicine as a diagnostic, therapeutic or invasive device, in industry for non- destructive testing, for cleaning overall or for other purposes, usage of an ultrasound element should be optimized to obtain as higher radiation power as possible or better resolution by optimizing the pulse shape and its duration. To enhance and optimize utilization of an ultrasound transreceiver a proper characterization is needed. Mostly used methods for characterization (frequency sweeping, amplitude sweeping) are described in EN standards (50324) [1]. In this paper an overview of mostly used and some recently published methods is given. Algorithms for laboratory equipment are implemented and setups are adjusted for each considered method. Laboratory measurements are created, and results are presented. Results of electromechanical characterization for different types of bulk piezoceramic materials and transducers are analyzed and discussed. An introduction to novel automated method for determining properties of a piezoceramic elements and ultrasound transducers driven by continuous signal at resonant frequency which depends on the excitation level is also shown and discussed.

electromechanical and acoustical characterization, standardized methods, optimization of impedance matching, impulse excitation, characterization at resonant frequency

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