An Integrated System for Live Characterization and Adaptive Compensation of Ultrasonic Transducers
N.D.J. Barker (TU Delft - Electrical Engineering, Mathematics and Computer Science)
T. Evers (TU Delft - Electrical Engineering, Mathematics and Computer Science)
A.J. van Genderen – Mentor (TU Delft - Electrical Engineering, Mathematics and Computer Science)
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Abstract
Ultrasonic transducers are commonly used in a variety of medical, industrial, and consumer devices, converting electrical energy into high-frequency sound waves. These devices find extensive applications in fields such as medical imaging, non-destructive testing, distance measurement, and cleaning processes. However, these transducers suffer from a narrow operating frequency range caused by a steep frequency response curve with a prominent resonance peak. Existing passive compensation methods using filters are limited due to the individual characteristics of transducers and their susceptibility to process variations, making generic compensation filters impractical. Additionally, the frequency response of transducers changes over time, input power, and environmental conditions, further complicating compensation efforts.
The objective of this project is to overcome these challenges by creating an integrated solution that can provide an ultrasonic transducer system with a consistent frequency response despite external disturbances. The proposed system will incorporate non-linear dynamics characterization and compensation, which are currently lacking in integrated solutions. By accurately characterizing the transducer’s non-linear behavior and compensating for it, the system will overcome the drawbacks associated with passive compensation.
The proposed integrated system holds promising implications for various applications, including medical imaging, material testing, and industrial processes. By mitigating the limitations associated with the narrow operating frequency range of ceramic piezoelectric transducers, this research project contributes to the advancement of ultrasonic technology and its broader impact on diverse industries.