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28 April 2023 Ultrasonic piezoelectric transducer design with concave surface
Chaegyu Lim, Youngsu Cha
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Proceedings Volume 12483, Active and Passive Smart Structures and Integrated Systems XVII; 124830G (2023) https://doi.org/10.1117/12.2657014
Event: SPIE Smart Structures + Nondestructive Evaluation, 2023, Long Beach, California, United States
Abstract
This paper introduces an ultrasonic piezoelectric transducer consisted of a concave shaped piezoelectric film and a support with an air cavity for vibration. The high flexibility and sensitivity of the transducer are guaranteed by utilization of Polyvinylidene fluoride (PVDF), and these are important in designing transducers of good acoustic performance. Ultrasound pressure results of the transducer are measured from frequency sweep inputs. From the results, we observe that the concave case generates several resonant peaks within a specific frequency range. Additionally, the sound pressure change of the transducers with different radii of curvature is investigated. The experimental results demonstrate that radius of curvature contributes to the sound pressure magnitude significantly.
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Chaegyu Lim and Youngsu Cha "Ultrasonic piezoelectric transducer design with concave surface", Proc. SPIE 12483, Active and Passive Smart Structures and Integrated Systems XVII, 124830G (28 April 2023); https://doi.org/10.1117/12.2657014
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KEYWORDS
Ultrasound transducers
Ultrasonics
Piezoelectric materials
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