This work focuses on the design, prototyping and testing of a new millimeter-size 3D printed acoustic sensor based on a Polyvinylidene Fluoride (PVDF) film. The piezoelectric PVDF has been widely used for sensors development in many applications due their high sensitivity and low cost. The aim of this work is to design an acoustic sensor that collects the acoustic wave and convey the most part of it as a force on the piezoelectric PVDF film in order to increase the sensitivity of the microphone. The work presents a detailed analytical model describing the mechanical behavior of the system. Through a metaheuristic optimization algorithm, we found the optimal geometric parameters of the system that maximize the acoustic force on the piezoelectric film. Analytical results show that the proposed solution exhibits a good value of sensitivity in the frequency range 10-10000 Hz. The proposed acoustic sensor was manufactured through 3D printing in ABS material and the tests focused on investigating the sensitivity of the system at different frequencies.
Design, prototyping and validation of a new PVDF acoustic sensor / Sorrentino, A.; Ricci, Y.; Castagnetti, D.; Larcher, L.. - (2019), pp. 71-72. (Intervento presentato al convegno 30th International Conference on Adaptive Structures and Technologies, ICAST 2019 tenutosi a Concordia University, can nel 2019).
Design, prototyping and validation of a new PVDF acoustic sensor
Sorrentino A.;Ricci Y.;Castagnetti D.;Larcher L.
2019
Abstract
This work focuses on the design, prototyping and testing of a new millimeter-size 3D printed acoustic sensor based on a Polyvinylidene Fluoride (PVDF) film. The piezoelectric PVDF has been widely used for sensors development in many applications due their high sensitivity and low cost. The aim of this work is to design an acoustic sensor that collects the acoustic wave and convey the most part of it as a force on the piezoelectric PVDF film in order to increase the sensitivity of the microphone. The work presents a detailed analytical model describing the mechanical behavior of the system. Through a metaheuristic optimization algorithm, we found the optimal geometric parameters of the system that maximize the acoustic force on the piezoelectric film. Analytical results show that the proposed solution exhibits a good value of sensitivity in the frequency range 10-10000 Hz. The proposed acoustic sensor was manufactured through 3D printing in ABS material and the tests focused on investigating the sensitivity of the system at different frequencies.
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