Development of Ultrasonic Transducers

• Grant number: 17/13094-4
• Support Opportunities: Regular Research Grants
• Start date: November 01, 2017
• End date: October 31, 2020
• Field of knowledge: Engineering - Electrical Engineering - Electrical, Magnetic and Electronic Measurements, Instrumentation
• Principal Investigator: Flávio Buiochi
• Grantee: Flávio Buiochi
• Host Institution: Escola Politécnica (EP). Universidade de São Paulo (USP). São Paulo , SP, Brazil

Abstract

This research project aims to develop ultrasonic transducers of the following types: piezocomposite for emission in air, capacitive for generating sound (in the audible range), multi-element for emission in water and solid (flexible linear array and two-dimensional rigid array. Models will be implemented to simulate the propagation of the acoustic beam of transducers in solid and liquid media for the detection of defects/objects within the investigated medium. For the validation of the transducer prototypes the following experimental measurements will be taken: bandwidth, pulse duration, directivity of the acoustic beam, electrical impedance, acoustic field, displacements (orthogonal to the radiating surface) using laser interferometer. Subsequently, acoustic fields will be measured, samples will be imaged and the results will be compared to those obtained by the models. (AU)

Scientific publications

(References retrieved automatically from Web of Science and SciELO through information on FAPESP grants and their corresponding numbers as mentioned in the publications by the authors)

FRANCO, EDIGUER E.; BARRERA, HELVER M.; FORMIGONI, PAULO O.; BUIOCHI, FLAVIO. Shear-wave corner retroreflector device for ultrasonic measurement of viscosity. ULTRASONICS, v. 117, DEC 2021. (17/13094-4)

BOECHAT, FLAVIO M. B.; RODRIGUES, ESTEVAO P.; DE OLIVEIRA, TIMOTEO F.; BUIOCHI, FLAVIO; TSUZUKI, MDG; JUNQUEIRA, F. Development of a PVDF needle-type hydrophone for measuring ultrasonic fields. 2018 13TH IEEE INTERNATIONAL CONFERENCE ON INDUSTRY APPLICATIONS (INDUSCON), v. N/A, p. 4-pg., 2018-01-01. (17/13094-4)

REYNA CARLOS, A. B.; FRANCO EDIGUER, E.; FLAVIO, BUIOCHI; COSTAFELIX, R; MACHADO, JC; ALVARENGA, AV. Electromechanical Model Applied to Piezoelectric Resonators. XXVI BRAZILIAN CONGRESS ON BIOMEDICAL ENGINEERING, CBEB 2018, VOL. 2, v. 70, n. 2, p. 7-pg., 2019-01-01. (17/13094-4)