Eventos Anais de eventos
COBEM 2017
24th ABCM International Congress of Mechanical Engineering
Development and characterization of a 2D phased array ultrasonic transducer for underwater applications
Submission Author:
Estevão Patricio Rodrigues , SP
Co-Authors:
Estevão Patricio Rodrigues, Timoteo Francisco de Oliveira, Flávio Buiochi
Presenter: Estevão Patricio Rodrigues
doi://10.26678/ABCM.COBEM2017.COB17-2391
Abstract
A 2D phased array ultrasonic transducer can electronically deflect and focus acoustic beams in a 3-D space. These characteristics make it attractive for underwater applications such as sonar, to detect and identify reflective interfaces (e.g. objects, ocean floor, and shipwrecks). This paper presents the modeling, construction and characterization processes of a 2D phased array prototype, composed by sixteen 5-mm square elements of Pz37 piezoelectric ceramic with a frequency of 500kHz. A matching layer of alumina/epoxy composite is added to optimize the acoustic transmission. In order to optimize the pulse-echo response, three types of backing layers were tested: air, water, and tungsten/epoxy composite. The acoustic field measured was compared to the theoretical model of a plane piston impulse response, simulated in MATLAB.
Keywords
SONAR, underwater, Ultrasonic, 2D phased-array
