Title :
Two-dimensional electroacoustic model of transducer array based on 1-3 piezocomposite materials
Author :
Certon, Dominique ; Guyonvarch, Jerome ; Ferin, Guillaume ; Patat, Frederic
Author_Institution :
LUSSI, Francois Rabelais Univ., Tours
fDate :
12/1/2006 12:00:00 AM
Abstract :
An analytical model is presented to achieve simultaneous prediction of the elementary electroacoustic response and directivity pattern of a one-dimensional (1D) piezocomposite array. The theoretical approach was based on guided wave theory in a multilayered structure in which the 1-3 piezocomposite material is considered as a homogeneous piezoelectric plate. A matrix method was applied to simulate the displacement fields generated at the surface of the array when one element was excited with an electrical pulse. A test device was manufactured, then characterized through measurements of displacement performed with an interferometric laser probe when the array vibrated in air and in water. The experimental results are presented and compared with theory
Keywords :
acoustoelectric effects; acoustoelectric transducers; biomedical ultrasonics; composite materials; piezoelectric materials; ultrasonic transducer arrays; waveguide theory; 1-3 piezocomposite materials; 1D piezocomposite array; 2D electroacoustic model; directivity pattern; displacement field; electrical pulse excitation; elementary electroacoustic response; guided wave theory; homogeneous piezoelectric plate; interferometric laser probe; matrix method; medical ultrasound imaging; multilayered structure; transducer array; Analytical models; Displacement measurement; Laser excitation; Manufacturing; Optical materials; Optical pulse generation; Piezoelectric materials; Testing; Transducers; Vibration measurement;
Journal_Title :
Ultrasonics, Ferroelectrics, and Frequency Control, IEEE Transactions on
DOI :
10.1109/TUFFC.2006.195
