Design and Testing of the 20-40 kHz Broad-Band Piezoelectric Cylindrical Transducer

This paper presents a design scheme of piezoelectric cylindrical transducers which are widely used in the field of underwater acoustics measuring,with the finite element method applied to research on piezoelectric cylindrical transducers.The finite element model of a transducer is set up using the ANSYS software,in order to optimize the transducer structure,as well as analyze the vibration,conductance and radiation characteristics.An underwater cylindrical transducer with broad-band directivity was designed and fabricated on the basis of the composite excitation,breathing mode and the dipole mode of vibration.The results show that the bandwidth of transducers is 20-40 kHz,in which the ripple of the transmitting voltage response does not exceed ±5 dB,and the maximum of the transmitting voltage response is 142 dB.The transducer has good horizontal direction independent beam pattern directivity.