Design and analysis of a low-sidelobe underwater acoustic transducer
Low sidelobe broadband transducers can improve detection accuracy and anti-interference ability of sonar systems.Here,1-3 type piezoelectric composite material piezoelectric phase non-uniform distribution technology and matching layer multi-mode coupled technology were comprehensively adopted to design a low sidelobe and broadband high-frequency underwater acoustic transducer.Its theoretical calculation model and simulation model were established,by combining numerical calculation and finite element simulation,variation laws of frequency and piezoelectric phase volume percentage as well as variation laws of sidelobe level and ring radius were analyzed.Design parameters were optimally chosen,the preparation was finished and the transducer was measured.It was shown that the measured results are basically consistent with simulation results;tests verify the design idea being able to realize low sidelobe broadband transducer;the actually measured sidelobe level of the transducer is-23.9 dB,it is 6.3 dB lower than the maximum sidelobe level of conventional piston array,the transducer's center frequency is 300 kHz,and its transmission voltage response bandwidth(-3 dB)reaches 150 kHz.
low sidelobebroadbandnon-uniform distribution1-3 type piezoelectric compositetransducer
万方数据
维普
