Development of underwater acoustic transducer using 1-3-2 piezoelectric composite

The flat transducer is composed of 1-3-2 piezoelectric composite and copper shell. The structure of transducer was determined according to design requirement and finite element analysis by ANSYS. The transducer was prepared by using a 25mmx25mmx4.8mm 1-3-2 composite chip, rigid foam backing, copper shell, polyurethane layer and acoaxial cable. The voltage response, source level, receiving voltage sensitivity and other performance were measured. The resonant frequency of transducer is 294kHz, the maximum transmitting voltage response is 159.6dB, 3dB bandwidth is 32kHz, source level is 208 dB, receiving voltage sensitivity of the transducer is -203 +/- 3dB in the frequency range of 50-250kHz frequency, the beam width of -3dB is 11 degrees in the directivity.