Wide band underwater acoustic transducer for stacked 2-2 piezoelectric composite material tube

ABSTRACT

A kind of high frequency wideband underwater acoustic transducer is developed, this transducer is formed by 2-2 type piezoelectric composite tube which is composed of double ring stacked along the axial direction. Through the radial cutting piezoelectric ceramic ring, filled with epoxy resin, samples polished, coated electrode and a series of process, the piezoelectric composite ring is prepared, then, the ring with the same outer diameter and different wall thickness is stacked in the axial direction. A double ring stack piezoelectric composite sensor is prepared, after pouring waterproof permeable layer, the transducer is made. Underwater performance test results show that the resonant frequency of transducer is 410 kHz, the maximum transmit voltage response is 150 dB, the -3dB bandwidth reaches 60 kHz, The bandwidth of the transducer is expanded by the method of composite and dual mode coupling.

KEYWORDS:

• Underwater acoustic transducer
• piezoelectric composite
• stacked circular ring
• wide band

Funding

The paper is supported by fund projects:

1)	Project of National Natural Science Foundation of China (614710470; 61771060; 61671068);
2)	Key project of Beijing Natural Science Foundation (B) (KZ201411232037)

The authors would like to acknowledge Li chao's work in the project research, he has paid a lot of hard work in the project research.