Abstract
ABSTRACTA 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.
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