Folding cover plate broadband underwater transducer

Abstract

The invention provides a folding cover plate broadband underwater transducer comprising a piezoceramic wafer stack, an upper-end metal cover plate, a lower-end metal cover plate and a prestressed screw rod, wherein the piezoceramic wafer stack is formed by alternately stacking piezoceramic rings and thin metal pieces, the polarization direction of the piezoceramic rings is along a thickness direction, an electrode leading wire is welded on the thin metal pieces, and the upper-end metal cover plate forms a folding shape by an inner cover plate and an outer cover plate. The folding cover plate broadband underwater transducer adopts a single-end excitation principle, a work bandwidth exceeds an octave, a non-operating passive material part is designed into a folding type to reduce dimension;and with small volume and compact structure, the folding cover plate broadband underwater transducer is suitable for array requirements. The folding cover plate broadband underwater transducer can beapplied to underwater communication, detection, target location, track, and the like and is an important part for sonar application.

Description

technical field [0001] The present invention relates to underwater acoustic transducers. Background technique [0002] Sound waves are carriers of information and energy underwater. Underwater acoustic equipment relies on sound waves to transmit information. It uses sound waves as an information carrier to realize the detection, positioning, identification and communication of underwater targets. So far, underwater acoustic equipment is still the most effective for underwater information collection and information processing. equipment. The underwater acoustic transducer is used to transmit and receive sound waves underwater and is an important part of underwater acoustic equipment. When in the transmitting state, the electromagnetic vibration energy is converted into mechanical vibration energy, thereby pushing the water medium to vibrate and radiate sound energy. The "transducer" in the general sense refers to this type of transmitter; when in the receiving state, its T...

AI Technical Summary

Problems solved by technology

However, using the nesting technology of piezoelectric ceramic rings with different diameters, the resonant frequency of the manufactured longitudinal vibration transducer is about 1.7kHz, and the effective length is only 0.3m, which greatly reduces the size of the longitudinal vibration transducer (Yu Hongpei, Tang Yizheng , Lin Jiawang. A measure to reduce the size of low-frequency longitudinal vibration transducers. Acoustics and Electronics Engineering. 1999 No. 4: 17-20)

Images