Spiral acoustic wave transmitting transducer containing vibration transmission rod

Abstract

The invention provides a spiral acoustic wave transmitting transducer containing a vibration transmission rod. The transducer comprises the vibration transmission rod arranged in a metal shell, piezoelectric ceramic stacks and metal mass blocks. The vibration transmission rod is arranged at the center of the metal shell, the upper end and the lower end of the vibration transmission rod are fixedlyconnected with the metal shell, a plurality of groups of piezoelectric ceramic stacks are uniformly distributed on the periphery of the vibration transmission rod, the metal mass blocks are arrangedat the peripheries of the piezoelectric ceramic stacks in a sleeving mode, each piezoelectric ceramic stack comprises a plurality of piezoelectric ceramic sheets and electrode sheets, the piezoelectric ceramic stacks are formed by staggered pressing of the piezoelectric ceramic sheets and the electrode sheets, and the two ends of each piezoelectric ceramic stack are provided with the correspondingpiezoelectric ceramic sheets. According to the spiral acoustic wave transmitting transducer containing the vibration transmission rod, the driving mode is simple, the phase directivity linearity is high, the phase characteristic does not change along with the height, the resonance frequency is relatively low, and the spiral acoustic wave transmitting transducer can be used for underwater acousticspiral acoustic wave navigation and underwater acoustic communication.

Description

Technical field [0001] The invention belongs to the field of underwater acoustic transducers, and in particular relates to a spiral acoustic wave emission transducer containing a vibration transmission rod. Background technique [0002] Sound waves are the only energy carrier known to humans that can be transmitted over long distances in sea water. Underwater navigation and positioning often use sound waves as the medium for carrying information. The underwater acoustic transducer, as a device that generates sound waves underwater, needs to be improved according to the needs of the times. [0003] In recent years, the rapid development of small-sized underwater vehicles has put forward the need for miniaturization and simplification of underwater navigation equipment. The American Benjamin Dzikowicz proposed a new underwater acoustic navigation technology based on the VOR technology in radio navigation. The phase directivity of the spiral sound wave realizes the navigation functi...

AI Technical Summary

Problems solved by technology

Although these helical acoustic wave transducers can emit sound waves with phase directivity, the linearity of the phase directivity of these transducers is often not good, and there is a problem that the phase directivity varies with height, which adds additional to the navigation. The error of some transducers is too complicated to meet the needs of actual spiral acoustic navigation. How to realize the emission of spiral acoustic waves with high phase directivity, phase characteristics that do not change with height, and simple driving has become a concern of people. The problem

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