Dual-frequency large-size piezoelectric composite spherical transducer and its preparation method

Abstract

The invention relates to a double-frequency large-size piezoelectric composite spherical transducer and a preparation method thereof. The dual-frequency large-size piezoelectric composite spherical transducer includes a spherical shell of piezoelectric composite material; the spherical shell of piezoelectric composite material includes a plurality of piezoelectric material columns, and a polymer filled between each piezoelectric material column ; The outer surface of the piezoelectric composite spherical shell is pasted with a matching layer. The preparation method includes: cutting the piezoelectric ceramic sheet on the positive surface, filling the flexible polymer, cutting the ceramic substrate on the opposite side, bending the mold, pouring the hard polymer, demolding, fixing to the positioning tool, grinding or cutting, covering the electrode, splicing spherical shell. The invention can prepare a large-size (diameter greater than 200mm) spherical transducer, which can work at both low frequency (below 10kHz) and high frequency (above 100kHz), and can effectively compensate for the current spherical transducer Insufficient low frequency and high frequency can not work.

Description

technical field [0001] The invention belongs to the technical field of underwater acoustic transducers, in particular to a dual-frequency large-size piezoelectric composite spherical transducer and a preparation method thereof. Background technique [0002] A transducer is a device for energy conversion, a device that converts one form of energy into another. Since sound waves are the only carrier that humans have mastered so far that can transmit information and energy over a long distance in the vast sea, most of the current underwater detection, communication, navigation, and mapping rely on underwater acoustic transducers. At present, the commonly used underwater acoustic transducers are mainly piezoelectric transducers, and the piezoelectric element (transducer element) is its core component, which directly determines the performance of the transducer. [0003] Spherical piezoelectric transducers generally use piezoelectric ceramic spherical shells as their piezoelectr...

AI Technical Summary

Problems solved by technology

[0004] In view of the above problems, the present invention proposes a dual-frequency large-size piezoelectric composite spherical transducer and its preparation method, which can prepare a large-size spherical transducer, and the transducer can work at low frequencies (below 10kHz) , and can work at high frequency, which can effectively make up for the lack of current spherical transducers that cannot work at low and high frequencies

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