High-frequency broadband underwater acoustic transducer and manufacturing method thereof

Abstract

The invention belongs to and relates to a high-frequency broadband underwater acoustic transducer device, in particular to a high-frequency broadband underwater acoustic transducer and a manufacturingmethod thereof. The underwater acoustic transducer comprises a matching layer, a wafer backing layer and an acoustic transmission coating layer which are sequentially installed in the shell in parallel from top to bottom, wherein the wafer is of a 1-3-2 type piezoelectric ceramic composite material structure and comprises a ceramic substrate, a plurality of ceramic elements grow on the ceramic substrate, and every two ceramic elements are connected through a high-molecular polymer; an upper electrode is arranged above the ceramic element; a lower electrode is arranged below the ceramic substrate, a watertight cable or a watertight connector is led out from the lower electrode through the backing layer and the shell, and received or transmitted electric signals are input or output. According to the technical requirements of working frequency and bandwidth characteristics, the wafer and the matching layer are optimally designed, and when the method is applied to underwater speed measurement sonar and detection sonar, broadband signal processing can be carried out to increase the information amount, improve the detection precision, increase the detection range and the like.

Description

technical field [0001] This patent relates to a high-frequency broadband underwater acoustic transducer device, in particular to an underwater acoustic transducer device used in underwater speed measurement and depth measurement and other detection, specifically a high-frequency broadband underwater acoustic transducer and its Production method. Background technique [0002] With the continuous development of underwater acoustic countermeasures and underwater detection technology, the demand for high-frequency broadband transducers is increasing. Usually, the bandwidth of high-frequency transducers is relatively narrow. With the development of underwater detection accuracy and underwater communication, high-frequency transducers are required to have larger bandwidths to meet the requirements of broadband signal processing at the back end and provide more amount of information. [0003] The 1-3-2 piezoelectric composite transducer has the advantages of wide frequency band, ...

AI Technical Summary

Problems solved by technology

[0004] Based on the existing problems in the prior art, the present invention considers that the 1-3-2 type piezoelectric composite transducer with a matching layer can further widen the bandwidth of the transducer, and can effectively overcome the 1-3 piezoelectric composite transducer with a matching layer. Type piezoelectric composite transducer electrodes have the disadvantages of complex preparation, unstable structure and easy deformation, etc., which meet the technical requirements of high performance and high reliability for underwater acoustic applications

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