A Low Frequency Composite Rod Coupled Cavity Transducer for Deep Water

Abstract

The invention relates to a low-frequency composite rod coupled cavity transducer for deep water, comprising: a rigid cylinder, a rear mass block, a wire, a rear transition mass block, a piezoelectric ceramic stack, a radiation head, a prestressed screw, a compliance tube, a Mholtz tube and seal; wherein, the rigid cylinder is the shell of the transducer; the radiation head is located at the bottom of the transducer, and the gap between the radiation head and the rigid cylinder is sealed by an O-ring; the rear transition mass and the rear mass are located On the top of the transducer, the rear mass is set on the outside of the rear transition mass. The two have the same center of circle and are rigidly connected. The rear mass is rigidly connected to the rigid cylinder; the piezoelectric ceramic stack is installed on the rear transition through a prestressed screw. Between the mass block and the radiation head, it is connected to the outside of the rigid cylinder through wires, and the outer surface of the piezoelectric ceramic stack is also provided with a watertight layer; there are multiple through holes on the rear mass block, and each of the multiple through holes is equipped with a The Helmholtz tube that penetrates the liquid inside and outside the rigid cylinder; the watertight treatment between the prestressed screw and the radiation head.

Description

technical field [0001] The invention relates to the fields of underwater acoustic communication, underwater acoustic propagation, ocean surveying, etc., in particular, the invention relates to a low-frequency composite rod coupled cavity transducer for deep water. Background technique [0002] The 21st century is the century of the ocean. The underwater acoustic transducer is an important means of understanding the ocean, and it is widely used in the fields of underwater acoustic communication, detection, and deep-water ocean research. At present, major marine resource countries attach unprecedented importance to marine resources and marine territories, and deep-sea development technology has become a hot spot, which requires underwater acoustic transducers to be able to work in deep water conditions. This puts forward higher requirements on the performance of underwater acoustic transducers. [0003] The underwater acoustic transducers in the prior art include pressure-com...

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to overcome the defect that the composite rod transducer in the prior art is prone to sound pressure cancellation, so as to provide a low-frequency composite rod coupling cavity that can improve the low-frequency emission voltage response and improve the bandwidth, and is suitable for working in deep water transducer

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