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A deep-water composite structural acoustic array and sound transmission method based on the array

A composite structure and acoustic technology, which is applied in the field of deep-water composite structure acoustic arrays, can solve the problems of poor hydrostatic pressure resistance of acoustic arrays, poor reliability and anti-collision performance of waterproof and sound-permeable rubber layers, and expand engineering applications. range, the effect of improving electrical insulation properties and shielding performance, improving service life and reliability

Inactive Publication Date: 2018-02-16
INST OF ACOUSTICS CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But the shortcomings are also obvious. The reliability and anti-collision performance of the waterproof and sound-permeable rubber layer are poor, and the hydrostatic pressure resistance of the acoustic matrix is ​​poor. Generally, it can only work in shallow water areas of tens of meters.

Method used

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  • A deep-water composite structural acoustic array and sound transmission method based on the array
  • A deep-water composite structural acoustic array and sound transmission method based on the array
  • A deep-water composite structural acoustic array and sound transmission method based on the array

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Embodiment 1

[0034] The upper shell and the lower shell form an axisymmetric cylindrical shell. The bottom surface of the inner cavity of the axisymmetric cylindrical shell is provided with a three-layer composite structure of front radiation plate 2-shock isolation and decoupling layer 4-lower shell 5. The three-layer composite structure As an acoustic sound-permeable window, the unit 1 is fixed in the front radiation plate 2 of the acoustic sound-permeable window to realize a sound-permeable strategy different from the prior art.

Embodiment 2

[0036] The pressure balance window 8 and the filling liquid 7 are used, so that the water pressure outside the matrix is ​​transmitted to the filling liquid inside through the rubber structure of the pressure balance window 8, and the pressure inside and outside the acoustic matrix is ​​kept in balance by utilizing the incompressibility of the filling liquid 7. The ability to withstand hydrostatic pressure of the acoustic array is greatly improved, making it possible for the acoustic array to work in a deep water environment, and expanding the engineering application range of the array, so the following embodiments are provided.

[0037] The present invention provides an acoustic array of deep water composite structure, the acoustic array includes a lower shell 5, an upper shell 6, a shock-isolation and decoupling layer 4, a front radiation plate 2, a basic element 1, a prestressed screw 3, a pressure balance Window 8 and filling liquid 7, the lower shell 5 has a thin-walled me...

Embodiment 3

[0043] Such as figure 1 As shown, the lower shell 5 and the upper shell 6 are processed into an axisymmetric cylindrical shell made of titanium alloy material, and the open ends of the two cylindrical shells are butted to form a cavity for accommodating the element 1. The lower surface of the lower shell 5 (That is, the bottom surface of the inner cavity of the axisymmetric cylindrical shell) should be processed into a thinner wall thickness, such as 5mm thickness; an O-ring is installed between the two shells to ensure watertightness, and 20 M10 titanium alloy screws are axially tightened to form a hermetic seal lumen structure. The front radiant plate 2 is processed into a 10mm thick disc shape with titanium alloy material. The upper surface is processed with 2mm wide and 3mm deep grooves. 96 square bosses are formed between the grooves. The center of the bosses is processed with an internal thread hole. The specific thickness and diameter of the front radiating plate 2, th...

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Abstract

The present invention provides a deep-water composite structural acoustic array and a sound transmission method based on the array. The acoustic array includes: an axisymmetric cylindrical shell, the axisymmetric shell is composed of an upper shell 6 and a lower shell 5 The shock-isolation and decoupling layer 4 is arranged on the bottom surface of the inner cavity of the axisymmetric cylindrical shell; the front radiation plate 2 is located on the upper layer of the shock-isolation and decoupling layer 4, and is fixedly connected with the element 1; wherein, the element The top of 1 is at a certain distance from the upper surface of the axisymmetric cylindrical shell; the bottom surface of the axisymmetric cylindrical shell is a metal surface. The advantage of the present invention is that, under the premise of ensuring the basic performance of the acoustic matrix, the reliability and service life of the acoustic matrix can be greatly improved, the transmission power capacity of the matrix can be improved, and the hydrostatic pressure resistance of the matrix can be improved, so that The base array can work in deep water environment. The acoustic matrix designed by the invention has great application value in engineering practice.

Description

technical field [0001] The invention belongs to the field of acoustic sensors, in particular, the invention relates to a deep-water composite structural acoustic matrix. Background technique [0002] Autonomous underwater vehicles are marine vehicles vigorously developed by countries all over the world, and have great application value in the fields of marine protection and marine resource development. Navigation is one of the main technical challenges faced by the application of underwater vehicles. Navigation capability is an important requirement for effective work and safe recovery of underwater vehicles. [0003] The Doppler Velocimeter is a navigation device that uses the Doppler effect to measure the speed of an underwater vehicle. Its basic principle is to transmit an acoustic beam to the seabed at a certain inclination, receive the echo signal from the seabed, and measure the transmitted signal and the received signal. The frequency offset of , so as to solve the s...

Claims

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Application Information

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IPC IPC(8): H04R1/44
Inventor 刘永平张运强莫喜平
Owner INST OF ACOUSTICS CHINESE ACAD OF SCI
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