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Ultra-short baseline five-element stereoscopic space array and underwater acoustic localization method

A three-dimensional space, ultra-short baseline technology, applied in positioning, radio wave measurement systems, measuring devices, etc., can solve problems such as poor stability and effectiveness, errors in positioning calculation results, etc., to ensure effectiveness, improve effectiveness and reliability sexual effect

Inactive Publication Date: 2016-12-07
OCEANOGRAPHIC INSTR RES INST SHANDONG ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to provide an ultra-short baseline five-element three-dimensional space matrix and its underwater acoustic positioning method to solve the problem that when the current sound source target is close to the plane of the positioning matrix, the error of the positioning calculation result in the vertical direction increases sharply. Problems leading to poor stability and validity of measurements

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  • Ultra-short baseline five-element stereoscopic space array and underwater acoustic localization method
  • Ultra-short baseline five-element stereoscopic space array and underwater acoustic localization method
  • Ultra-short baseline five-element stereoscopic space array and underwater acoustic localization method

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Embodiment 1

[0029] see Figure 1~2 , in an embodiment of the present invention, an ultra-short baseline five-element three-dimensional space array, including five underwater acoustic transducer elements and a cylindrical array shell with a spherical cap; the underwater acoustic transducer The 4 primitives in the primitives are located in a horizontal plane where the spherical cap and the cylinder meet, and the 4 primitives are arranged in a square shape and located at the 4 vertices; the fifth primitive is located in the center of the top of the spherical cap; Among the 4 primitives, the 2 diagonal primitives can form vertical positioning planes with the primitives located at the top of the spherical cap respectively, forming two vertical positioning datum reference system planes.

[0030] Schematic diagram of the array layout of the five-element three-dimensional space base array of the ultra-short baseline: the three-three combination of the five primitives of the base array constitutes...

Embodiment 2

[0032] This example is a further limitation of the ultra-short baseline five-element three-dimensional space matrix described in Embodiment 1. The diameter of the cylindrical surface formed by the ultra-short baseline five-element three-dimensional space matrix is ​​15 cm. The center frequency of the acoustic signal used can be adjusted appropriately, the lower the frequency, the diameter can be increased, and the higher the frequency, the diameter can be reduced.

Embodiment 3

[0034]This embodiment is a further limitation of the ultra-short baseline five-element three-dimensional space matrix described in Embodiment 1. The five underwater acoustic transducer elements are all made on solid metal using high-precision numerical control processing technology. The assembly base is cut and formed to realize the assembly of the transducer element; the five transducer elements are potted with insulating sound-permeable rubber, and fixed on the installed base of the processed array shell.

[0035] This embodiment ensures high-precision assembly of five primitives.

[0036] For 5 underwater acoustic transducer primitives, 4 of them in a horizontal plane are numbered 1-4 sequentially in a clockwise direction, and the remaining 1 is number 5. It is stipulated that the direction of the x-coordinate axis of the global coordinate system of the matrix is ​​the direction of a straight line extending from point 0 to the No. 1 primitive, the direction of the first-coo...

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Abstract

The invention discloses an ultra-short baseline five-element stereoscopic space array including five underwater acoustic energy transducer elements that are respectively arranged at the vertexes of a spatial pentahedron, four of the underwater acoustic energy transducer elements are arranged at the four vertexes in a horizontal plane to form a square layout, and two diagonal elements of the four elements in the same plane and the fifth element respectively form positioning planes in the vertical direction, and thereby two positioning reference planes in the vertical direction are formed. When the localization is carried out, an orthogonal coordinate system can be formed by using any three points of the horizontal plane, and also a horizontal orthogonal coordinate system can be formed by four points; and meanwhile, any two diagonal elements on the horizontal plane and the fifth element form positioning array planes in the vertical direction, different array planes are combined for positioning to obtain target directional values, and then by means of coordinate transformation, the positioning result of each local coordinate system is converted to a unified overall positioning coordinate system for data fusion to be the final directional value of the target to be measured.

Description

technical field [0001] The invention relates to the technical field of an ultra-short baseline underwater acoustic positioning method, in particular to an ultra-short baseline five-element three-dimensional space array and an underwater acoustic positioning method thereof. Background technique [0002] The ultra-short baseline underwater acoustic positioning method has a simple array structure and is easy to install and use. The general ultra-short baseline positioning system is based on the estimation of the received signal phase difference. The triangular array or quadrilateral cross array with an aperture smaller than half the wavelength can effectively avoid the phase ambiguity problem; the 8-element cross array extended on the basis of the quadrature cross array can improve the accuracy through a large number of redundant primitive data, But its effective equal-accuracy measurement baseline is actually the same as that of the four-element cross array, and the fluctuati...

Claims

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Application Information

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IPC IPC(8): G01S5/18
CPCG01S5/18
Inventor 王中秋崔天刚胡桐李春立成文王虹入
Owner OCEANOGRAPHIC INSTR RES INST SHANDONG ACAD OF SCI
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