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An ultra-short baseline five-element receiving array and its underwater acoustic positioning method

An ultra-short baseline, underwater acoustic positioning technology, used in positioning, radio wave measurement systems, measurement devices, etc., can solve problems such as poor stability and effectiveness, and achieve the effect of ensuring effectiveness and improving effectiveness and reliability.

Active Publication Date: 2017-01-18
HARBIN ENG UNIV
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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 receiving matrix in order to solve the problem that the current matrix has poor stability and effectiveness in measuring the target azimuth. The purpose of the present invention is also to provide a hydroacoustic positioning method

Method used

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  • An ultra-short baseline five-element receiving array and its underwater acoustic positioning method
  • An ultra-short baseline five-element receiving array and its underwater acoustic positioning method
  • An ultra-short baseline five-element receiving array and its underwater acoustic positioning method

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Embodiment 1

[0023] Example 1: Combining figure 1 and figure 2 Illustrate this embodiment, the ultra-short baseline five-element receiving matrix described in this embodiment, it comprises 5 receiving elements and the watertight shell of cylindrical array; On the bottom surface of the shell, the five receiving primitives are evenly distributed along the circumferential direction with the center of the bottom surface as the center; any two non-adjacent receiving primitives among the five receiving primitives are connected to form a measurement baseline.

[0024] Ultra-short baseline five-element receiving array layout diagram: the receiving array elements are located on the bottom end surface of the cylindrical array watertight shell, a total of 5 receiving elements form a planar array, and the 5 receiving elements are evenly distributed in the On the same circle, the angle between adjacent receiving elements and the line connecting the center of the array is 72°.

Embodiment 2

[0025] Embodiment 2: This embodiment is a further limitation of the ultra-short baseline five-element receiving array described in Embodiment 1. The diameter of the circle formed by the ultra-short baseline five-element receiving array is 30cm .

Embodiment 3

[0026] Embodiment 3: This embodiment is a further limitation of the ultra-short baseline five-element receiving matrix described in Embodiment 1.

[0027] The five receiving units are all receiving units cut and formed on solid metal by high-precision laser cutting technology, and the five receiving units are potted and fixed in the watertight shell of the cylindrical matrix through insulating resin on the bottom surface.

[0028] This embodiment ensures high-precision assembly of five receiving primitives.

[0029] The 5 receiving primitives are numbered 1-5 sequentially in a clockwise direction, and the direction of the x-coordinate axis of the basic matrix coordinate system is parallel to the direction of the connecting line between No. 2 and No. 5 receiving primitives, but passes through the center of the basic matrix, and The direction of the y-coordinate axis of the coordinate system is a straight line passing through the No. 1 receiving primitive and the center of the ...

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Abstract

The invention relates to an ultra-short basic line five-element receiving array and a water sound locating method thereof. According to the ultra-short basic line five-element receiving array and the water sound locating method thereof, five receiving elements are arranged on the bottom surface in a barrel-shaped array watertight shell and are evenly distributed with the center of the bottom surface as the circle center in the circumferential direction. By selecting all combinations of any three receiving elements in the array, a target orientation value is obtained through the three elements in each combination, the obtained target orientation values of all the combinations are averaged to obtain an average value serving as an initial orientation value of a measured target, and the initial orientation value meets set calculation accuracy and serves as a final orientation value of the measured target. By means of the ultra-short basic line five-element receiving array, redundant equal-precision measurement base lines are obtained through the minimum number of the elements, target locating is re-inspected and resolved by means of the geometrical relationship among the five redundant equal-precision measurement base lines, so that the problem of phase ambiguity is resolved, effectiveness of redundant data judging is guaranteed, and effectiveness and reliability of target orientation calculation are enhanced.

Description

technical field [0001] The invention relates to an ultra-short baseline five-element receiving array and an underwater acoustic positioning method thereof. Background technique [0002] The ultra-short baseline is the easiest method to install and the most convenient to use in the underwater acoustic positioning technology. The initial ultra-short baseline positioning system is based on the estimation of the phase difference of the received signals. To avoid phase ambiguity, only a triangular formation or a quadrilateral cross formation with an aperture smaller than half the wavelength can be used, but the disadvantage is that the positioning accuracy is not high. Although the 8-element cross matrix can improve the accuracy through a large number of redundant primitive data, its effective equal-precision measurement baseline is not substantially different from the four-element cross, and the fluctuation of the target orientation estimation cannot be effectively judged. Con...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01S5/22
CPCG01S5/20
Inventor 孙大军郑翠娥张居成李昭张殿伦勇俊李想韩云峰王永恒
Owner HARBIN ENG UNIV
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