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A method and device for underwater target positioning and velocity measurement in an environment of unknown sound velocity

A technology for underwater targets and speed measuring devices, which is applied in the directions of measuring devices, sound wave re-radiation, and utilization of re-radiation, and can solve problems such as increased measurement errors

Active Publication Date: 2020-08-18
SOUTH CHINA UNIV OF TECH
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  • Description
  • Claims
  • Application Information

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Problems solved by technology

Although the direct method and the indirect method are simple in principle and convenient to operate, they both need to measure the sound velocity on a certain detection path when the target position is known, and in underwater target positioning, the target position is unknown And it is used for estimation; at the same time, the indirect method can only measure the average speed of sound in a certain sea area. For a seawater environment with uneven sound speed distribution, its measurement error will increase significantly

Method used

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  • A method and device for underwater target positioning and velocity measurement in an environment of unknown sound velocity
  • A method and device for underwater target positioning and velocity measurement in an environment of unknown sound velocity
  • A method and device for underwater target positioning and velocity measurement in an environment of unknown sound velocity

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Embodiment

[0091] Such as figure 1Shown is a schematic diagram of the connection and combination of various modules in an underwater target positioning and speed measuring device for an environment of unknown sound velocity. Output display module 106 and power module 107 . The operation module is connected with the processing module and the power module; the processing module is connected with the conversion module, the output display module and the power module; the conversion module is connected with the transmitting module, the receiving module, the output display module and the power module; The transmitting module is connected with the receiving module, the output display module and the power supply module; the receiving module is connected with the output display module and the power supply module; the output display module is connected with the power supply module.

[0092] Such as figure 2 Shown is a schematic diagram of the connection and combination of the components of each...

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Abstract

The invention discloses positioning and velocity measuring method and device for an underwater target in an unknow sound velocity environment. The positioning and velocity measuring method specifically includes: (1) placing transceiving duplexing array elements and the underwater target, and emitting a detect signal; (2) by the aid of the array elements, receiving and detecting echoes reflected back after reaching the target; (3) seeking real-time velocity speed of a detecting path; (4) seeking coordinates of the target in various dimensions, and integrating the coordinates to obtain a real-time three-dimensional coordinate of the target; (5) measuring velocity of the target according to doppler shift. Compared with an existing underwater sound positioning technology in which inaccurate sound velocity measurement results to larger positioning error, the positioning and velocity measuring method and device have the advantages that a theoretically feasible real-time sound velocity measuring method is provided by an algorithm on the basis of angle characteristic relations between the array elements and the target, the sound velocity in the target detecting path can be determined accurately in real time, and great significance to improvement of positioning accuracy of the underwater sound positioning technology is realized.

Description

technical field [0001] The invention relates to the field of underwater target positioning and speed measurement, in particular to an underwater target positioning and speed measurement method and device for unknown sound velocity environment. Background technique [0002] The underwater acoustic positioning system is a typical sonar system, which can be used for precise positioning, navigation, detection and identification of targets in a specific underwater area. According to the length of the receiving array baseline, the underwater acoustic positioning system can be divided into long baseline positioning system, short baseline positioning system and ultra-short baseline positioning system. The ultra-short baseline underwater acoustic positioning system is a positioning method based on signal phase difference estimation, which requires the distance between receivers to be less than half of the signal wavelength, and the size of the array is very small, generally only on t...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01S15/06G01S15/58
CPCG01S15/06G01S15/588
Inventor 宁更新姜伸接
Owner SOUTH CHINA UNIV OF TECH
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