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Method and system for tracking and positioning underwater target

A technology for tracking and positioning, underwater targets, applied in the field of communication, can solve the problems of synchronization error, multi-path interference, etc., to achieve the effect of improving positioning accuracy, expanding non-ambiguous distance, and accurate synchronization and timing

Inactive Publication Date: 2009-10-28
SOUTH CHINA UNIV OF TECH
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Problems solved by technology

[0010] Aiming at the defects and deficiencies in the existing short-baseline underwater acoustic positioning system, the primary purpose of the present invention is to provide an underwater target tracking and positioning method, which solves the existing problems by adopting blue-green laser synchronous time synchronization and underwater acoustic frequency hopping mechanism respectively. There are synchronization errors and multipath interference problems that exist in short-baseline hydroacoustic positioning systems

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  • Method and system for tracking and positioning underwater target
  • Method and system for tracking and positioning underwater target
  • Method and system for tracking and positioning underwater target

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Embodiment Construction

[0037] The present invention will be further described in detail below in conjunction with the embodiments and the accompanying drawings, but the embodiments of the present invention are not limited thereto.

[0038] Such as figure 1 As shown, the system of the present invention is mainly composed of an underwater acoustic array and an underwater transponder. figure 2 Shown is the internal structure module diagram of the underwater acoustic matrix, which is represented by figure 2 It can be seen that the underwater acoustic array includes a pedestal 11, a hydrophone array 12, a blue-green laser emitting and receiving integrated rotatable device 13, a water pressure sensor 14, an attitude detection device 15, a central processing unit 16, and a display device 17. The hydrophone array 12 is connected to the hydrophone array processing unit 18 through the preamplifier 19, and the central processing unit 16 is respectively connected to the hydrophone array processing unit 18, t...

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Abstract

The invention relates to an underwater target tracking and positioning method, which comprises the following steps that: a central processing unit transmits a starting instruction and required positioning data rate information to a blue and green laser transmitting and receiving integral rotatable device, scans an underwater responder, and transmits a laser signal containing the data rate information to the underwater responder; the underwater responder reflects the laser signal according to the prior path, and a transducer is opened; after the reflected laser signal is received, the transducer transmits a synchronous timing signal to the central processing unit, and the central processing unit begins timing; the underwater responder transmits a periodical frequency hopping pulse signal of corresponding data rate to a hydrophorce according to the data rate information; the hydrophorce transmits a direct signal to the central processing unit; and the central processing unit calculates distance information, corrects the coordinate and calculates the coordinate of the underwater responder. The invention also relates to an underwater target tracking and positioning system. The invention adopts a blue and green laser synchronous time synchronization mechanism and a hydroacoustic frequency hopping mechanism to solve the problems of synchronous error and multi-path interference in the prior short-baseline hydroacoustic positioning system respectively.

Description

technical field [0001] The present invention relates to the communication field, and more specifically, relates to an underwater target tracking and positioning method and system. Background technique [0002] The underwater acoustic positioning system mainly refers to the tracking and positioning of objects in local areas or the navigation system of ships. According to the distance between primitives (receivers or interrogators), hydroacoustic positioning systems can be divided into long baseline systems, short baseline systems and ultra-short baseline systems. [0003] The Chinese invention patent application with the publication number CN101246215A and the publication date of August 20, 2008 is based on a long baseline positioning system, which consists of a differential GPS reference station, an underwater transceiver, a GPS buoy, and a ship-based control center. The time difference between the signal of the transceiver and each GPS buoy (at least 4) is used to calculat...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01S15/66G01S7/52G01S15/58
Inventor 韦岗曾令创宁更新
Owner SOUTH CHINA UNIV OF TECH
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