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A deep-water beacon search and positioning method suitable for single hydrophone

A single hydrophone, search and positioning technology, applied in the field of deep water beacon search and positioning, can solve the problems of small search area and low search efficiency, and achieve the effects of wide search area, simple system implementation and high efficiency

Active Publication Date: 2018-02-16
INST OF ACOUSTICS CHINESE ACAD OF SCI
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  • Abstract
  • Description
  • Claims
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Problems solved by technology

[0004] The purpose of the present invention is to overcome the defects of low search efficiency and small search area of ​​underwater beacon positioning technology in the prior art, thereby providing a single non-directional hydrophone to realize underwater beacon search and positioning under deep water conditions Methods

Method used

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  • A deep-water beacon search and positioning method suitable for single hydrophone
  • A deep-water beacon search and positioning method suitable for single hydrophone
  • A deep-water beacon search and positioning method suitable for single hydrophone

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Embodiment Construction

[0029] The present invention will be further described now in conjunction with accompanying drawing.

[0030] Those skilled in the art know that the pulse interval of the transmitted signal of the beacon is fixed, but in the navigating measurement, the pulse interval of the transmitted signal received between two receiving points will change, and this variation can reflect the received signal. Changes in position between points and beacons. According to this principle, the underwater beacon search and positioning method of the present invention utilizes the characteristics of the periodic signal transmitted by the beacon, by receiving the movement of the hydrophone, and using the signal time difference received between different receiving points to realize the target position solution.

[0031] The method of the present invention will be described in detail below in conjunction with the accompanying drawings.

[0032] like figure 1 As shown, the point M in the figure represe...

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Abstract

The invention relates to a deepwater beacon searching and positioning method suitable for a single hydrophone, which employs a single-element hydrophone to receive signals emitted by an underwater beacon, and comprises: in a period when a receiving point moves from A1 to A2, calculating an acoustic propagation distance in a period of the pulse separation variable quantity of beacon echo signals; in a period when a receiving point moves from A1 to A3, calculating an acoustic propagation distance in a period of the pulse separation variable quantity of beacon echo signals; and calculating the position of the underwater beacon.

Description

technical field [0001] The invention relates to an underwater beacon search and positioning technology, in particular to a deep water beacon search and positioning method suitable for a single hydrophone. Background technique [0002] In recent years, with the increasing scale of civil aviation in the world, the frequency of air accidents of civil aviation aircraft has been increasing. In order to investigate the cause of the air crash, it is an extremely critical task to search and salvage the "black box" that records important navigation data and voice information after the air crash. After the plane crashed at sea, the underwater acoustic beacon configured by the "black box" will automatically turn on when it encounters water, and continuously transmit pulse signals at fixed intervals. vocalize. How to use the beacon signal to quickly search and locate the "black box" within the validity period is an important part of the search and rescue mission. [0003] In order to...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01S5/22
Inventor 刘佳许枫杨娟安旭东
Owner INST OF ACOUSTICS CHINESE ACAD OF SCI
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