Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Single-hydrophone sound source passive positioning method in deep sea environment

A deep-sea environment, passive positioning technology, applied in the field of sonar, underwater acoustic detection, can solve the problem of a large number of hydrophones, active sound and so on

Active Publication Date: 2018-05-29
NORTHWESTERN POLYTECHNICAL UNIV
View PDF15 Cites 15 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In order to avoid the deficiencies of the prior art, the present invention proposes a single hydrophone sound source passive positioning method in the deep sea environment, which solves the problems that the existing sound source positioning method in the deep sea environment requires a large number of hydrophones and requires active sounding.

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Single-hydrophone sound source passive positioning method in deep sea environment
  • Single-hydrophone sound source passive positioning method in deep sea environment
  • Single-hydrophone sound source passive positioning method in deep sea environment

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0041] Now in conjunction with embodiment, accompanying drawing, the present invention will be further described:

[0042] Step 1: Deploy a single hydrophone in the sea in the form of a submersible buoy or a buoy, and obtain the depth information of the hydrophone through a depth sensor.

[0043] The depth z refers to the distance between the hydrophone and the sea level. The depth of the ocean is H. In the deep sea environment, the depth of the sound source is d, and the horizontal distance between the sound source and the hydrophone is r. When dB , T SB , T BS , T SBS .

[0044] Step 2: For the received broadband signal, by performing autocorrelation processing on the signal, six relative time delays between the arrival signals of the four paths can be obtained without prior information of the signal.

[0045] The received signal is set as s(t), and the autocorrelation of the signal can be expressed as

[0046]

[0047] where T is the signal length, ( ) * denotes the...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention relates to a single-hydrophone sound source passive positioning method in a deep sea environment. A wide-band signal received by a single hydrophone is used. A large-aperture array composed of a number of hydrophones is not needed. Signal synchronization between hydrophones is not needed. Sound source positioning in the deep sea environment can be realized without exposing the position in a passive receiving mode. According to the invention, six indiscernible relative time delays are arranged in ascending order to form a relative time delay vector for sound source positioning; anerror vector is acquired by subtracting the measured time delay vector from a predicted time delay vector, and the 1-norm and the reciprocal of the error vector is acquired for sound source positioning; the method is used in the South China Sea at a sea depth of 2680 meters in summer; a sound source is a linear chirp signal with a bandwidth of 2.9kHz to 3.1kHz; the sound source distance is 13.8 kilometers, and the depth is 49 meters; the positioning of the sound source is completed; the relative distance error is 2.9%; and the relative depth error is 22.5%.

Description

technical field [0001] The invention belongs to the fields of underwater acoustic detection, sonar technology and the like, and relates to a sound source localization method in water, in particular to a single hydrophone sound source passive localization method in a deep sea environment. Background technique [0002] The underwater sound source localization method usually reconstructs the sound source position information by extracting the information contained in the signal received by a single hydrophone (sensor) or multiple hydrophone arrays arranged in a certain way. The more common method is the matching field processing method, but this method requires a large aperture and the number of array elements to collect enough information to locate the sound source, and this type of method has a large amount of calculation and is greatly affected by environmental mismatch. , not suitable for sound source localization in deep sea environment. In the deep sea environment, there...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Applications(China)
IPC IPC(8): G01S5/22
CPCG01S5/22
Inventor 杨益新刘文旭
Owner NORTHWESTERN POLYTECHNICAL UNIV
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com