Method for active classification and positioning of underwater targets based on reliable sound path

A technology of underwater target and positioning method, which is applied in the direction of sound wave re-radiation, re-radiation utilization, and measurement devices, which can solve problems that affect the effective positioning and classification of targets, weak received signal levels, and poor target parameter estimation effects.

Active Publication Date: 2018-06-01
NORTHWESTERN POLYTECHNICAL UNIV
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Problems solved by technology

However, when the radiated noise level of the target is low, the method of passive detection using RAP faces the problem of weak received signal level, resulting in a decrease in detection performance
At the same time, when using RAP pass

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  • Method for active classification and positioning of underwater targets based on reliable sound path
  • Method for active classification and positioning of underwater targets based on reliable sound path
  • Method for active classification and positioning of underwater targets based on reliable sound path

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Embodiment Construction

[0028] Main content of the present invention has:

[0029] 1) The detection of underwater targets is divided into two steps: first classification and then localization. First use the active detection method to obtain the pitch angle-distance two-dimensional map of the target scene, and draw a pitch angle-distance curve according to the reliable acoustic path, use this curve to classify the target to extract the pitch angle and distance of the underwater target, combine the sound field The information converts the pitch angle and distance of the underwater target into horizontal distance and depth, and obtains the positioning result.

[0030] 2) Place a single transmitting transducer and a multivariate vertical receiving array below the critical depth of the deep sea, the transmitting transducer transmits pulse signals, and the multivariate vertical receiving array collects echoes. A single transmitting transducer and multiple vertical receiving arrays form a single-base sonar...

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Abstract

The present invention relates to a method for active classification and positioning of underwater targets based on a reliable sound path. The method comprises the steps of: employing an active detection method to obtain a pitch angle-distance two-dimensional diagram in a target scene, drawing a pitch angle-distance curve according to a reliable sound path, employing the curve to perform target classification to extract pitch angles and distances of underwater targets, and combining sound field information to convert the pitch angles and the distances of the underwater targets to horizontal distances and depths to obtain location results. The method for active classification and positioning of the underwater targets based on the reliable sound path can perform effective positioning of the targets in a deep sea environment.

Description

technical field [0001] The invention belongs to the field of array signal processing, in particular to an underwater target active classification and positioning method based on a reliable acoustic path. Background technique [0002] The deep-sea reliable acoustic path (RAP: reliable acoustic path) is a channel for acoustic propagation unique to the deep sea. The condition for RAP to occur is that the transducer is located below the critical depth of the deep sea (the speed of sound at the critical depth is equal to the speed of sound near the sea surface), and at this time an acoustic propagation path from the sea surface to the transducer will be formed. This acoustic propagation path is not affected by near-sea surface effects or seabed interactions, and the propagation signal is stable and reliable, so it is called a reliable acoustic path (Rui D, Kun-De Y, Yuan-Liang M, et al.Areliable acoustic path: Physical properties and a source localization method[J].Chinese Physi...

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Application Information

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IPC IPC(8): G01S15/42
CPCG01S15/42G01S7/539
Inventor 刘雄厚刘佳鹏孙超杨益新
Owner NORTHWESTERN POLYTECHNICAL UNIV
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