Shell sonar and towed linear array sonar target track association method

A technology of towed line array and target track, which is applied in the field of correlation between shell sonar and towed line array sonar target track. Problems such as starboard and starboard ambiguity can be achieved to improve the correlation accuracy and increase the robustness

Pending Publication Date: 2022-04-01
THE 715TH RES INST OF CHINA SHIPBUILDING IND CORP
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AI Technical Summary

Problems solved by technology

Compared with the towed line array sonar, the shell sonar has the advantages of high installation accuracy, good array consistency, and small direction finding error when detecting targets, but the base array aperture is limited by the space of the platform, and it is difficult to further expand; the towed line array The sonar is towed to the rear of the ship. Compared with the shell sonar, it is less affected by the background noise of the platform, and its array aperture is not limited by the space of the platform, which can realize long-distance target detection, but the towed array is a flexible array. , in the process of towing, it is easy to produce formation distortion, large error in direction finding, and there is still blurring of left and right sides of a single line array under non-maneuvering conditions

Method used

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  • Shell sonar and towed linear array sonar target track association method
  • Shell sonar and towed linear array sonar target track association method
  • Shell sonar and towed linear array sonar target track association method

Examples

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Embodiment

[0105] Set a moving target to move at a uniform angle (0.1° or 1° for each batch of samples) from the 90° direction of the observation point, and the system error and random error when the shell sonar detects the target orientation are both 1° or 2° In this case, the systematic error and random error when the towed line array sonar detects the target azimuth varies from 1° to 10°, and the maximum energy fluctuations when the shell sonar and towed line array sonar detect the target are both 30%. Uniform distribution, the maximum error of DEMON spectral feature extraction is 1Hz, obeying uniform distribution. The comparison between pure orientation correlation and orientation, energy, and DEMON multi-feature joint track correlation algorithm is shown in the figure Figure 1-4 mentioned.

[0106] It can be seen from the figure that in view of the large difference in direction finding accuracy characteristics between the shell sonar and the towed line array sonar, which affects t...

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Abstract

The invention belongs to the technical field of sonar, provides a shell sonar and towed linear array sonar target track association method, and aims to solve the problem that the target track association performance is easy to decline due to the fact that the shell sonar and the towed linear array sonar are large in direction finding precision characteristic difference and only board angle similarity is adopted for target track association. According to the method, multi-dimensional features such as the side angle, the signal-to-noise ratio and the DEMON spectrum of the target are extracted, joint association processing is carried out, the robustness of target track association of the shell sonar and the towed linear array sonar can be effectively improved, and the association accuracy is improved.

Description

technical field [0001] The invention belongs to the technical field of sonar, and is applicable to the technical field in which shell sonar and towed line array sonar in a submarine sonar system and a surface warship sonar system carry out associated processing on underwater passive detection target track, mainly a A method for associating target tracks between shell sonar and towed line array sonar. Background technique [0002] Modern submarine sonar systems and surface ship sonar systems are mainly composed of shell sonar and towed line array sonar. Compared with the towed line array sonar, the shell sonar has the advantages of high installation accuracy, good array consistency, and small direction finding error when detecting targets, but the base array aperture is limited by the space of the platform, and it is difficult to further expand; the towed line array The sonar is towed to the rear of the ship. Compared with the shell sonar, it is less affected by the backgrou...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01S15/88G01S7/537
Inventor 龚轶祝献黄迪诸洁琪
Owner THE 715TH RES INST OF CHINA SHIPBUILDING IND CORP
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