Azimuth trace acquisition method and device for flexible towed linear array sonar noise target

A technology of target azimuth and towing, applied in the direction of measuring device, sound wave reradiation, radio wave measurement system, etc., can solve problems such as flexible towed linear array array disturbance, target azimuth trace interruption and deviation, complex underwater acoustic environment, etc.

Active Publication Date: 2021-01-29
NAVAL UNIV OF ENG PLA
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Problems solved by technology

[0004] The purpose of the present invention is to provide a flexible towed line array sonar noise target azimuth acquisition method and device, so as to effectively solve the problem of target azimuth track interruption and deviation caused by the flexible towed line array array disturbance and the complexity of the underwater acoustic environment , to improve the accuracy of sonar noise target tracking azimuth trace

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  • Azimuth trace acquisition method and device for flexible towed linear array sonar noise target
  • Azimuth trace acquisition method and device for flexible towed linear array sonar noise target
  • Azimuth trace acquisition method and device for flexible towed linear array sonar noise target

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[0134] Such as Figure 2 to Figure 4 Shown are the azimuth traces obtained by processing the high, medium and low SNR targets in the sea test data by using the method of the present invention respectively. Through comparison, it is found that the azimuth traces of the three types of targets are consistent with the target energies in the azimuth history map; among them, due to the influence of the complexity of the underwater acoustic environment, the energy of the low signal-to-noise ratio targets has obvious fluctuations, but the obtained azimuth traces are still continuous and stable , illustrating the effectiveness of the present invention.

[0135] Such as Figure 5 to Figure 8 Shown are the results of azimuth acquisition for targets with different signal-to-noise ratios when the flexible towed linear array is disturbed by factors such as ocean currents. Figure 5 In order to use the conventional cross-spectrum precision tracking method to process the azimuth trace map o...

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Abstract

The invention provides an azimuth trace acquisition method and device for a flexible towed linear array sonar noise target so as to effectively solve a problem of target azimuth trace interruption anddeviation caused by flexible towed linear array formation disturbance and underwater acoustic environment complexity, and improve the accuracy of a sonar noise target tracking azimuth trace. The method comprises the following steps: step 1, performing split sub-array frequency domain beam forming on current frame data of an array element channel according to flexible towed linear array array manifold information and a previous frame target orientation; step 2, carrying out target azimuth accurate measurement on the output formed by the frequency domain wave beam according to a processing frequency band; step 3, performing association confirmation on the target angle measurement value of the current frame by using a variable tracking gate, and removing and correcting outliers; and step 4,carrying out smooth filtering processing on the multiple frames of target azimuth values to obtain a stable and continuous target azimuth trace. The device applies the method. According to the invention, the technical problem of improving the accuracy of the sonar noise target tracking azimuth trace is solved.

Description

technical field [0001] The invention relates to the technical field of above-water azimuth acquisition, in particular to a method and device for acquiring an azimuth of a flexible towed linear array sonar noise target. Background technique [0002] In the passive sonar detection system, it is one of the most important functions to measure and track the noise target azimuth and obtain a stable and continuous target azimuth trace, which plays a supporting role in realizing the azimuth-only motion analysis and maneuver hearing of the noise target. The conventional method of obtaining the azimuth track of the sonar noise target is mainly to perform accurate direction finding based on the azimuth value of the previous frame, and then compare the angle measurement value of the current frame falling into the tracking gate with the target according to the artificially preset target tracking gate. Correlation, and so on, so as to obtain stable, continuous and accurate noise target az...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01S15/88G01S7/52
CPCG01S15/88G01S7/52004
Inventor 袁骏姜可宇姚直象幸高翔蔡志明孙晓鹏
Owner NAVAL UNIV OF ENG PLA
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