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Passive sonar azimuth course graph processing method, device and equipment

A azimuth history and map processing technology, which is used in measurement devices, sound wave re-radiation, character and pattern recognition, etc. The effect of obvious effect, suppression of shading effect, and improved visual effect

Active Publication Date: 2020-08-21
北京中安智能信息科技有限公司
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Problems solved by technology

However, in practical applications, the signal-to-noise ratio of underwater targets is usually relatively small, and the traditional azimuth history map is often used for target tracking. Especially when there are strong targets in the detection scene, due to the strong target The masking effect of the low signal-to-noise ratio target will further affect the display of the azimuth history of the low signal-to-noise ratio target, thus affecting the accuracy of the judgment of the passive sonar results

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  • Passive sonar azimuth course graph processing method, device and equipment
  • Passive sonar azimuth course graph processing method, device and equipment
  • Passive sonar azimuth course graph processing method, device and equipment

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[0049] Various exemplary embodiments, features, and aspects of the present disclosure will be described in detail below with reference to the accompanying drawings. The same reference numbers in the figures indicate functionally identical or similar elements. While various aspects of the embodiments are shown in drawings, the drawings are not necessarily drawn to scale unless specifically indicated.

[0050] The word "exemplary" is used exclusively herein to mean "serving as an example, embodiment, or illustration." Any embodiment described herein as "exemplary" is not necessarily to be construed as superior or better than other embodiments.

[0051]In addition, in order to better illustrate the present disclosure, numerous specific details are given in the following specific implementation manners. It will be understood by those skilled in the art that the present disclosure may be practiced without some of the specific details. In some instances, methods, means, component...

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Abstract

The invention relates to a passive sonar azimuth course graph processing method. The method comprises the following steps: acquiring an original frequency-azimuth matrix of each frame in a passive sonar azimuth course graph; sequentially carrying out noise estimation and smoothing processing on each original frequency-azimuth matrix frame by frame to obtain a frequency-azimuth matrix after smoothing processing; based on each smoothed frequency-azimuth matrix, performing signal-to-noise ratio normalization and weighting processing on each original frequency-azimuth matrix to obtain azimuth energy of each original frequency-azimuth matrix; integrating the azimuth energy to obtain an integral result, and quantitatively displaying the integral result to obtain a corresponding quantitative display result. According to the method, the visual effect of the passive sonar azimuth course graph is effectively improved, and the judgment accuracy of the calculation result of the passive sonar azimuth course graph is improved.

Description

technical field [0001] The present disclosure relates to the technical field of underwater target tracking, in particular to a passive sonar azimuth history map processing method, device and equipment. Background technique [0002] When processing passive sonar signals, an azimuth history map is usually used. The traditional normalization calculation method of the azimuth history map performs energy integration in the azimuth direction on the frequency-azimuth data obtained after beamforming, and quantifies and displays the energy integration results. This calculation method is suitable for target visual detection with strong signal-to-noise ratio. However, in practical applications, the signal-to-noise ratio of underwater targets is usually relatively small, and the traditional azimuth history map is often used for target tracking. Especially when there are strong targets in the detection scene, due to the strong target The masking effect of the low signal-to-noise ratio ...

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Application Information

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IPC IPC(8): G01S15/89G01S7/539G06K9/00
CPCG01S15/89G01S7/539G06F2218/04Y02A90/30
Inventor 陆桦江淮
Owner 北京中安智能信息科技有限公司
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