Underwater acoustic target dimension reduction matching sound field positioning method based on six-member cone vector array

A positioning method and vector array technology, applied in the field of underwater acoustic target dimensional reduction matching sound field positioning

Active Publication Date: 2020-12-18
HEILONGJIANG INST OF TECH
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Problems solved by technology

[0005] The object of the present invention is a method for dimensionality reduction and matching sound field positioning of underwater acousti...

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  • Underwater acoustic target dimension reduction matching sound field positioning method based on six-member cone vector array
  • Underwater acoustic target dimension reduction matching sound field positioning method based on six-member cone vector array
  • Underwater acoustic target dimension reduction matching sound field positioning method based on six-member cone vector array

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specific Embodiment

[0150] The example parameters are set as follows: the seawater depth is 1km, the six-element cone vector array is placed near the seabed, and the array element spacing is 10m. The sound source frequency is 200Hz, the sampling rate is 6.4kHz, and the sound velocity in water is 1480m / s. The sound source is located at an underwater depth of 5m, the horizontal azimuth angle to the hydrophone is 40 degrees, and the horizontal distance is 5km. Under the condition that the spectral-level signal-to-noise ratio is 5dB, the estimation results of 6 array elements are sequentially obtained by using the method of this patent (such as image 3 shown), and according to the above estimated value, scan within the horizontal distance of 1km to 10km to obtain the normalized spatial spectrum (such as Figure 4 shown). The average value of the obtained azimuth estimation results is 38.4 degrees, the average elevation angle estimation results are 9.3 degrees, and the average sound source depth es...

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Abstract

The invention relates to an underwater acoustic target dimension reduction matching sound field positioning method based on a six-member cone vector array, and belongs to the technical field of underwater acoustic target positioning. According to the method, complete information about the azimuth angle, the pitch angle, the depth and the horizontal distance of the sound source can be obtained by utilizing the six-member cone vector array, dimension reduction processing is carried out on final horizontal distance estimation by utilizing estimation information obtained successively, and the estimation efficiency is effectively improved through space scanning dimension reduction. In the invention, the minimum-scale three-dimensional array, namely the six-member cone vector array, is utilized,so that the method not only has full-airspace positioning capability, but also has positioning precision superior to that of a linear array and a planar array, meanwhile, the airspace fractal dimension characteristic advantages of the three-dimensional array are reserved, and the method has good symmetry and stability.

Description

technical field [0001] The invention relates to an underwater acoustic target dimensionality reduction matching sound field positioning method based on a six-element cone vector array, and belongs to the technical field of underwater acoustic positioning. Background technique [0002] At present, there are more and more methods for locating underwater target sound sources. Classified according to the length of the transponder base array baseline, it can be divided into long baseline positioning, short baseline positioning, ultra-short baseline positioning and the combination positioning of the first three methods; according to the working mode, it can be divided into active sonar positioning and passive positioning Sonar positioning; according to the type of basic array positioning, it can be divided into horizontal array positioning, vertical array positioning, ternary array positioning, planar array positioning, three-dimensional array positioning, etc.; at the same time, ...

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Application Information

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IPC IPC(8): G01S5/20
CPCG01S5/20Y02A90/30
Inventor 宋海岩
Owner HEILONGJIANG INST OF TECH
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