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Three-dimensional imaging sonar wave beam forming method and implementation method on multi-core processor

A multi-core processor and sonar technology, applied in the field of sonar, can solve the problems of low real-time performance, long time consumption, and large amount of calculation, and achieve the effect of high real-time performance, small amount of calculation, and easy implementation.

Active Publication Date: 2015-05-27
INST OF ACOUSTICS CHINESE ACAD OF SCI
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Problems solved by technology

[0004] The purpose of the present invention is to overcome the defects of large amount of calculation, long time consumption and low real-time performance existing in the three-dimensional imaging sonar in the prior art when performing array beamforming, thereby providing a sonar with a small amount of calculation and high real-time performance. beamforming method

Method used

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  • Three-dimensional imaging sonar wave beam forming method and implementation method on multi-core processor
  • Three-dimensional imaging sonar wave beam forming method and implementation method on multi-core processor
  • Three-dimensional imaging sonar wave beam forming method and implementation method on multi-core processor

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Embodiment Construction

[0025] The present invention will be further described now in conjunction with accompanying drawing.

[0026] Before describing the present invention in detail, the relevant concepts involved in this application are explained first.

[0027] Three-dimensional imaging sonar planar array: the planar array is a uniformly distributed planar array, including M×N array elements.

[0028] 3D Imaging Sonar Planar Array Beamforming Expression

[0029] The general expression for beamforming of 3D imaging sonar planar array is:

[0030] b ( r 0 , t , u ) = Σ m = 1 M Σ n = 1 N α m , n ...

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Abstract

The invention relates to a three-dimensional imaging sonar wave beam forming method applied to uniformly-distributed plane arrays in three-dimensional detection sonar. The method comprises the following steps: receiving and collecting time domain echo signals; carrying out time domain Fourier transform on the time domain echo signals, then judging whether the result obtained by the time domain Fourier transform meets the far-field condition or not, compensating distance influence items of a time delay calculation formula in a near-field wave beam forming expression formula, and then carrying out the next step if the result shows that the near-field wave beams are formed; directly carrying out the next step if the result shows that far-field wave beams are formed; carrying out spatial Fourier transform on row vectors of the plane arrays of the signals; carrying out spatial Fourier transform on line vectors of the plane arrays of the signals; performing a modulus on the obtained spatial two-dimensional Fourier transform result to obtain a final two-dimensional wave beam forming result.

Description

technical field [0001] The invention relates to the field of sonar, in particular to a three-dimensional detection sonar beam forming method and an implementation method on a multi-core processor. Background technique [0002] The security defense, attack and infiltration of the shore and port are an important mission of the frogman combat force. In addition, the work of the frogmen also includes tasks such as reconnaissance of underwater terrain, measurement of water depth, detection and removal of underwater obstacles, and underwater combat. . Three-dimensional detection sonar is a sonar device that assists frogmen in efficient underwater detection. The device uses sound waves to image near-field and far-field targets to expand the frogman's field of vision and working range. Three-dimensional detection sonar is an area array sonar system with sparsely arranged array elements, which can perform three-dimensional high-resolution imaging of underwater targets. Handheld thr...

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Application Information

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IPC IPC(8): G01S7/52
CPCG01S7/539
Inventor 王朋黄勇黄海宁刘纪元
Owner INST OF ACOUSTICS CHINESE ACAD OF SCI
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