Novel broadband three-dimensional imaging sonar sparse arraying method

Abstract

The invention discloses a novel broadband three-dimensional imaging sonar sparse arraying method. The method comprises the steps of initializing preset parameters of a three-dimensional imaging sonar system array; calculating a Fermat spiral array arrangement constant according to the preset parameters; calculating the position of a transducer in a Fermat spiral array structure according to the preset parameters and the Fermat spiral array arrangement constant; replacing a transducer positioned in the inner circle of the three-dimensional imaging sonar Fermat spiral structure with a sound signal emission source transducer; resetting the preset parameters and determining a Fermat spiral ring surface sparse matrix according to the reset preset parameters; and converting the Fermat spiral ring surface sparse matrix into a Cartesian coordinate system. By using the method, the beam forming directivity diagram of the three-dimensional imaging sonar system is ensured to meet the use requirements, and the problems of high hardware consumption and large real-time calculation amount of the existing three-dimensional imaging sonar system are effectively solved. As a novel broadband three-dimensional imaging sonar sparse arraying method, the method can be applied to the technical field of underwater three-dimensional imaging sonar.

Description

technical field [0001] The invention belongs to the technical field of underwater three-dimensional imaging sonar, and in particular relates to a new sparse array method of broadband three-dimensional imaging sonar. Background technique [0002] In water, the real-time 3D imaging sonar system can obtain real-time 3D imaging of underwater scenes. It has a wide range of applications in the fields of submarine pipeline detection, submarine topographic mapping, underwater archeology and so on. However, in order to obtain a real-time underwater three-dimensional imaging map with a relatively high signal-to-noise ratio, a huge amount of data needs to be processed, and hundreds or thousands of beams need to be calculated. The number of sensors is directly proportional, which makes the structure of the whole three-dimensional imaging sonar system very large and complex. At present, some scholars have studied the sparse optimal array of 3D imaging sonar systems. For example, the si...

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Problems solved by technology

[0003] In order to solve the above-mentioned technical problems, the object of the present invention is to provide a new method of sparse array of 3D imaging sonar for wideband signals, which effectively solves the problems faced by the current 3D imaging sonar system while ensuring the beamforming directivity of the 3D imaging sonar system. The problem of high hardware consumption and large amount of real-time calculation

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