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High resolution three-dimensional acoustic imaging system

An imaging system and high-resolution technology, used in radio wave measurement systems, sound wave re-radiation, and utilization of re-radiation, etc., can solve problems such as large amount of calculation, complex hardware system, and expensive equipment, and reduce hardware complexity. The effect of reducing the number of array elements and reducing the amount of calculation

Active Publication Date: 2018-06-19
INST OF ACOUSTICS CHINESE ACAD OF SCI
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  • Abstract
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  • Claims
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AI Technical Summary

Problems solved by technology

However, large planar transducer arrays cause complex hardware systems, huge calculations and expensive equipment

Method used

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  • High resolution three-dimensional acoustic imaging system

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Experimental program
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Effect test

Embodiment 1

[0053] In this embodiment, the experimental environment of the three-dimensional imaging sonar parameters is as follows: the operating frequency of the sonar is 60kHz, the sound velocity c=1500m / s, the horizontal angular resolution is 2°, the vertical angular resolution is 2°, The vertical beamwidth of the horizontal receiving array is 45°, and the horizontal beamwidth of the vertical receiving array is 45°.

[0054] calculation process:

[0055] First, according to formula (1), calculate the matrix length of horizontal receiving matrix 5 and vertical receiving matrix 6;

[0056]

[0057] Through calculation, it can be obtained that the array length Md of the horizontal receiving array 5 and the vertical receiving array 6 is at least 0.3422 meters; therefore, the optional array length Md is 0.35 meters. According to the fact that the horizontal receiving array 5 and the vertical receiving array 6 are uniform linear arrays, and the distance between adjacent array elements i...

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Abstract

The invention provides a high resolution three-dimensional acoustic imaging system. The high resolution three-dimensional acoustic imaging system comprises a horizontal imaging module and a vertical imaging module, wherein the horizontal imaging module and the vertical imaging module are arranged in a cross mode, the horizontal imaging module comprises a horizontal receiving matrix (5), a first emission array (1) and a second emission array (2), two ends of the horizontal receiving matrix (5) are distributed with the first emission array (1) and the second emission array (2), the vertical imaging module comprises a vertical receiving matrix (6), a third emission array (3) and a fourth emission array (4), and two ends of the vertical receiving matrix (6) are distributed with the third emission array (3) and the fourth emission array (4). The four emission arrays simultaneously emit orthogonal signals, the horizontal receiving matrix (5) and the vertical receiving matrix (6) receive theorthogonal signals, the three-dimensional information in the horizontal, vertical and distance directions of an underwater target is acquired, and three-dimensional acoustic images of the underwater target are constructed.

Description

technical field [0001] The invention relates to the technical field of underwater acoustic signal processing, in particular to a high-resolution three-dimensional acoustic imaging system. Background technique [0002] In recent years, with the development of marine industry, underwater acoustic detection and recognition technology has been rapidly improved, making underwater detection and recognition technology widely used in seabed landform surveying and mapping, underwater target detection, oil pipeline detection, underwater vehicle collision avoidance, etc. It has been widely used in many military and national economic fields. Three-dimensional imaging sonar is a new type of underwater three-dimensional acoustic imaging equipment, which can distinguish underwater targets in the pitch direction, horizontal direction and distance direction, and present a three-dimensional stereoscopic image. [0003] Most 3D imaging sonars use planar transducers to receive arrays. In order...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01S15/89
CPCG01S15/89
Inventor 闫路许枫杨娟崔雷雷安旭东
Owner INST OF ACOUSTICS CHINESE ACAD OF SCI
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