A three-dimensional forward-looking audio-visual sonar system and method
A sonar and three-dimensional technology, applied in the field of three-dimensional forward-looking audio-visual sonar system, can solve problems such as different beam widths
Active Publication Date: 2020-10-23
INST OF ACOUSTICS CHINESE ACAD OF SCI
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Problems solved by technology
[0003] The purpose of the present invention is to solve the problem that the angular resolution is affected by the array aperture, that is, the beam width, and the beam width of different orientation directions is different when the conventional beamforming method is used for sonar data processing in the prior art, thereby improving the detection effect of 3DFLS, Improve its adaptability to the environment
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[0102] The present invention will be described in detail below in conjunction with the accompanying drawings and specific embodiments.
[0103] The 3DFLS suitable for complex environments proposed by the present invention mainly includes a transmitting line array, a receiving array and a data processing module designed based on the array.
[0104] As shown in FIG. 1(a), FIG. 1(b) and FIG. 1(c), each transmitting element in the transmitting array corresponds to a transmitter.
[0105] The transmitting linear array is composed of a plurality of arc-shaped primitives at equal intervals, and by changing the vertical transmitting aperture and adjusting the vertical transmitting beam width, the detection of different coverage areas in relatively shallow water environments is realized.
[0106] The receiving array is composed of multiple layers of circular arc arrays with the same layer spacing; multiple primitives are arranged at equal intervals in each layer of circular arc arrays....
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The invention provides a three-dimensional forward-looking audio-visual sonar (3DFLS) system and method. The 3DFLS system comprises a sonar cabin, an emitting linear array, a receiving array and a data processing module; the emitting array changes the vertical emitting aperture to adjust the vertical emitting wave beam width, and thus the shallow water environment is detected; the receiving arraycomprises multiple layers of receiving arc arrays, the interlayer spacing is same, a plurality of receiving elements are distributed in each layer of receiving arc array at equal intervals, and the receiving arc arrays adhere to the bottom of the sonar cabin; and the data processing module is arranged in the sonar cabin and used for processing detection data of the emitting array and the receivingarray. The method comprises the steps that the emitting array sets an emitting wave beam through the data processing module and process the emitting wave beam stably, the receiving array processes echo data, coordinates of scattering points in a three-dimensional space are calculated, and three-dimensional acoustic imaging is obtained. An emitting scheme capable of adjusting the wave beam width is adopted, different water body environments are adapted more excellently, thus the detection effect of the 3DFLS is improved, and adaptability to the environment is improved.
Description
technical field [0001] The invention relates to the technical field of marine acoustic equipment, in particular to a three-dimensional forward-looking audio-image sonar system. Background technique [0002] With the increase of human ocean activities, the detection and imaging of underwater targets has become one of the main directions of research in recent years. Three-dimensional forward-looking sonar (3DFLS) is mainly used to detect obstacles, targets and sea bottom in three-dimensional space in front of the carrier, and is an important acoustic imaging sonar installed on underwater carriers. From the perspective of the scanning form of beamforming, the existing 3DFLS can be divided into two categories: mechanical scanning and electronic scanning: mechanical scanning 3DFLS uses mechanical rotation to complete horizontal and vertical scanning and then completes underwater scanning. 3D reconstruction, this type generally has a simple structure and low imaging efficiency; e...
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IPC IPC(8): G01S15/89G01S7/539G01S7/527
Inventor 刘晓东张东升程亚楠王晏宾吴明明王凯曹金亮王舒文
Owner INST OF ACOUSTICS CHINESE ACAD OF SCI