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Underwater target three-dimensional positioning method realized based on distributed arrays

An underwater target, three-dimensional positioning technology, applied in the field of sonar digital signals, can solve the problem of low positioning accuracy

Inactive Publication Date: 2015-10-14
INST OF ACOUSTICS CHINESE ACAD OF SCI
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Problems solved by technology

[0003] The purpose of the present invention is to overcome the defects of the prior art that the positioning accuracy of underwater targets is not high, thereby providing a three-dimensional positioning method for underwater targets with high positioning accuracy

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  • Underwater target three-dimensional positioning method realized based on distributed arrays
  • Underwater target three-dimensional positioning method realized based on distributed arrays
  • Underwater target three-dimensional positioning method realized based on distributed arrays

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Embodiment Construction

[0038] The present invention will be further described now in conjunction with accompanying drawing.

[0039] The underwater target three-dimensional positioning method of the present invention is based on a distributed multi-array detection system. The distributed multi-array system includes a plurality of nodes, each node is a line array including a plurality of array elements, and the array elements in the line array are horizontal arrays or vertical arrays. These nodes are usually located at different locations in the water. In one embodiment, the distributed multi-array detection system used in the present invention includes three vertical array nodes, such as figure 1 As shown in , the three vertical array nodes are respectively arranged on the three vertices of a triangle with a side length of about 3 kilometers. Among them, No. 1 and No. 2 nodes are vertical arrays with 32 elements, and the inter-array spacing is 1.5m, which are evenly distributed in the water depth ...

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Abstract

The invention relates to a underwater target three-dimensional positioning method realized based on distributed arrays. The distributed arrays comprise a plurality of nodes. Each node is a linear array which comprises a plurality of array elements. The nodes are arranged at different positions in water. The underwater target three-dimensional positioning method comprises the steps of performing matching field positioning on a same target by each node in the distributed arrays, thereby independently performing depth elimination and distance elimination on a same target; and performing cooperative positioning on an estimated result which is obtained through performing matching field positioning on the same target by each node at same time, thereby realizing three-dimensional positioning on a underwater target. The cooperative positioning comprises correcting a horizontal direction positioning result according to a linear least square algorithm, and performing estimation in a manner that an average value of the target positioning depth of each node is used as a target depth. The underwater target three-dimensional positioning method has an advantage of high positioning precision.

Description

technical field [0001] The invention relates to the field of sonar digital signals, in particular to a three-dimensional positioning method for underwater targets based on distributed multi-arrays. Background technique [0002] The underwater acoustic signal matching field processing technology based on the multi-sensor array makes full use of the characteristics of the multi-path propagation of the underwater acoustic channel, and can realize the estimation of the distance and depth of the target. Therefore, this technology has important application value in judging the type of target and the degree of threat. Specifically, linear matched field processing (CMFP) technology uses the method of directly correlating the measured data with the copy vector predicted by the mathematical model at the set target position to estimate the position of the sound source, which has the advantage of being better for environmental parameter mismatch. The disadvantage is that the side lobe i...

Claims

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Application Information

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IPC IPC(8): G01S5/28
CPCG01S5/28
Inventor 郑胜家李晓张春华
Owner INST OF ACOUSTICS CHINESE ACAD OF SCI
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