Passive target detection method based on distributed sensor nodes

A distributed sensor and target detection technology, applied in services based on specific environments, direction finders and instruments using ultrasonic/sonic/infrasonic waves, etc., can solve problems such as difficulty in determining the location of nodes, achieve good practical value, and facilitate equipment. Deploy and reduce the effect of data transmission redundancy

Active Publication Date: 2020-08-07
ZHEJIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] (2) The nodes are distributed in the water area, and the movement of the water flow causes the movement of the nodes, which makes it difficult to determine the position of the nodes

Method used

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  • Passive target detection method based on distributed sensor nodes
  • Passive target detection method based on distributed sensor nodes
  • Passive target detection method based on distributed sensor nodes

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0077] In this embodiment, the above-mentioned detection method is applied to the detection of the underwater distributed sensor network, and the specific steps are as described above, and will not be repeated here.

[0078] This example was tested in the waters of Mogan Lake, Deqing County, Huzhou City in April 2019. The overall experimental system is divided into a transmitting system and a receiving system: the transmitting system is a small power amplifier connected to an omnidirectional transducer to transmit, simulating an underwater passive target; the receiving system is an NI device, an 8-way power amplifier and three receiving nodes composition.

[0079] The layout of the experiment on the lake is as follows: Figure 5 shown. The position coordinates of the three nodes are N1(0,0), N2(-8,0) and N3(0,10.8) respectively, and the position of the sound source is T(0,30). Transmit signal carrier frequency f c =10kHz, pulse width 0.5s, period length 1s. The target pos...

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Abstract

The invention discloses a passive target detection method based on distributed sensor nodes. The detection method comprises the following steps of: acquiring the radiation signals of an underwater target in a passive mode by utilizing tetrahedral array hydrophone nodes; estimating an arrival angle of the radiation signals of the target by a single node, and performing energy value detection on a frequency band where the monitored target radiation signals is located by a periodic diagram detection method to obtain a local node judgment result; and sending the local node judgment to a data fusion center, estimating the possible position of the target by a distributed system, and performing judgment fusion according to node detection performance to obtain global judgment optimization. According to the passive target detection method based on the distributed sensor nodes provided by the invention, underwater target detection performance can be improved.

Description

technical field [0001] The invention relates to the fields of multi-sensor acquisition and target detection, in particular to a passive target detection method based on distributed sensor nodes. Background technique [0002] Underwater area detection is an important link in modern ocean detection, and its detection results directly determine the subsequent target recognition and target tracking. With the reduction of the target radiation signal level and the use of sound-absorbing materials, the target signal will be covered by noise, and the traditional single-node detection method is restricted by the bottleneck. [0003] In order to improve the detection performance, the commonly used passive target detection methods include array signal processing to improve the receiving signal-to-noise ratio and centralized data fusion. However, the underwater acoustic channel is complex and changeable, and the remote transmission of large data volume is difficult, and the bit error r...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01S5/20G01S3/803H04W4/38
CPCG01S5/20G01S3/803H04W4/38
Inventor 潘翔章杰
Owner ZHEJIANG UNIV
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