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Underwater acoustic network topology sensing method based on vector orientation and distance measurement

An underwater acoustic network and vector orientation technology, which is applied to the direction or offset system, positioning, and measuring devices. It can solve the problems of long sensing period, complex hardware, and large size, and achieve high cost, complex algorithm, and reduction. The effect of small hardware facilities

Active Publication Date: 2021-03-26
NORTHWESTERN POLYTECHNICAL UNIV
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Problems solved by technology

It can be seen that the typical underwater acoustic network sensing system requires complex hardware, large size, high cost, and a long sensing cycle. Under the conditions of relatively narrow environmental conditions, low cost, and the need to quickly obtain the topology sensing results of the underwater acoustic network, obviously not applicable

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  • Underwater acoustic network topology sensing method based on vector orientation and distance measurement
  • Underwater acoustic network topology sensing method based on vector orientation and distance measurement
  • Underwater acoustic network topology sensing method based on vector orientation and distance measurement

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Embodiment Construction

[0031] Now in conjunction with embodiment, accompanying drawing, the present invention will be further described:

[0032] Main steps of the present invention are as follows:

[0033] Step 1: Create an analog receive signal

[0034] In the time domain, the received signal of the hydrophone is composed of five time series, and the three sections are the same chirp signal mixed with noise, and the middle frequency of the chirp signal is 30×10 6 Hz with a bandwidth of 2×10 5 Hz, the signal length is 0.05ms, and the signal-to-noise ratio is 10dB. The two noise signals are in the middle of the three chirp signals in the time domain. The time length of the two noise signals is different. Other noise signals mixed with the chirp signal are the same. It is essentially the noise signal of the input vector hydrophone on the way of the three nodes propagating the communication signal.

[0035] Step 2: Receive signal preprocessing

[0036] The received signal is de-DC, and then pre-pr...

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Abstract

The invention relates to an underwater acoustic network topology sensing method based on vector orientation and distance measurement, and belongs to the field of underwater acoustic signal processing.The method comprises steps of supposing that the underwater acoustic network node only has one signal source node, orientating two signal sources simultaneously based on a single vector hydrophone, gradually positioning all node positions in the underwater acoustic network by taking the source node as a reference and adopting an RSSI (Received Signal Strength Indicator) distance measurement method, and further positioning all nodes in the underwater acoustic network according to a time relationship that a signal arrives at the vector hydrophone; judging the information flow direction of the internal nodes of the underwater acoustic sensor network to complete underwater acoustic network topology sensing. According to the method, only one vector hydrophone is used, RSSI ranging and mathematical geometry methods are combined, the required hardware is less, the operation is simple, and the adaptability is high.

Description

technical field [0001] The invention belongs to the field of underwater acoustic signal processing, in particular to an RSSI ranging signal processing method for orienting underwater acoustic network topology nodes by using a single vector hydrophone. Background technique [0002] The perception problem of underwater acoustic network can be regarded as the development of traditional water area single target detection and recognition problem in underwater acoustic network. Traditional single-target perception methods generally rely on the capture of individual target acoustic signals to complete the perception of a single target. However, in the context of the network, the detection of a single target cannot solve the problem of underwater acoustic network perception. It is necessary to make full use of the information interaction between nodes in the network to perceive from the network level as a whole. [0003] A typical system for underwater acoustic network sensing has ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01S3/802G01S5/18G01S11/06
CPCG01S3/802G01S5/18G01S11/06Y02D30/70
Inventor 何轲夏远东申晓红董海涛王妍
Owner NORTHWESTERN POLYTECHNICAL UNIV
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