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A localization method for underground wireless sensor network

A wireless sensor network and positioning method technology, applied in the field of wireless sensor network positioning, can solve the problems of poor positioning accuracy, achieve the effects of improving positioning coverage and positioning accuracy, saving energy, and increasing scientificity and rationality

Inactive Publication Date: 2020-02-07
SOUTHWEST PETROLEUM UNIV
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Problems solved by technology

[0004] The purpose of the present invention is to provide a high-precision wireless sensor network positioning method that can save energy in the mine environment in order to solve the problem of poor positioning accuracy caused by sudden changes in the underground environment

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  • A localization method for underground wireless sensor network
  • A localization method for underground wireless sensor network
  • A localization method for underground wireless sensor network

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Embodiment Construction

[0026] Attached below figure 1 , 2 , 3, 4 further illustrate the positioning method of the present invention.

[0027] 1. Combining with figure 1 , the overall steps of this positioning method are as follows: First, before the node layout is fixed, the position of each node is adjusted in advance. First arrange each node according to the random principle, and then calculate the resultant force on each node according to this position to determine the sensor movement and the maximum sensing area coverage of the unknown nodes carried by the miners, and then iteratively execute the algorithm to make the coverage reach the threshold value, and then use the virtual mobile sensor to determine the final position, and finally use the mobile sensor to complete the node layout; then use the angle (AOA) for preliminary positioning, and according to the angle information of the unknown node reaching each anchor node, if the unknown node appears, the current wake-up node m(x m ,y m ) c...

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Abstract

The invention relates to a method for locating a downhole wireless sensor network based on an optimized differential evolution algorithm. By adoption of the method, the problem that the locating precision becomes worse due to mutation of downhole environment is solved. The technical scheme is as follows: the method comprises the following steps: performing node arrangement with maximum efficiency on downhole nodes by using an ME-VFA algorithm, debugging the positions of the nodes at first, and determining a maximum perceptual area coverage and a threshold of the nodes according to a resultant force of the nodes; then performing primary locating by using the AOA technology, calculating a signal arrival angle of a signal according to angle information of an unknown node arriving at each auxiliary node, and storing own position coordinates; and finally performing precise locating by using a differential evolution method, and performing variation, interaction, selection and processes on an initial position to obtain the coordinates of the unknown node. By adoption of the method provided by the invention, the effective coverage and connectivity of the network are improved, and the energy of the nodes is saved; and the locating method has the advantages of improving the downhole locating coverage and the locating precision, and improving the scientificity of node arrangement.

Description

technical field [0001] The invention relates to an underground wireless sensor network positioning method based on an optimized differential evolution algorithm, which is suitable for the technical field of wireless sensor network positioning. Background technique [0002] In recent years, mine safety accidents have occurred frequently in our country, and various vicious accidents have occurred continuously, resulting in huge economic losses and casualties. Most of the existing downhole positioning systems use positioning systems based on RFID (Radio Frequency Identification) radio frequency identification technology. Most of these systems have problems such as insufficient positioning accuracy and cost-limited accuracy. In foreign countries, it is generally to use wireless methods such as infrared to transmit to the ground through leaky cables, and the ground computer processes the received data to locate underground personnel. The General Institute of Coal Research has de...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04W64/00H04W84/18
CPCH04W64/00H04W84/18Y02D30/70
Inventor 赖欣周乐张珣邱勇智汪春浦胡泽葛亮陆阳
Owner SOUTHWEST PETROLEUM UNIV
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