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Binary system sensor network correction weight grid centroid method object positioning strategy

A technology of target positioning and centroid method, applied in network topology, data exchange network, transmission system, etc., can solve the problems of large positioning error, poor real-time performance, and high computational complexity of particle filtering, and achieve the goal of reducing positioning error and achieving good goals. The effect of positioning

Inactive Publication Date: 2012-05-30
JIANGNAN UNIV
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Problems solved by technology

Among them, the traditional centroid positioning algorithm is very simple and is completely based on network connectivity; on this basis, there is also a weighted centroid positioning algorithm. The reason why the particle filter algorithm is not applicable is that the particle filter algorithm has high computational complexity and poor real-time performance, and is not applicable to sensor node level. processing
Ordinary multi-grid positioning algorithm mainly studies the positioning of a single target by a distributed binary sensor network. Its positioning principle is simple, easy to implement, and its computational complexity can be adjusted. large positioning error

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  • Binary system sensor network correction weight grid centroid method object positioning strategy
  • Binary system sensor network correction weight grid centroid method object positioning strategy
  • Binary system sensor network correction weight grid centroid method object positioning strategy

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Embodiment Construction

[0016] Below in conjunction with accompanying drawing and specific example the present invention will be further described:

[0017] a) Initial arrangement of sensor network nodes:

[0018] First, 200 sensor nodes are randomly deployed in the middle of the mission area.

[0019] b) Further narrow down the area where the target exists:

[0020] Such as figure 2 As shown, for the convenience of calculation, this area is taken as a rectangle. Then the rectangular area is evenly divided into M grids (M=w 2 , w is a natural number), select the grid points that meet the following requirements, and then calculate the coordinates of these selected grid center points, and use the mean value of their coordinates as an estimate of the target position. The selection condition is: some of these grids are inside the nodes that cannot detect the target in the neighbor nodes, according to the distance d between all the grids and these neighbor nodes that cannot detect the target, if dfig...

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Abstract

The invention belongs to wireless sensor network technology field and discloses a novel sensor network node positioning method. The method is used to perform object positioning in a wireless sensor network area. When a number of nodes in the area is limited and the nodes can not be moved once the nodes are put in their place, the positioning for each time point with errors as little as possible should be performed if the object is passes the area. For the above problem, combining a traditional centroid localization method, the invention discloses the grid centroid positioning method based on the correction weight. By using the method, the object existence areas can be effectively reduced. Under the consideration of different dominant positions of the several grids in the object existence areas, combining the weight and the correction, positioning precision can be greatly increased.

Description

1. Technical field [0001] The invention belongs to the technical field of wireless sensor network target positioning, and can aim at how to locate the target position in this area as much as possible for the limited nodes of the wireless sensor network, so as to introduce the method of grid and correction weight, and then combine with the centroid method, Realize the improvement of positioning accuracy. 2. Background technology [0002] With the rapid development of semiconductor technology, microsystem technology, communication technology, and computer technology, in the late 1990s, wireless sensor network (wireless sensor network, WSN) technology was predicted by some important international organizations as an important new technology that will change the world. , related research work is actively carried out in major countries in the world [1] . However, when the network is applied to fields such as geophysics (such as earthquake monitoring), military systems, emergenc...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L12/24H04L29/08H04W64/00H04W84/18
Inventor 彭力刘刚
Owner JIANGNAN UNIV
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