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Directional charger arranging method

A layout method and charger technology, applied to electrical components, wireless communication, network topology, etc., can solve problems such as limited placement of chargers, placement at triangle vertices or grid points in a grid, etc.

Active Publication Date: 2017-01-18
NANJING UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The existing work mainly considers the arrangement of omnidirectional chargers, and the places where the chargers can be arranged are limited, such as only at the vertices of triangles or grid points in the grid, so they have considerable limitations.

Method used

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Embodiment Construction

[0078] The present invention will be further described below with reference to the accompanying drawings and examples.

[0079] Such as figure 1 As shown, take each sensor as the center and divide concentric circles with L(1), L(2),..., L(K) as the radius. For convenience, use L (i) (k) Mark sensor i as a concentric circle of radius L(k). The basis for dividing concentric circles in this way is: in each adjacent concentric circle, such as L (i) (k-1) and L (i) (k), at any point in the formed circle, if the rotation angle set by a certain charger just covers the sensor i, then the power of the charger received by the sensor i can be approximately considered as a constant P r (L(k)).

[0080] Phase 2: Covering Dominant Set Extraction

[0081] After plane discretization, a finite number of sub-regions are obtained. In each sub-region, we consider how to further obtain all possible sensor sets covered by the charger.

[0082] First define the following two concepts.

[008...

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Abstract

The invention discloses a highly efficient directional charger arranging method, which comprises the following steps: 1) arranging N chargeable sensors in a two-dimensional area, whose positions are known and M directional wireless chargers are about to be arranged; 2) conducting discretization to the entire two-dimensional area for multiple sub-areas so that the number of the candidate points for the multiple wireless chargers is made finite and the purpose of doing so is to ensure that the interface power of each sub-area after discretization can be close to a constant value; 3) for each sub-area, obtaining all possible sets of sensors that can be covered by the chargers in the sub-area; 4) obtaining the locations of all chargers and their direction combinations by discretizing the planar areas and after the covered dominating set extraction of each sub-area. and 5) continuing to select, combine and arrange the chargers from all positions and direction combinations so as to maximize the overall charging effect of a network.

Description

[0001] 1. Technical field [0002] The invention relates to a method for arranging high-efficiency directional chargers in a wireless rechargeable sensor network. In the wireless sensor network, it can effectively arrange the position and orientation of the chargers to maximize the overall charging utility of the sensor network. [0003] 2. Background technology [0004] Traditional sensor nodes are usually powered by batteries, and the limited battery energy limits the overall life of the sensor network. Wireless energy transfer technology can completely solve this problem by sending energy wirelessly from the charger to the sensor. An important issue in wireless rechargeable sensor networks is the placement of wireless chargers, that is, how to effectively arrange chargers to maximize the overall charging utility of the sensor network. Existing work mainly considers the arrangement of omnidirectional chargers, and the locations where chargers can be arranged are limited, suc...

Claims

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Application Information

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IPC IPC(8): H04W16/18H04W84/18
CPCH04W16/18H04W84/18
Inventor 戴海鹏陈贵海刘斌李兰兰
Owner NANJING UNIV
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