Node positioning method of wireless sensor network for environmental monitoring
A wireless sensor network and environmental monitoring technology, applied in wireless communication, service based on location information, electrical components, etc., can solve the problems of low cost and poor positioning accuracy
Active Publication Date: 2015-11-25
NANJING UNIV OF POSTS & TELECOMM
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This type of algorithm does not need to measure the distance or angle between nodes in the positioning process, but uses the estimated distance between nodes to realize the positioning of nodes, so the hardware implementation cost is low, but the positioning accuracy is poor
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[0043] The technical scheme of the present invention will be further described in detail below in conjunction with the accompanying drawings:
[0044] Such as figure 1 As shown, it is assumed that some sensor nodes are randomly deployed in a field environment. These sensor nodes are static and can be divided into two types: beacon nodes and unknown nodes. At the same time, a small number of movable nodes are also deployed in the environment. Both beacon nodes and movable nodes are equipped with GPS devices, which can accurately obtain their own coordinates.
[0045] In the wireless sensor network constructed above, each sensor node is equipped with a microcontroller and radio frequency transceiver. When a node receives a wireless signal, it can measure the RSSI value of other node signals received within the communication radius R through the radio frequency transceiver. The classic Shadowing model is used here.
[0046] In the initialization phase of the sensor network, the area...
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The invention discloses a node positioning method of a wireless sensor network for environmental monitoring. The node positioning method comprises the following steps: dividing an area to be monitored into a plurality of square grids, and respectively deploying beacon nodes with GPS (Global Position System) devices in four vertexes of each grid, wherein the distance between adjacent two beacon nodes is the wireless communication radius of the beacon nodes; randomly deploying unknown nodes in the monitored area; and dividing the area to be monitored and calculating coordinates of the unknown nodes according to the connectivity rate of the unknown nodes and the number of the beacon nodes detected in the communication range. According to the invention, communication among various nodes is realized through the wireless sensor network; wiring is unnecessary; the wireless sensor network is simple in structure and simple and convenient to install and maintain; various node distribution conditions in environmental monitoring are comprehensively considered; the monitored area is divided in detail; various practical node distribution conditions can be handled; and thus, the practicability is high.
Description
Technical field [0001] The invention relates to the technical field of environmental monitoring, in particular to a node positioning method of an environmental monitoring wireless sensor network. Background technique [0002] In recent years, as pollution has become increasingly serious, my country's ecological environment has become worse and worse. How to effectively monitor the environment and control pollution has become the most important issue that the Chinese government and all walks of life are concerned about. Compared with the strategy of combining a small number of environmental monitoring stations and manual sampling in the traditional method, the use of the Internet of Things technology to construct a large-scale distributed environmental monitoring network has the advantages of high real-time performance, low cost, simple maintenance, and high degree of intelligence. It is environmental monitoring Provides a practical solution. In the application of environmental ...
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IPC IPC(8): H04W4/02H04W64/00
CPCH04W4/023H04W64/003
Inventor 沈澍孙力娟邹志强王汝传孙坚
Owner NANJING UNIV OF POSTS & TELECOMM