A wireless sensor network positioning method using the symmetrical propagation characteristics of electromagnetic waves
A wireless sensor network and positioning method technology, applied in the field of wireless sensor network positioning, can solve the problems of unstable electromagnetic wave signal strength, large ranging error, and easy to be affected by environmental factors such as temperature, humidity, and heavy fog. Achieve the effects of eliminating adverse effects, improving accuracy, and enhancing positioning stability
Active Publication Date: 2019-03-19
广西乾浩科技有限公司
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[0009] The actual problem to be solved by the present invention is: the electromagnetic wave signal strength existing in the current RSSI positioning is unstable, easily affected by environmental factors such as temperature, humidity, and heavy fog, and will produce technical problems such as large ranging errors
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[0049] The implementation of the present invention will be described in detail below in conjunction with the accompanying drawings. This example is to illustrate the present invention more clearly, rather than limit the protection scope of the present invention.
[0050] figure 1 Algorithm flow chart for positioning based on RSSI using electromagnetic waves along spatially symmetrical propagation characteristics provided by the embodiment of the present invention; figure 2 It is a schematic diagram of the present invention using electromagnetic wave symmetry propagation. In the figure, A and B are anchor nodes, and the electromagnetic wave signal emitted by it propagates symmetrically in space, and when it reaches any point P on the vertical bisector Y between two points A and B , their electromagnetic wave signal strengths must be equal; image 3 It is a schematic diagram of positioning using two groups of symmetrical anchor nodes in the present invention. In the figure, A,...
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The invention is a positioning method of a wireless sensor network using symmetrical propagation of electromagnetic wave, and discloses a novel positioning method based on the node RSSI (received signal strength indicator). The method includes using the characteristic that the electromagnetic wave symmetrically propagates in space to design a new positioning technique; pairing the received electromagnetic wave according to signal strength, finding a symmetrical anchor node equidistant from the node to be tested, calculating the position of the node to be tested by the aid of location parameter of the symmetrical anchor node, and eliminating the adverse effects of changes in the signal strength of the electromagnetic wave on RSSI positioning to improve the positioning accuracy; using a centroid algorithm with the new positioning technique, and calculating the position of the node to be tested by the use of location parameters of at least three groups of symmetrical anchor nodes to further improve the accuracy and positioning stability.
Description
technical field [0001] The invention relates to a wireless sensor network positioning method, in particular to an RSSI-based wireless sensor network positioning method. Background technique [0002] A wireless sensor network (WSN, Wireless Sensor Network, WSN) is a wireless network composed of a large number of stationary or moving sensors in a self-organizing and multi-hop manner. Perceive the monitoring information of the object and report it to the user. [0003] A wireless sensor network is a wireless network composed of a large number of stationary or moving sensors in a self-organizing and multi-hop manner to cooperatively perceive, collect, process, and transmit information about perceived objects in the geographical area covered by the network, and finally transfer these Information is sent to the owner of the network. Wireless sensor networks have urgent application requirements and broad market prospects in military, civil, industrial and other commercial fields....
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IPC IPC(8): H04W64/00G01S5/02
CPCG01S5/0273H04W64/003H04W64/006
Inventor 文春明覃晓黄银娟
Owner 广西乾浩科技有限公司