Skip distance correction WSN three-dimensional space target positioning method based on coplanarity

Abstract

The invention discloses a skip distance correction WSN three-dimensional space target positioning method based on coplanarity. The method comprises the following steps: first, the RSSI distance measurement technology is employed to measure a distance between adjacent nodes; second, beacon node information is received and transmitted through a distance vector exchange protocol, and minimum skip values and cumulative distance of all the nodes and a beacon node are obtained; third, a correction parameter is calculated, and the cumulative distance is corrected according the correction parameter; fourth, the coplanarity value of each positioning unit is calculated, and the best positioning unit is selected based on the coplanarity values; fifth, a four-face measuring method is employed to calculate a coordinate of an unknown node according to the selected best positioning unit; sixth, a quasi-Newton method is employed to optimize the coordinate of the unknown node; seven, the node positioned successfully is raised to a beacon node to participate in secondary positioning. The best positioning unit suitable for positioning is selected based on coplanarity values, the quasi-Newton method is employed to raise the positioning result precision, and positioning precision and the positioning coverage rate of three-dimensional space positioning can be raised.

Description

technical field [0001] The invention belongs to the field of computer wireless sensor networks, in particular to a WSN three-dimensional space target positioning method based on jump distance correction of coplanarity. Background technique [0002] Wireless sensor network (Wireless Sensor Network, WSN) is a network composed of a large number of sensor nodes with acquisition, calculation and wireless communication capabilities through multi-hop and self-organization. information and send it to observers. Location information plays an important role in wireless sensor network monitoring and other applications, as well as in routing selection, reliability and security guarantees. Monitoring messages without location information are often meaningless. Therefore, positioning technology has become one of the essential supporting technologies for wireless sensor network applications. At present, the international research on WSN node positioning is mainly concentrated on the two-...

AI Technical Summary

Problems solved by technology

In 3D space, at least four reference nodes are needed to determine the position of unknown nodes, which not only requires increasing the density of reference nodes, but also increases the algorithm complexity

(2) If there are terrain obstacles, it will affect the transmission signal between nodes

The impact of non-line-of-sight transmission caused by terrain in three-dimensional space on the signal cannot be ignored, so using RSSI to calculate the distance between nodes will have a certain error, which will affect the positioning accuracy

At present, the research on two-dimensional positioning technology of wireless sensor network has become mature, but the research work on three-dimensional positioning technology is still rare, and there is no mature standard

At present, the existing 3D positioning technology generally adopts the method of extending the 2D plane positioning algorithm to the 3D space. The problem of directly extending the 2D plane WSN positioning algorithm to the 3D space is that it does not consider the complexity of the 3D space. It will lead to a substantial increase in the amount of calculations, leading to problems such as cumulative errors

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