Location method and system for three-dimensional sensor node

Abstract

The invention discloses a location method and system for a three-dimensional sensor node. The method comprises the following steps: calculating distances among all the nodes, wherein the nodes includeanchor nodes and unknown nodes; eliminating the anchor nodes greater than an error threshold value by virtue of a clustering algorithm, and obtaining the anchor nodes accurate in the distance; according to the anchor points accurate in the distance, selecting a preset number of initial anchor nodes; and according to the initial anchor nodes, locating each of the unknown nodes by virtue of a masscenter iteration method. By virtue of the method or system disclosed by the invention, a gross error increased by dimensionality on ranging estimation can be avoided, and location accuracy is furtherimproved.

Description

Technical field [0001] The present invention relates to the technical field of systems engineering, in particular to a method and system for positioning a three-dimensional sensor node. Background technique [0002] Wireless sensor network is a special wireless self-organizing network, which is composed of a large number of randomly distributed sensor nodes, sink nodes, Internet network and user management center. Sensor nodes include anchor nodes that are equipped with positioning equipment and can obtain their own location and unknown nodes. The location of the unknown node requires a design method to obtain the location. Considering the cost limitation of positioning equipment in a large-scale sensor network, studying how to use the communication information between anchor nodes and unknown nodes to locate unknown nodes is the key technology of the present invention. [0003] At present, the sensor network positioning technology focuses on two-dimensional planar positioning meth...

AI Technical Summary

Problems solved by technology

Two-dimensional sensor node positioning technology has been relatively mature and has been widely used in many fields. However, sensor networks in complex environments are often randomly deployed in various terrains, such as mountains, underwater, and in the air. Due to the influence of vertical height, the two-dimensional planar WSNs positioning is far from meeting the unknown needs of perception information, so the three-dimensional sensor network positioning technology emerges as the times require

However, due to cost constraints, the above methods are not suitable for large-scale sensor positioning strategies in complex environments. Therefore, it is of great practical significance to seek large-scale 3D node positioning technology with high precision, low cost, and low computational complexity.

Images