Underwater wireless sensor network target tracking method based on sensor node strategy selection

Abstract

The invention discloses an underwater wireless sensor network target tracking method based on sensor node strategy selection. According to the method, firstly, a node which is closest to an initial position in estimated distance is used as a processing node, wherein the node is selected according to initial position estimation and variance estimation of a moving target, then the node is used as a circle center, estimated triple distance of standard deviation is used as a radius to select an observing node, and when the distance between the position of the observing node and the position of a target is smaller than observing range of a sensor, observing data is sent to the processing node which is used for estimating a target position estimation value and a variance estimation value using kalman filtering according to the observing value. A sensor node closest to the target position is selected according to the target position estimation value and used as a processing node of the next time, and the position estimation value and the variance estimation value of the processing node of the previous time are sent to the current processing node until the moving target exceeds the tracking range of an underwater sensor network. By means of the underwater wireless sensor network target tracking method based on sensor node strategy selection, energy consumption and communication load of underwater wireless sensor network target tracking are effectively lowered.

Description

technical field [0001] The invention relates to an underwater wireless sensor network target tracking method for sensor node strategy selection Background technique [0002] Underwater wireless sensor network refers to a network in which a large number of sensor nodes and autonomous vehicles are deployed in a certain water area to cooperate in monitoring and collecting data of interest in the surrounding environment. Sensor nodes can self-organize to establish a network and perform acoustic communication. , the designated node transmits the acquired data to the surface or shore-based control center, thus realizing the integration of the underwater sensor network and the land communication network. Underwater sensors usually feature low power consumption and short transmission distances. [0003] Underwater target tracking is an important application of underwater sensor networks. The underwater sensor network has the characteristics of wide distribution and large number of...

AI Technical Summary

Problems solved by technology

Such nodes account for the vast majority in large-scale underwater sensor networks. If the above-mentioned nodes are kept working for a long time, not only the useless information generated will seriously encroach on the already very precious underwater channel spectrum resources, but also cause these Waste of node energy

Underwater sensor nodes are generally powered by batteries. Due to the complex environment, the working life of batteries is generally one-time, and energy constraints seriously reduce the working time of sensors.

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