Target tracking system and method for underwater sensor network

Abstract

The invention discloses a target tracking system and a target tracking method for an underwater sensor network. The target tracking system comprises a land network and a water area network, wherein the water area network comprises multiple underwater target tracking clusters and a water surface treatment center; and the underwater target tracking clusters comprise multiple underwater sensor nodes and a cluster head node. A target state is tracked in combination with an adaptive UKF (Unscented Kalman Filter) and a PF (Particle Filter) on the basis of correcting signal acquisition time delays of the sensor nodes. The tracking error caused by different sources of signals acquired by the sensor nodes at the same moment is reduced by correcting the time delays, so that a target can be more reliably tracked; and the adaptive UFK automatically adjusts a system noise weighing coefficient according to target maneuvering situation to more properly describe a practical target motion state, so that the shortcoming of inaccuracy of target maneuvering of a target motion model is overcome, an important function with more posteriori information is provided for the particle filter, the particle degeneracy is reduced, and the tracking precision is improved.

Description

technical field [0001] The invention relates to a sensor network system, in particular to an underwater sensor network target tracking system and method, and belongs to the technical field of underwater sensor network information processing. Background technique [0002] The ocean occupies two-thirds of the surface area of ​​the earth and is of vital significance to the survival and development of human beings. At present, human beings' understanding and development of the ocean is only at the initial stage. How to understand the ocean more deeply and use marine resources more rationally is a matter of far-reaching significance. With the continuous maturity and development of terrestrial wireless sensor networks, underwater sensor networks are also developing as an extension of terrestrial wireless sensor networks to underwater. Underwater sensor network provides a more comprehensive and profound way of understanding and using marine resources. Underwater passive target tr...

AI Technical Summary

Problems solved by technology

In the tracking method, the time-delay adaptive UKF_PF algorithm is used to overcome the problems caused by the long delay of underwater acoustic signals, so as to adapt to the underwater environment, and can automatically adapt to target maneuvering and improve tracking accuracy.

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