Synergic positioning system and method for wireless sensor network diffusion gas source base on mobile agent

Abstract

The invention provides a cooperative localization system of the gaseous diffusion source in the wireless sensor network based on the mobile proxy and a method thereof, wherein, the gaseous source detection sensor node automatically builds the network via the wireless mode. A metrological sensor node in the network provides the environment related information including wind speed and temperature; a time synchronous node provides the time synchronous information; the gaseous source detection sensor node periodically collects the measurement data of the gas concentration at the node position in the certain time interval; an alarm gaseous source detection sensor node works out the initial estimation of the position of the gaseous source according to the own local data, the metrological data of the metrological sensor and the mathematical model of the gaseous source diffusion, and generates a mobile proxy module carrying the estimation value of the position of the gaseous source and the optimal measurement data, and selectively transfers to a neighboring node; the neighboring node synthesizes the own sensor data and the information came from the mobile proxy module and re-estimates the position of the gaseous source for obtaining the optimum estimation of the position of the gaseous source.

Description

technical field [0001] The invention relates to an information processing method of a wireless sensor network, in particular to a wireless sensor network diffusion gas source cooperative positioning system and method based on a mobile agent. Background technique [0002] A wireless sensor network is an application-oriented network formed by wirelessly interconnecting a large number of sensor nodes with capabilities of perception, communication, computing and storage. The fundamental purpose of wireless sensor networks is to perceive and obtain knowledge and status of the objective physical world, and has the remarkable characteristics of large-scale deployment, small size, low cost, and limited resources. Communication system design, where reliable information transfer is the focus, is significantly different. Due to the broad application prospects of wireless sensor networks in environmental monitoring, battlefield perception, biomedicine and anti-terrorism security, there...

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Problems solved by technology

Sending a large amount of data to the cluster head node or the central node will consume a lot of energy of the nodes, and the complex information processing algorithm also has high requirements for the computing power and storage resources of these nodes, so this kind of spatially distributed measurement and centralized calculation is based on The characteristic information processing method has great limitations in the wireless sensor network

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