Research On Location And Coverage Repair Of Mobile Intelligent Mines Based On Wireless Sensor Networks

The rapid development of information technology has made great changes in modern battlefield.As a traditional defensive weapon,the landmine has gained rebirth in this military revolution.The modern system of networked and intelligent minefield has become the research hotspot since it appeared.The study of mobile intelligent mines system based on wireless sensor networks mainly focuses on node location and coverage repair.The node location is the premise of minefield coordination.Accurate location is very beneficial for the mines to layout certain formation and attack the invasive target.Coverage and repair are directly related to the quality of blockade in the target zone and the life cycle of the system,which is of great significance in the war.This paper is aimed at studying the two major issues mentioned above.The research status of networked intelligent minefield at home and abroad has been deeply investigated.On the base of detailed introduction to the node location methods and coverage techniques in wireless sensor networks,the mine location algorithm based on received signal strength indication(RSSI)ranging and the minefield coverage strategy based on meshing were determined.To provide a guarantee for the follow-up research,the hardware design of the intelligent mine cored on CC2430/CC2431 was firstly completed.For the issue of location,this paper choosed the log-normal-shadowing radio transmission model and processed the RSSI experimental data by Kalman filter to get the specific model parameters,so the location experiment can be done.By summarizing and analyzing the results of node location experiment based on distance-weighted triangle centroid location algorithm,three shortcomings were pointed out when using the distance as the weight coefficient.And an area-weighted triangle centroid location algorithm was proposed,in which the overlapped area is used as the weight coefficient.The MATLAB simulation proved that the new algorithm can obviously improve the location accuracy,reduce the cost and enhance the reliability of the system.When it comes to the coverage and repair of the minefield,the commonly used meshing methods were introduced firstly.Taking into account the energy-saving factors,a specific coverage algorithm to form the grid in minefield was given.By adopting the distributed topology,an information fusion algorithm for minefield gap was provided,in which the threshold of neighbor node number is used as the criterion.Then,in order to solve the problem of rectangular gap in minefield,we designed a meshing repair algorithm according to the extent of minefield damage.Finally,the simulation carried out on the MFC platform proved the feasibility and rationality of the algorithm.