Research On WSN Coverage And Routing Algorithm Based On Long Straight Dome Type Mine Roadway

Mine laneway is responsible for the daily production of transport corridor,as well as the main escape emergency cases of staff,thus for the mine main roadway environment monitoring is the basis of production and safety.Sensor nodes as the basic building blocks of wireless sensor network has the advantages of low price,small size,stable and reliable,widely used in environmental monitoring field of natural conditions,especially suitable for the mine roadway construction environment monitoring.Long distance wireless communication in mine roadway under the condition of limited conditions,this requires a reasonable deployment of wireless sensor network node to roadway area completely covered in order to improve the quality of network coverage,and in view of the mine roadway long straight space characteristics to design reasonable routing protocol.The major work and innovations in paper are as follows:(1)To solve fixed wireless sensor network nodes coverage problem of underground roadway in dome type,based on the analysis and abstract underground roadway space type dome model,based on the derived for dome type transverse cross section of roadway with single sensor,two sensors,three sensors seamless coverage,under the condition of minimum radius of perception and roadway cross section the function relationship between the geometry size and the optimal deployment of sensor nodes.Then,in the dome type long straight roadway cross section of the minimum radius of perception sensor nodes deployed calculated on the basis of a roadway area a seamless coverage of seamless coverage,double weight minimum nodes density.This paper establish a universal function relationship among the dome type long straight geometry size of roadway and the radius of sensor nodes perception and the location of the node deployment which can be used to reasonably choose fixed node layout scheme,to ensure the mine roadway in completely cover the minimum density sensor nodes,which can effectively control the engineering cost,simplify the project operation.(2)On the basis of Mine long straight tunnel sensor nodes seamless coverage,This paper proposes a hierarchical network structure to abstract the long straight roadway network topology into three layer network structure: ordinary nodes network layer,cluster nodes network layer,sink nodes network layer.To avoid uneven network clustering result in sensor node communication path long problem,based on the principle of virtual grid,abstract mine long straight roadway into the joint of different small area.Each sensor node based on their location information belonging to the corresponding area automatically,each local area of the cluster head nodes based on local energy independent random election equilibrium position and local equilibrium principle.By comparing the distance of area around the cluster head nodes and neighboring areas of the cluster head nodes,ordinary nodes selection three cluster head nodes joined with the shortest distance.Sink node according to the fixed interval is uniformly distributed in roadway,the cluster head nodes and the Sink node communication based on the shortest path principle.At the same time,through single hop or multiple hops to the Sink node stations transmit data.Simulation experiments prove that the Routing protocol is more suitable for network topology space characteristics of long straight tunnels.Local routing network structure has better scalability,network energy consumption more balanced,prolong the life cycle of wireless sensor network.