| Underground coal mining environment is harsh in China,and various safety accidents often occur.Deployment of wireless sensor network real-time monitoring of coal gob area of production and personnel safety,improve the timeliness and accuracy of emergency response to sudden disaster warning,to avoid causing significant casualties and economic losses is an important move underground coal mining.However,the narrow and long geographical environment of coal mine tunnels deepens the imbalance of energy consumption between sensor nodes,which can easily lead to energy hole problems and "hot spots" in the network.Therefore,the research on the non-uniform clustering routing protocol applied to wireless sensor networks in mines,to achieve the effective use of sensor nodes energy and extend the life of the network,has important safety and economic significance for coal mine production.First,the sensor nodes that are powered by batteries have limited energy characteristics.Secondly,compared with wireless sensor networks in other scenarios,wireless sensor networks deployed in mines are more susceptible to energy hole problems and "hot spot" problems.The energy consumption problems reflected by the above two aspects lead to a short life of the mine wireless sensor network,which is difficult to meet the needs of the mine long-term coal mining operations.This paper proposes to adopt a non-uniform clustering strategy to plan mine wireless sensor networks,and establish a network model suitable for mines according to the geographical characteristics of mines.It was used to verify the effectiveness of the established model in terms of energy saving,and formal Petri-net was used to analyze the correctness and feasibility of the established model by MATLAB simulation experiments.The specific research contents of this article are as follows:1)Due to the narrow and long geographical characteristics of coal mine tunnels,the degree of "hot spots" problems and energy hole problems that the network faces is further deepened.The network model and energy consumption model designed for the mine wireless sensor network must not only satisfy the network-related parameters to determine the non-uniformity of the network,but also meet the distance from the base station to select a multi-hop route.The two non-uniform clustering routing protocols EBUC and DEEUC are applied to the designed network model.Simulation experiments show that the DEEUC protocol achieves better non-uniform clustering effects than the EBUC protocol,balances energy consumption in the network,extends network life and network scalability are better.2)Aiming at the shortcomings of the DEEUC protocol applied to the designed network model,the M-DEEUC protocol adapted to the mine roadway wireless sensor network is proposed.The improvement idea of the M-DEEUC protocol is that since each stage of non-uniform clustering is not determined by a single energy factor or distance factor,comprehensive consideration of node residual energy,node density and related distance factors can effectively improve the non-uniform planning network Rationality.Compared with the DEEUC protocol,simulation experiments show that the improved protocol M-DEEUC has higher energy efficiency and longer network life.Therefore,M-DEEUC protocol is more suitable for application in mine wireless sensor networks.3)In order to solve the designed network model and the improved M-DEEUC protocol,the actual field deployment is not carried out,and the state change of the algorithm implementation cannot be visually represented,and there may be ambiguity and ambiguity.It is proposed to use Petri-net to establish the formal modeling of the M-DEEUC protocol,which intuitively reflects the non-uniform clustering state change process,and analyzes the model in mathematical theory to verify the reachability,boundedness,activity and invariance.The paper has 26 figures,6 tables,and 79 references. |
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