Coal Mine Safety Wireless Monitoring System Based On Wireless Sensor Networks

In recent years, with the development of micro-electro-mechanism system (MEMS), wireless communication technology and digital electronic technology, a lot of new methods dealing with obtaining and processing information appear, the wireless sensor network (WSN) is one of them. The wireless sensor network is a research branch of wireless Ad hoc network, it was born in military and extend to civil fields. The wireless sensor network usually be send to the goal area by being put artificially or being launched by rocket。The nodes in WSN make up the network rapidly by self-organizing, operate in the abominable and even dangerous environment that people can't be close to, monitor the environment in time.As we know, the nature condition of underground coal mine are very complex and diverse. This increases the degree of insecurity in the course of mine exploitation and often leads to disasters. At present, the situation of safe production of coal mine is very serious in our country, and coal mime disasters occur frequently in recent years which bring about huge loss of treasures and life. Because the existing coal mine security monitoring system has a lot of disadvantages, which lead to satisfy the strict requirement of monitoring, it is desired to improve the existing security monitoring system.With this research and application background, this thesis first proposes a coal mine integrated security monitoring system based WSN, establishes a security monitoring system layered model for different monitor requirement, and analyzes the different layers of the model. Next, the thesis introduces the two-tired network structure of WSN. Finally, according the topology of the WSN, we propose a feasible topology generation algorithm, explain the topology generation course of the WSN and topology maintain course of the WSN in the condition of topology variety, analyze and simulate the time of WSN's topology generation.