The Design And Implementation Of Data Terminal And Sensor Network Gateway Of Mesh Emergency Network In Mine

ABSTRACT:Our country is a major coal-producing country in the world, the demand for coal is very large. But in recent years, the high incidence of coal mine accidents,not only pose a threat to the safety of miners, but also affect the country’s coal mining work; What’s more, the research of underground rescue communications technology is very weak, and downhole equipment used in disaster relief is very backward.Therefore a modern, underground wireless video, voice, environmental monitoring network rescue system is inevitable to build.With the development of information technology, there have been many new wireless network technology, including Wireless Mesh Network, which use wireless multi-hop technology. With the high-bandwidth and high reliability, Wireless Mesh Network is known as the next-generation wireless network. In the complex environment of coal mine, Wireless Mesh Network can be guaranteed to communicate reliably at the time of the occurrence of coal mine, which provides a reliable platform in the underground communication rescue.This paper rely on the National Science and Technology Support Program "The equipment research and development of prevention and control of coal mine water inrush, fire and other major accidents"(SQ2012BAJY3504). With the analysis of downhole relief systems, build business models and logical structure of underground communication network based Mesh relief system.Then complete the design and development of downhole wireless data terminal subsystem, and with the help of the terminal,the sensor network can be connected with the mesh network. The specific work of this paper is presented as follows:1.According to the business needs of data terminals, design the software and hardware systems for the terminal. Choose ARM9architecture as the main control chip hardware platform,and the Linux-based operating system as the software platform; transplant VIA Solomon VT6656wireless LAN module to ensure the terminal to access to the mesh network successfully.2.Develop the application software of the terminal, and integrate the underground emergency alarm, short messaging, device control and sensor network interconnection into together; using multi-threading technology to achieve concurrent execution of multiple tasks, and ultimately develop a application software to meet the needs.3.Develop the sensor networks gateway to ensure the interconnection with the mesh network, and design the hardware of the sensor node.The software consists of two parts:the coordinator side software and data terminal side software, then complete the software.4.Test the performance of the wireless data terminals and sensor network gateway.