Design And Implementation Of The Mine Safety Monitoring System

China is abundant in coal resources, and the coal production is increasing year by year. The coal resources play an important role in our country’s energy structure. But the coal is mainly mined from the underground mines with complex geological conditions, low degree of automation and high frequency of accidents. The safety of coal mines concerns the sustained and healthy development of China’s coal industry. Therefore, in order to reduce the accidents of mine production and improve the rescue efficiency, it is significant to establish a set of mine safety monitoring system for monitoring the mine production.Currently, most of the coal mines have been equipped with safety monitoring systems. But these systems generally have sole functions and low data transmission rate. Using regional location, most of these systems are unable to ascertain the miner’s direction of movement and exact position. It is not conductive to the management of safety production. Focusing on the problems, this paper has designed a set of mine safety monitoring system which has the functions of high communication rate, environmental parameters monitoring and personnel positioning to improve the level of mine safety production.First, according to the problem of low transmission rate existing in the mine monitoring systems at present, we use LPC2460 processor which based on ARM7 architecture as the main control chip to design a multifunctional underground monitoring substation of mine. Using RTL8019 AS Ethernet controller as the network module, the substation can achieve high communication rate between the mine and the ground management system through TCP/IP protocol. In order to achieve long distance transmission of frequency type sensor signal, Hex inverting Schmitt-trigger is used to process the input frequency signal. The substation uses LCD screen to display the monitoring parameters in real time.As the personnel positioning of the monitoring system is not accurate, this paper proposes a weighted centroid localization algorithm based on filtering. The algorithm not only concerns how to reduce the influence of the environment on the accuracy of location, but also uses the characteristics of mobile personnel to realize tracking and positioning of underground personnel. Simulation results show that the algorithm can attain a high positioning accuracy. Based on the simulation results, we design a card for personnel location and identification. We implement the personnel positioning algorithm in the identification card. Studies show that the algorithm can realize the tracking and positioning of mobile personnel better.Experimental verification shows that the mine safety monitoring system designed in this paper can effectively realize the accurate positioning of miners and real-time monitoring of environmental parameters. And the system is able to achieve high communication rate between the mine substation and the ground management system.