Monitoring And Alarm System Of Coal Mine Gas Based On Ethernet

Coal is accounting for more than70percent of the total energy in our country, it is an important basic energy and material. However, the trend of Coal mine production security is not fine. Lots of coal—gas explosions occour occasionally in our country. How to prevent the occurrence of gas disaster and safeguard the coal minesafety production has been the important subject which is our study. Therefore, a coal mine gas monitoring and alarm system with high-reliability, high—stability plays all important role in coal mine safety production. With the development of Ethernet technology and embedded technology, traditional coal mine safety monitoring and alarm systems are facing challenges. How to monitor alarm system access Ethernet, Ethernet remote monitoring the hot spots of the world are studying the field of automated monitoring. Specific to the reality of our country, and how to find more practical significance suitable for China’s coal mine safety production monitoring system based on Ethernet. Papers in this context, do the following study of coal mine safety monitoring systembased on Ethernet.First, the article describes the coal mine monitoring system involves technology:Ethernet, RS485technology and so on. Nonlinearity error approximate linear output curve exists for of carrier catalytic gas sensor accuracy low,a function of the input-output relationship in a catalytic gas sensors, and a function applied to the gas collected in the monitoring system to improve the accuracy of the data collected using the least squares method. At this stage at home and abroad by analyzing the advantages and disadvantages of various embedded Ethernet, raised the overall design of coal mine safety production monitoring system based on Ethernet. The program uses a ring network architecture design, embedded TCP/IP protocol as the core of the monitoring system as a whole, to overcome the communication protocol is not compatible with each other and other shortcomings, solve the problems of the currently existing cable communication monitoring system lightning. The system has a strong practicality, and easy integration with the ground remote management network. Secondly, a detailed description and analysis of hardware and software design of the various modules of the system of monitoring equipment. The hardware design chosen as the main control chip C8051F020-based high-speed8051microcontroller core. The frequency of high-speed processing, the controller’s performance to a new level. The monitoring system, audible and visual alarm display integration. Power failure protection measures in a coal mine under the backup power supply module. All the hardware design are designed in accordance with the requirements of the intrinsically safe circuits. All the hardware was designed according to the national standard of the essence-safety type circuits of China(GB3836.4-83). The chapter uses Subjects MJC4/2.9J Carrier Catalytic Element.concluding experimental data and data analysis, and analysis of the feasibility of the application of the monitoring equipment.Finally, the sub-station of the system software and PC monitoring system. The sub-station is the ZLG developed a embedded network Ethernet to serial module ZNE-100, It integrates the TCP/IP protocol stack, users take advantage of the network functionality of embedded devices, it can be easy to complete form a network communication system for downhole equipment, and success with Ethernet interconnect. Introducting PC monitoring system briefly, the monitoring interface as well as the design code.