I. Overview
The energy issue has always been the top priority of all countries. As a coal mining enterprise that directly mines coal, the safety production requirements of the enterprise have become higher and higher in recent years, and the establishment of a coal mine gas monitoring and monitoring system is one of the means to ensure its safe production. With the development of computer and network systems, the safety production management departments at all levels have implemented digital remote monitoring and networking of coal mines in order to timely and accurately grasp the safety production status of each coal mine. It is necessary to establish a remote networked county (company) level platform and implement networking with the provincial level platform. The computer used in the monitoring system has high technical performance requirements, which are mainly reflected in the following aspects:
1. Ensure long-term uninterrupted start-up.
2. According to the different situations and environmental conditions of coal mining enterprises (most of them are distributed in remote ravines and mountain beams, with large dust and large environmental temperature difference), the computer performance is required to be stable and reliable.
3. After networking with county (company) and provincial platforms, stable data and fast transmission speed are required.
Combined with the above situation, the use of industrial computer in the monitoring and control system can meet and meet its requirements.
2. System structure
The configuration of the industrial computer is as follows:
IPC-810/7271/6113LP4/FSC-1613VN/PIII866/256M/40G/CD-ROM/EVOC keyboard and mouse
3. System principle:
The industrial computer is supplemented by monitoring and monitoring software and various monitoring equipment to form a complete monitoring and monitoring system, which implements real-time monitoring and monitoring of harmful gases and electrical equipment in mines. In recent years, domestic manufacturers have become more and more mature in the development of measurement and control software and measurement and control equipment. The general principles are as follows:
Use monitoring software to form a monitoring interface on an industrial computer. The downhole gas probe uses the principle of thermal catalysis to measure the gas concentration. When the gas mixture in the environment enters the gas cavity due to diffusion, it reacts with the sensitive element, causing the internal resistance of the sensitive element to change. If the circuit voltage is constant, the voltage at the center point on the side of the component arm of the Wheatstone bridge will change, and an electrical signal will be output. The electrical signal reflects the gas concentration in the mixed gas in the environment at this time. The intelligent signal is sent to the single-chip microcomputer for data processing and display, and the data communication is realized through the substation, the ground central control station and the computer. When the gas concentration is greater than or equal to 1%, the ground computer system will issue a voice alarm. When the gas concentration is greater than or equal to 1.5% and less than 0.5%, the power-off and power-feeding functions will be realized, providing data and status display for the ground monitoring room and the upper-level local area network, so as to ensure the safety of decisive disposal. Make decisions based on hidden dangers to ensure safe production.
4. Market trends
There are currently 120,000 coal mining enterprises in my country. As far as our province is concerned, there are more than 2,000 licensed mines and mines that are applying for safety production licenses. All of them must install and use monitoring and monitoring systems as required, and realize remote digital networking. The high-performance industrial computer and high-quality service are undoubtedly not only a big business opportunity, but also can contribute to the safe production of enterprises. Its economic and social benefits are encouraging. In the industry competition, as long as we do better than others , most of its market share belongs to us, and the corporate culture will also be developed and sublimated.
