Research On Telecommunication Protocol And System Design For Coal Mine Security Real-time Monitor System Based On QoS

In resent years, accidents in coal mine happened frequently in our country, which obstructed its progress and also impacted greatly to people's life and belongings. In the past, the rough developing mode, lacking of network system in security information system which caused working security information in a mine can't be transmitted to a control center in time, are the root causes of these coal-mining accidents. Therefore, a complete security monitor system of a coal mine is urgent to be developed.According to the analysis of the requirement of a security real-time monitor system of a coal mine, this article presented the solution of a distributed monitor system based on B/S (Browser/Server). The monitor network has 3 levels:1. there is an intelligent terminal, which captures the security data in a mine and transmits up and out of the mine. Meanwhile, the terminal also has the functions to alarm when gas overflows and to block the gas. Then the wireless network in the mine is made of an intelligent terminal, which acts as AP (Access Point), and a portable data collector based on RFID technology. The wired network and wireless network in the mine construct a multi-dimensional data collection system.2. Just outside the mine there is a server, which brings the network in the mine to the internet.3. The ground control center, which consists of the client terminal and background database, monitors the while mine.The paper's emphasis is the telecommunication protocol based on the QoS (Quality of Service) in the coal mine's security real-time monitor system. Relied on the analysis of the system communication data characteristic, network structure and other bus advantage, we construct the networks using improved RS-485. By studying the colliding and avoiding, frame structure design, priority setting, error control and verification technology, we improve the quality of the network communication, and satisfy a coal mine real-time monitor system application on system security, reliability and real-time.The system involved Z8F6423, Z8F042A, eZ80F91 MCU from ZiLOG for the intelligent terminal in the mine, the portable data collector and sever outside the mine. All the coal mine security real-time monitor system solution and part of the hardware and software have been completed in this paper.