Traditional mine underground information platforms often build related independent information systems based on a certain requirement (such as video surveillance, man-machine positioning, voice communication, environmental measurement and control, underground automatic equipment measurement and control, etc.), and the system construction technology platform, data protocol and interface specifications Unable to unify, the system cannot be linked, and integration is difficult. Most of them cannot meet the comprehensive data sharing and decision support of the mining industry, the group, and the government authorities for the production process of the mining industry, nor can they meet the safety management needs of the mining industry. At present, the underground data transmission network mostly uses wired transmission. According to the characteristics of continuous mining in the mine, the wired network is difficult to deploy quickly and mobile deployment. The production management department cannot immediately understand the first-line information and cannot provide the first-line production, security and scheduling. Effective support. With the deepening of digital mines, there is an urgent need to establish a digital mine management support platform based on the Internet of Things, to form a platform that can provide immediate and comprehensive data sharing and operational decision support for all production management and safety management links that reflect the front-line production site. The goal of this project is to complete a comprehensive information system for mine safety and risk avoidance based on the Internet of Things, so that it can use the advanced nature of the Internet of Things technology to provide a unified management and decision support platform for mine safety management and production process control. Through the storage and analysis of various types of data in the overall mine, the ultimate realization and provision of personnel vehicle positioning management, IP dispatching command system, underground intelligent traffic signal control system, emergency evacuation broadcast system, environmental monitoring and monitoring system, production process control system, mine virtual Realistic system and other industrial control applications, establish the Internet of Things application standardization and data transmission protocol and interface specifications in the mining industry. Construction needs Personnel (vehicle) positioning: to achieve accurate and continuous positioning of the main production area and the main transportation lanes and main ventilation lanes under the mine; to achieve accurate and continuous positioning of underground traffic vehicles; Voice communication: to achieve wired voice communication at fixed points underground, to achieve full coverage of WIFI in the main production area, to achieve underground wireless communication; Dispatching command: realize voice and SMS dispatching of underground personnel and voice dispatching of underground vehicles; Video surveillance: Realize underground fixed digital video surveillance, underground WIFI coverage area mobile video collection; Online monitoring of production environment: to achieve online monitoring and monitoring of environmental parameters such as carbon monoxide and wind speed at fixed locations, and to realize wireless real-time online monitoring of handheld devices of underground safety personnel; Traffic signal control for ramps: underground traffic signal control system for ramps; Scalable applications: Ventilation automation systems, drainage automation systems, power supply automation systems, equipment status monitoring and monitoring, rail transportation letter collection and closing systems, etc. system structure The comprehensive information system of underground safety and risk avoidance based on the Internet of Things technology is industrial Ethernet ring network technology, zigbee wireless positioning wireless data transmission technology, WIFI wireless communication technology, VOIP voice communication technology, geographic information system technology, management information system technology and database technology, etc. The integrated information platform, which is integrated in many aspects, will realize the comprehensive perception of mine enterprises and the visual control, automation, and information management of mine production dispatching and command, and realize the connection of the Internet of things-perception of the mine. The system is mainly composed of several subsystems of industrial network subsystem, man-machine positioning subsystem, communication and communication subsystem, and monitoring and monitoring subsystem. Industrial Network Subsystem Combining with the actual situation of the mine, the entire system uses a network communication subsystem with multi-technology integration, which includes several main parts: industrial Ethernet ring network, wireless horizontal communication subsystem, and wireless integrated substation. Industrial Ethernet Ring Network As the core network of the entire mine, the industrial Ethernet ring network carries large-volume data transmission of all industrial automation, video monitoring, man-machine positioning, environmental monitoring and other data of the mine, as shown in (Figure 1). . The layout of the industrial Ethernet ring network meets the following design conditions. 1. The industrial Ethernet ring network should meet the gigabit data bandwidth, meet the data transmission requirements of various underground applications, and reserve sufficient capacity expansion margin; 2. Cover all important hubs and mechanical and electrical equipment such as lifting systems, horse head gates in the middle of production, fan houses, substations in mining areas, explosives depots, pump rooms (combined with the surface production system to form an Ethernet network in the whole mining industry); 3. Reserve the interface to meet the needs of future expansion and expansion; Description of the trend of industrial Ethernet ring network: The underground industrial Ethernet ring network is deployed with a double ring network architecture. Wireless horizontal communication subsystem For the horizontal main alleys and ramp roads in the middle of production, wireless comprehensive substations are used for coverage, and a substation is placed every few meters to achieve WIFI and zigbee dual wireless network coverage, as shown in (Figure 3). The wireless horizontal communication system uses internationally leading wireless technology, and the wireless substation uses the latest WIFI wireless technology and a zigbee positioning module. Because the product has two optical fiber modules, the entire wireless backbone core network adopts a "back-to-back" two-layer transparent relay method to form a mixed wired and wireless horizontal communication link with high bandwidth, small system delay, and stable wireless operation. The backbone link can withstand various applications such as environment acquisition, personnel positioning, voice communication, and video surveillance. The characteristics of the wireless substation network are: stable and high-speed wireless links made by transparent transmitters; perfect redundant design; seamless roaming of wireless mobile phones; use of special polarized antennas; synchronous NTP self-maintenance mechanism; dynamic TDD (time division Duplex); two-way dynamic adaptive modulation; adjustable ACK delay (ACK TImeout); OFDM technology. Wireless integrated substation self-healing ring technology: the wireless base station supports automatic detection and switching of the loop, both ends of the wireless link or multiple segments are connected to the industrial fiber Ethernet ring network that has been built in the mining area, and the wireless link forms a ring with the industrial fiber Ethernet network Or tangent ring, when a faulty node occurs in the wireless link, the system can immediately switch the link direction to ensure that the system business is not interrupted. Each device of the entire wireless link can be used as an optical fiber access point to ensure the effective and reliable operation of the system, and The business is not affected in any way during system maintenance. Stope network access: (This part is a bit strange, isn't it using wireless network, why do you need to use copper wire and other access?) For the network access of the stope, it is considered that the stope mining cycle is short, the environment is complex, and it is easy to scratch. If the optical cable access scheme is adopted, the equipment investment is large, the construction period is long, the maintenance is difficult, and it cannot be recycled. This system adopts the copper wire access method for the stope network access. Option 1: If only personnel (equipment) positioning is implemented in the stope, the CAN bus communication method is used, and two copper wires are used to connect the positioner in series to the stope. Option two: If comprehensive applications such as video, voice communication, broadcasting, positioning, emergency alarm, and CO monitoring are required in the stope, the ADSL telephone line method is used to cooperate with the intelligent terminal in the mine to realize stope access. Rainproof Tongchai Diesel Generator Mini Portable Generator,Rainproof Tongchai Diesel Generator,Tongchai Rainproof Generator,Tongchai Rainproof Diesel Generator Jiangsu Lingyu Generator CO.,LTD , https://www.lygenset.com