本科毕业设计-煤矿环境定位检测系统--外文翻译

附录 A 外文文献A Coal Mine Environmental Monitor System with Localization I.RESEARCH STATUSAs an important energy, coal plays a pivotal role in the economic development. Coal mine monitoring system, is the important guarantee for coal mine safety and high efficiency production. In order to ensure the safe operation, the installation of environment monitoring node in tunnels to real-time detection is very important. However, commonly used traditional monitoring node wired connection to obtain communication with the control system, this node exist wiring difficulties, expensive and other shortcomings. In contrast, wireless sensor node can be easily with current mine monitoring network connection, and good compatibility, facilitate constituted mine gas monitoring network, to suit various size of mine applications. Since wireless nodes are battery powered, so completely out of the shackles of the cable, shorten the construction period can be arranged at any time where the need to use.The Zigbee wireless communication technology is used in this coal mine environmental monitor system. This is a new short-range, low complexity, low power, low data rate, low-cost two-way wireless communication technology. Now, wireless sensor network product based on Zigbee technology are quantity and variety, but the real product can be applied in underground environments of special sensor node is very few. The sensor node that we designed in the system is truly able to apply to in-well environment, it through the wireless sensor node security certification. At the same time, due to the special nature of the wireless network is that it can spread the wireless signal, we can easily locate staff for coal mine safety monitoring provi...