Safety problem has been one of the major issues in coal mining process. Therefore, a perfect mine safety monitoring system is necessary. It is one of the important aspects of a safety monitoring system how to acquire the exact position information real-timely of staff underground coal mines. To solve the problem of how to acquire of miners position, based on coal mine structure characteristics, with Zigbee technology, a kind of position system of underground coal mines is designed in the paper, and the efficiency of mine safety monitoring system can be improved greatly.
Satellite-based is a very complex system, including of many subsystems involving space, channel, ground, command and so on. The simulation system must rely on the joint co-simulation. Based on HLA (High-Level Architecture) system standard, from the perspective of distributed simulation, a simple satellite design schema was introduced in this article, which can achieve a joint multi-system co-simulation.
On the analysis of the development situation of the ETC home and abroad, CC2431 wireless location function is used in the high speed highway ETC system to realize data transmission between network centre node and terminal node safely, Record passing information of the vehicle terminal by the wireless data transmission between the coordinator and vehicle terminal. A weighted centroid position algorithm is introduced to meet the position accuracy. The test results of the wireless communication between vehicle terminal and coordinator show that CC2431 wireless position system can realize vehicle omnibearing position and real time monitor in the super-speed highway.
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