Mine Multimedia Emergency Communication System

Mine multimedia rescue communication has the paroxysmal of time, uncertainty of place, complicacy of condition and multiformity of information, which has more strict requirements. Mine multimedia rescue communication system adopts an integration of MPEG4, VOIP, TCP/IP and self-organizing technology etc. It is carried by the rescue workers, and the system adopts a cooperation method of wireless communication and wire communication to transmit information. The distance of transmission is 10~20 km. We adopt wireless self-organizing wirelike networks to connect the disaster scene and the underground base with 250 kbps velocity of propagation. A SDSL twisted-pair is used between the underground base and the ground center with 1.5 Mbps velocity of propagation. The facilities have the following function: Display, save and replay the audio-visual data of the entire rescue process; Achieve multi-user talk; Collect surroundings parameter of the mine including temperature, oxygen, CO and CH₄. All of the information could be provided for analyzing the cause of the disaster. In addition, the facilities can give an alarm when the parameters go beyond limited. The work time of the system can last for more than 8 hours. The pictures of practical video are given in the paper.