The Layout Design Of Sensors For Geological Disaster Monitoring Based On GIS And Communication Technology

Geological disasters as the change of the earth’s surface normal activities, cannot be fundamentally and effectivelly governed, only through human technology for effective monitoring and early warning in time, in order to achieve the purpose of protecting personnel safety and reduce property loss. At this stage, the development of the Internet of things technology is gradually mature, and its application in the monitoring of geological disasters is also in-depth, and gets the good results in some areas. Communication technology is the the key link in the Internet of things, and is the only link between the Monitoring sensor of Internet of things and the server. Based on geological disaster monitoring of Internet of things technology and early warning, public mobile communication is becoming a main monitoring sensor data transmission link. But many geological hazards happened in the topographical condition more complex area, in these region, the mobile communication signal propagation is affected greatly by topographic elments, to emerge mobile communication signal weak coverage area and blind spots, the sensor placement that based on GIS and mobile communication technology can predict the signal coverage and signal strength, and it also can provide good decision for based on the networking of the geological disaster monitoring and early warning.Firstly, using the Cost231 Hata propagation of electromagnetic wave prediction model, digital elevation model (DEM) and GIS analysis methods to calculate public mobile communication signal propagation loss in the study area, getting the weak signal area and a signal coverage area. And analyzed the existing geological hazard point layout monitoring sensor could directly use the public mobile communication signal for data transmission.Secondly, according to the characteristics of geological disasters, proposed the basic principle of the sensor layout in geological disaster monitoring, which is based on geological disasters and disaster causing factor space distribution, and the principle of local network layout of sensor information to send and receive, and the convenient principle of remote sensor data transceiver communication.Finally, by means of public mobile communication signals as data transmission of eological disaster monitoring, when the public mobile communication signal is weak or meets the sgnal blind area, through establishing active or passive center relay station,put forward effective solution.