Application Research Of Wireless Sensor Networks In Mountain Hazards Monitoring Of Earthquake Area

Mountain hazards have become one of the worst disasters in variety of natural hazards. More than 15,000 Mountain hazards were induced by "5 ? 12 Wenchuan earthquake", economic losses caused by Mountain hazards accounted for one third of the earthquake total loss and the number of deaths had more than 2 million people. Therefore, effective monitoring for Mountain hazards of the earthquake area would be one of important measures to reduce economic losses and casualties. Currently, Mountain hazards monitoring for earthquake area are mostly taking manual way and monitoring instruments is relatively backward, the research of domestic and overseas is also relatively less. How to design mountainous hazards monitoring and warning system which having an efficient, stable and safe in earthquake area is the main content of this study.Wireless sensor network is self-organizing network which integrate a computer, microelectronics, networking and wireless communication technology, which has advantages such as low-cost, miniaturized, low power, large-scale, apply to the conditions of no man, it subjects to wide attention. These advantages also determines its has very broad application prospects and have important research value and practical significance in the military defense, agricultural and industrial control, environmental monitoring and forecasting, disaster relief, remote control in many dangerous areas and so on.Through personal observation in the area and understanding, features of mountain hazards in the earthquake area are recognized that has the distribution of a wide range, large-scale, endangering serious, long duration, spatial characteristics of clear and showed characteristics of chain growth, as well as mountain hazards monitoring network must have conditions such as wireless communication, low power consumption, an independent power supply, unattended, real-time, combined with the advantages of wireless sensor networks and applications, study vision which using wireless sensor network of mountain hazards monitoring in the earthquake area was put forward.This paper combined with the status of research which mountain hazards monitoring and wireless sensor network applications at home and abroad, it proposed a overall design program using wireless sensor network in the mountain hazards Monitoring of earthquake area, and the system involved in the hardware elements described in detail, such as nodes, base stations, and CC2430 radio transceiver chip, and analyzes its corresponding hardware circuit, operating principles and application in the system. At the same time the paper designed software architecture related to and modules process of data collection platforms and WEB remote browsing. In the process of mountain hazards monitoring for earthquake area using wireless sensor networks, location has played an important role. Through the study of radio signal attenuation model, based on the existence of error in the distance measurement of RSSI, and combined with the characteristics of mountain hazards in earthquake area, space localization algorithm of wireless sensor networks in mountain hazards monitoring of earthquake area was proposed, and also is a 3D locating algorithm based on combination of ERSS and RSSI-verify. The algorithm is low for hardware required, it can adapt to the requirements of environmental in mountain hazards monitoring for earthquake area, and also improved to a certain extent in the localization precision.Finally, Through the system of designing hardware and software for conducting systematic simulation experiments in a laboratory environment, the monitoring process which designed for this paper had been verified, and simulation experimental results were analyzed.