Based WSN Debris Flow Disaster Warning Data Acquisition And Sleep Mechanism Design

Wireless sensor networks (Wireless Sensor Network, WSN) have broadapplication prospects in medical, military battlefield, environmental monitoring, smarthome is one of the fastest growing network. Node energy provided by the fixed batteryshould not be replaced, for the study of the WSN in energy-saving measures is hot anddifficult. Debris flow monitoring system is also one of the scenarios WSN, due to thecomplexity of its environment, wired-based facilities is difficult to implement WSNtechnology for monitoring regional data collection and analysis, can be predicted inadvance of geological disasters, reducing personnel casualties and material damage.Debris flow monitoring and warning system to study the energy-savingtechnologies in system design, reducing sensor nodes energy consumption andprolonging life of the network.First, we analyze the debris early warning data acquisition, differentinterface-driven design, to reach the sensor nodes to properly capture the purpose ofmonitoring the regional data. By defining generic packets, packaged sensor node datatransmission.Secondly, in order to save energy, the sensor nodes collect data typically used is atiming acquisition mode, and the timing cycle is generally fixed, so the paper proposes anode adaptive cycle adjusting sleep policy. To get the best time of the acquisition by thetiming cycle of the dynamic changes in the sensor nodes, little change in collecting datato an appropriate extension of the sleep cycle, reduce regular sleep cycle when the datachanges fast. Node in reducing about70%the amount of acquisition at the same time beable to complete collected raw data value by MATLAB software simulation, to achievereal-time monitoring of the monitoring area.Finally, in order to achieve the sleep function of routing nodes, this paper designedS-DMAC protocol, which based on child node routing node dormancy strategies, in order to achieve energy saving of routing node. Nodes alternate dormant strategy is adoptedin DMAC agreement, so it can have very small transmission delay when it transmits data, and reduce the node energy consumption at the same time. But its running period is f ixed, nodes without data receiving and sending time point receiving state duration is longer. The S-DMAC add listening state at the receiving stage, if there is no data to send and receive at time point nodes directly go into the sleep mode, at the same time the routing based on child nodes report the timing cycle point dormancy strategies, reduce unnecessary energy consumption of nodes. Through NS2simulation software, the improved node has better energy efficiency, end-to-end delay and data packet loss rate, prolong the network life.