Vol. 166, Issue 3, March 2014, pp. 73-79

Abstract: Wireless Sensor Networks (WSN) adopt GHz as their communication carrier, and it has been found that GHz carrier attenuation model in transmission path is associated with vegetation water content. In this paper, based on RSSI mechanism of WSN nodes we formed vegetation dehydration sensors. Through relationships between vegetation water content and carrier attenuation, we perceived forest vegetation water content variations and early fire gestation process, and established algorithms of early forest fires detection. Experiments confirm that wireless sensor networks can accurately perceive vegetation dehydration events and forest fire events. Simulation results show that, WSN dehydration perception channel (P2P) representing 75 % amounts of carrier channel or more, it can meet the detection requirements, which presented a new algorithm of early forest fire detection.

Keywords: Wireless sensor network (WSN), GHz electromagnetic wave, Attenuation model of vegetation, forest fire, Perception channel, Detection algorithm.

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