Zigbee-based Smart Building Fire Alarm System Research

The building in city became more and more large. It lead the building fire damage more people’s life and property. In the imburse of Science and Technology Commission of Shanghai "capacity building about wireless sensing and control services of chemical equipments"(11DZ2290500), this project aimed to research a high reliability intelligent building fire alarm system.The fire alarm system of this issue consists of master controller, router and fire detector nodes. They using ZigBee wireless sensor network to complete the data transfer between the layers. The fire alarm system using complex fire detectors to detect the unstructured and complex objects. They detect smoke density, temperature and CO density. Include3sensors. Established fire information fusion system based on fuzzy neural network algorithm. Using the algorithm to made the fire determination based on fire data. To avoid false alarm and missing alarm phenomena and conserve battery power, the fire alarm system using a new query plan. On the one hand the fire detector transmits the fire date to controller immediately while the file is detected. On the other hand, the fire detector transmits wireless devices running status to controller regularly.This system has completed the acquisition test of smoke signals and wireless transmission test between nodes. According to the experimental results, this paper determined the arranged of system detects nodes in the building. The research results show that the data acquisition of the system is stable and reliable. It can meet the requirements of the monitoring systems.