The Design Of The Microwave Fire Detection System Based On ZigBee Technology

Along with our country economy and the city development and the trend of urbanization,the population in the city or town is in the rapid growth of population,high density,high utilization of land,leading to the city constantly appear a variety of high-rise buildings and the accumulation of large warehouse materials,in this case,once the fire,it is likely to cause a large area of the fire,but also bring great difficulty to the fire rescue work.Therefore,the automatic fire alarm system for the protection of personal safety and property safety is particularly important.At present,the detection technology at home and abroad fire is mainly by the high sensitivity infrared sensor and supplemented by smoke,temperature and other multisensor information fusion technology,however,for early fire covering fire and special material smokeless fire,the existing technology by using the above real time monitoring,fire detection is more difficult.Faced with this situation,the advantages of microwave radiation in the detection of fire are reflected and applied.The use of microwave detection fire has a unique advantage in penetrating,partition,partition door,window and other circumstances,the situation can be detected within the building,inform the firefighters fire state,so as to avoid the occurrence of some avoidable accidents,in the structure,detection of antenna with small volume is small,has good applicability.The internal structure of the design consideration of the building,on the base of ZigBee,designed a monitoring system,building fire in this way,not only can complete the monitoring of the fire inside the building,but also can be implemented on the platform of intelligent control,Home Furnishing air quality detection in the complex network.The main task of this project is:First of all,the design of antenna detection for the radiation frequency band of fire,a high gain dual frequency antenna is designed.Secondly,the general scheme of microwave fire detection is given.The CC2530 chip is chosen as the core to design the hardware circuit of the coordination node,routing node and terminal node.Finally,using the IAR software platform,we design the program of each node,andbuild a small mesh network based on ZigBee protocol stack.Through testing,detection of antenna bandwidth and gain in Bobbi,and meet the design requirements,the design of the mesh network can effectively realize the operation,transmission to the PC terminal node data effectively,achieve real-time detection and early warning,to remind the user of fire.