The Design And Application Of ZigBee Wireless Sensor Network For Fire Detection System

The fire has become one of the disasters people need to face all over the world.In the event of a fire,it will not only affect the personal safety in the public and result in serious economic losses,but also influence the development of society.Therefore,the development of fire detection technology is very important.In the past,there was a linear type of fire system and the sensor types were relatively single,and the error of the fire detection occurred.In this paper,it uses a variety of sensors to detect fire parameters,transmits the data to the control center by wireless,and determines the occurrence of fire by integrated sensor data,which will further improve the accuracy of the system.In this paper,we use ZigBee wireless sensor network technology to realize data transmission and forwarding in fire detection system.And a detailed analysis is made on the ZigBee network topology,the node type,and the Z-Stack algorithm stack.And then,we study the ZigBee address,routing and node communication performances,at last,we design the overall structure of fire detection network.The fire detection system is designed from two aspects.At first the aspect is the hardware part of the system,the system uses the most mainstream CC2530 chip as the core processor of the ZigBee node,and each node carries smoke sensor MQ2,carbon monoxide sensor MQ7 and DS18B20 temperature sensor,the sensors will transmit surrounding physical environment parameters to the data we need.The second is the software part of the system,In this paper,the ZigBee wireless sensor network is developed by using the Z-stack protocol stack of TI company.The key of research and realization of three kinds of sensors is to obtain the parameters of the surrounding environment,PC application software development and utilization is VS2010 development environment,which can receive the coordinator node through the serial transmission of data and real-time display of the four geographical locations,smoke concentration,CO concentration,and temperature information.The software can also be used to complete the query function of historical data,so the application software provides a good human-computer interaction platform for the system.After the whole development of the system,the whole fire detection system is tested on the ZigBee network such as data transmission,fire monitoring,and node communication performance.Finally using NS2 network simulator study of wireless sensor network routing algorithm,and proposed an improved routing algorithm,the improved algorithm first eliminate the energy does not meet the requirements of the forwarding nodes,and then combined with the residual energy node,designs the buffer queue length and the hop node forwarding RREQ delay,and according to the earliest return RREP to determine the path of data forwarding,the simulation experiment,this paper from the time delay,packet delivery ratio and residual energy of nodes are three aspects to verify the effectiveness of the improved algorithm.