Design And Implementation Of The Automatic Fire Alarm System Based On The Wireless Network

With the rapid development of technology and economy in China,various industries developing at top speed has brought convenience to people's material life.Current fire prevention measures,technical implementation of related systems and urban construction progress can not adapt to the rapid growth of population and building density growth rate in today's society,which may lead to a huge loss of personnel and property in case of fire.Considering the deployment of existing traditional fire early warning system,the existing data correlation and the problem of docking with traditional fire alarm control platform,this thesis aims to build a set of new wireless automatic fire alarm system.The system is divided into wireless fire detector,wireless fire alarm controller and wireless fire alarm control software platform.Data connection is realized through wireless mode between each part.Wireless fire detector and wireless fire alarm are transmitted in the form of Zig Bee module.Zig Bee CC2430 and CC2440 hardware chip are selected as transceiver module.According to the general structure of wireless fire alarm system and wireless interconnection mode based on Zig Bee technology,the interconnection among fire detector and the interconnection between fire detecto r and fire alarm controller are based upon UDP protocol while the interconnection between fire alarm controller and system software control platform adopts TCP protocol.In order to improve the timeliness and reliability of the operation for wireless fire alarm system,the system designs and implements the instant message sending mode based on link state routing algorithm aiming at alarm information.It selects the shortest effective path to send alarm information to fire alarm controller and system softwar e platform in the least time under the circumstance of ensuring the least hardware and network resources consumption;Meanwhile,the system has higher requirements for fault handling.In order to ensure the effective operation of fire detector,timely dete ct and deal with fire detector at fault,the system designs and implements a heartbeat failure detection method based on voting,which can detect the operation state of fire detector in real time,carry out fast self-repair,ensure normal operation and reduce the risk of misjudgment and missed judgment for fire when fire detector breaks down.The wireless automatic fire alarm system researched in this thesis has realized the relevant algorithm and function module of fire warning sensor data recognition,storage and fusion processing.A wireless fire warning system with fast feedback and processing ability is constructed to meet the actual needs of fire treatment,improve the efficiency of fire fighting and reduce the huge losses caused by fire spreading because of risk warning lag.