Design Of Wireless Fire Alarm And Emergency Evacuation System Based On ZigBee

With the speediness of China’s economy,modern buildings continue to emerge,and fire accidents are becoming more complicated.Traditional fire alarm system can not meet people’s increasing safety needs.In view of the complexity and frequency of fire accidents,under the background of the rapid development of Internet of things technology,computer and intelligent control technology,This article studies and designs a wireless fire alarm and emergency evacuation system based on ZigBee technology.First,design the controller and related circuits according to the ZigBee topology type and protocol framework,and build a wireless fire monitoring network for system signal transmission.Then,in accordance with the requirements of national standards,verify and adjust the compliance,functionality and coverage of the detectors,sound and light alarms,and manual alarms in the experiment center on the third floor of a college building,and combine the A-Star algorithm in this experiment On the basis of the center,a set of emergency evacuation indicator lights that can be linked with the fire signal is installed.Next,an adaptive software control system was developed based on the Lab VIEW program,and the corresponding function was achieved through the combination of the written program and the hardware function to meet the various requirements of the fire alarm and emergency evacuation system,and to achieve the construction of an intelligent system.Finally,the system is simulated and functionally tested according to relevant national standards and specifications.In the 20 experiments of temperature and smoke alarm experiments,the average alarm time of smoldering fire experiment is 2.01 s,and the longest time is 2.15s;the average in open flame experiment The alarm time is 2.16 s,and the longest time is 2.85s;in the manual alarm function test experiment,the average alarm response time is 0.96 s,the minimum is 0.63 s,and the maximum is 1.17s;in the wireless signal transmission distance test experiment,The communication network can ensure that the system receives a fire signal and sends out an alarm within 10 s,regardless of whether there is obstruction in a straight distance of 100m;the experiment and test results show that the alarm functionality of the system meets the requirements of the specification,and it is in the data transmission capacity test,Can also meet the long-distance data transmission under certain conditions,and basically achieve the expected function of the design.Although the system realizes the basic alarm and evacuation indication functions,and also has certain intelligent and wireless control functions,there are still areas that need to be optimized.Finally,this paper also expects some improvement directions and ideas,and looks forward to its development.