Research On Metro Fire Automatic Alarm System Based On WSN

With the increase of population and the improvement of people's living standard in China,fire accidents caused by electricity load or some human causes occur frequently in public areas with dense population and limited space such as subway vehicles,station public areas,equipment areas and rail transit areas.Because of the uncertainty of the time and location of fires in the area,they are often difficult to detect in the early stages.Once the fire develops too fast,it will cause serious casualties and economic losses,while the existing fire alarm system has many shortcomings.Therefore,it is very important to design a set of automatic fire alarm system suitable for urban rail transit.In this paper,through the analysis of automatic fire alarm technology development trends at home and abroad,aiming at the problems existing in the urban rail transit,using wireless transmission technology,embedded technology,sensor technology and analytical processing technology,design a set of high integration,powerful function,the automatic fire alarm system of the remote monitoring and warning.The system is divided into three parts:data acquisition layer,data transmission layer and data analysis layer.In the data acquisition layer,various functional modules with CC2530 controller as the core are integrated to complete some information perception acquisition of public transportation environment.In the data transmission layer,the data transmission between the data acquisition layer and the data analysis layer is completed through wireless transmission.In the data,analysis layer,fuzzy comprehensive evaluation theory and link state routing and other methods are used.Meanwhile,through the detection software developed by this system,the functions of display,storage,alarm and management of monitoring data are completed,and automatic fire alarm is completed.Finally,the system is tested and the test results are consistent with the theoretical analysis results.The automatic fire alarm system based on WSN plays a great role in the overall safety of urban road traffic.It can collect the surrounding humidity,temperature and smoke in real time,effectively guaranteeing people's travel safety.Compared with the traditional detection system,the system has a unique advantage in the application field and has a broad application prospect.