Study On Detecting System Of Firemen's Physical Features And Environmental Conditions On The Scene Of Fire

With the rapid development of our national socioeconomic conditions and the rising living standard,while configuration of urban building is becoming more and more complex,rate of fires and resulting threat on people's safety as well as on socioeconomic are also increasing remarkably.High frequency and severity of fires pose a more and more demanding task for firemen.When confronted by dense fog,high temperature and darkness and the like,rate of successful rescue is relatively low due to the fact that our technology and equipment are not advanced and practical enough.Hence,it is of great importance to develop an effective and reliable fire detecting system according to different fire circumstances,so as to increase our rate of successful rescue and protect the life and property of firemen and the public.As it is hard to obtain real-time integrated information,firemen are subjected to high risk.This essay introduces a detecting system of firemen's physical features and environmental parameters.This system is composed of upper computer and lower computer.The lower computer with sensor and STM32 controller is installed in fireman's waistcoat and the upper computer is responsible for receiving and analyzing the data.After physical information like oxygen concentration in the blood,body temperature and pulse is collected by sensor,the STM32(A)controller sends the information to transfer station STM32(B)by Bluetooth.Meanwhile,environmental information such as temperature,fog density and concentration of carbon monoxide is collected by STM32(B).At last,collected physical and environmental information are sent to the upper computer through WIFI.This essay designs hardware circuit in the bottom of the system and tests each module of the hardware circuit.The hardware circuit is made up of host module,communication module,sensor module and monitor module.The system involves the acquisition and transmission of multi-data.The specially designed data link layer protocols contribute markedly to the performance of the system.The upper managing computer is designed with Visual Studio 2010 to accomplish analyzing of the data and show the real-time physical and environmental information on command platform in home front.The software system of upper computer involves user login interface and function module interface.Data stored in the database at the same time,through the comparative analysis of data,to establish the security early warning model based on BP neural network,using the data fusion algorithm will be collected sensor data fusion after firefighters to predict the safety status of rescue.To judge whether the fireman is in a safe state or in a dangerous state,the actual value of the output is compared with the expected value,and the error meets the system requirements.Test and verification of each module of the system after practical use indicate the detecting system of physical and environmental parameters can work effectively.After analysis of source of measuring errors and comparison of polynomial interpolation and piecewise linear interpolation,solutions to hardware and software are proposed and finally piecewise linear interpolation is chosen to correct non-linear errors.The system combines software,hardware technology,internet technology and ARM,providing effective technology to guarantee life safety of firemen and achieve joint rescue of command crew,as well as contributing a lot to increasing rate of successful rescue and declining casualties.