Design And Simulation Of Fireman’s Indoor Positioning System Based On Location Fingerprint

With the continuous improvement of human urbanization and industrialization,the internal structure of various buildings has become increasingly complex.A variety of combustible materials decoration and storage of goods types and quantity is also increasing,greatly increasing the fire load of the building.In the case of disaster,such as fire or earthquake,the complexity of the structure inside the building and the uncertainty of stored materials often bring great difficulties to the rescue work,and even repeatedly threaten the safety of the rescue workers.In recent years,all kinds of fatal accidents caused by fire or geological disasters have occurred from time to time.Fire rescue personnel as fighting in the front line of the combatants,how to ensure their own safety in the premise of the implementation of the rescue,its position,status,and other information for the commander is crucial.On the basis of comparing many positioning methods,in view of the characteristics of indoor positioning and the limitations of fire rescue conditions,the paper determined to adopt wi-fi signals for positioning,and use the location fingerprint-based positioning algorithm to achieve the research goal.The main idea of this research is to utilize the multipath effect of wi-fi signal in the indoor complex environment to realize dynamic fingerprint matching and location positioning for firefighters.But because in a real fire rescue environment,collection location fingerprint need for spatial modeling under test,using the point collection method for fingerprint database was established,and any position of RSS(received signal strength)fingerprint due to multipath effects or affected by factors such as environment mutation,its value is the real time change,so need long time many times on a single point measurement,not only the realistic environment is hard to do,and for expensive cost and time cost increase greatly.Considering the above factors,this paper adopts MATLAB simulation design system tofocus on the matching of fingerprint algorithm,the realization of positioning function,precision analysis and algorithm improvement.The attenuation model of RSS signal is used to establish the simulation fingerprint database.The parameters are selected and the indoor target positioning is realized.Through system simulation,it is proved that the research and design of the indoor positioning system of firefighters based on location fingerprint achieves the design purpose,making the operation of commanders and firefighters more simple,convenient and easy to analyze.