| In recent years,major logistics companies have been in constant lay out,and logistics warehouses have been blooming in large areas througho ut the country.However,because of the characteristics of logistics wareho uses,it is easy to lead to the occurrence of fire situation.How to guarante e the life safety of the trapped personnel more effectively in the case of fir e in logistics warehouse is the research hotspot now.Analysis of the existing Fire rescue emergency system found that all emergency systems can not confirm the location of the trapped personnel,the location of the rescue personnel is mostly the use of GPS positioning System,in the indoor environment there is a large error,let alone provide a reasonable and effective evacuation routine and effective path guidance.Aiming at the above problems,taking the logistics warehouse fire as the object,the mobile phone passive positioning system based on the base sta tion,the high temperature positioning system and the personnel evacuatio n system is designed.The main research contents include:1.Evacuation and Rescue System for Fire Personnel in Logistics Warehouse.According to the specific environment of fire in logistics warehouse,this system is composed of base station positioning subsystem,fire high temperature positioning subsystem,personnel evacuation and rescue path planning subsystem.It has passive location function of mobile phone,high temperature and high precision location function of warehouse fire and path planning function of rescuers and trapped persons.2.Passive location of mobile phone based on base station.According to the characteristics of LTE signal,a mobile phone passive positioning s ystem based on base station is designed,and the uplink signal emitted by mobile phone is sampled,and the cost code is related to the generated loc al code and mobile phone signal.Using the time-frequency information of mobile phone uplink signal to distinguish multi-cell phone,according to each detection station to cap ture the same mobile phone uplink signal times,the TDOA algorithm is u sed to calculate the location information of the trapped person.3.High temperature positioning.In the case of fire in the logistics w arehouse,the temperature and humidity in the room will change obviousl y.To explore the effect of temperature and humidity on fingerprint locatio n:with humidity unchanged,change indoor temperature,explore the effe ct of temperature on fingerprint location,with temperature unchanged,ch ange humidity,explore the effect of humidity on fingerprint location.The vector which has influence on fingerprint location is added to th e fingerprint vector,so that the location of the positioning system in the L ogistics warehouse still has high precision positioning ability,so as to bec ome the positioning system applied to the rescue personnel.4.Evacuation and rescue path planning.In the event of a fire in a log istics warehouse,the area can be divided into two parts,the evacuation no des and evacuation channels of the scene can be observed,as well as area s that are not in the monitoring state.For the evacuation nodes and evacuation channels that can be monitored,the optimal path is found by Ant colony algorithm,and for the area in the non-monitoring state,the path planning of each trapped person and rescue personnel is carried out through the Ant colony algorithm,and the enviro nmental information of the non-monitoring area is perfected continuously through the information interaction between the command center and the trapped personnel and rescuers. |
