Research On Location Of Harmful Gas Source Based On Wireless Sensing Technology

In the field of environmental safety monitoring and research,accurately monitoring the concentration of harmful gases in the environment and timely knowing the location of the gas leakage not only help to save lives,but also provide reliable basis for subsequent leakage and rescue work and save economic input,which is of great importance Safety and economic value.At present,with the rapid development of computer science,wireless communication and sensor technology,the application of wireless sensing technology is becoming more and more in-depth.With the unique advantages of wireless sensor networks in deployment,networking and fast data transmission,the monitoring and early warning of target areas can be carried out conveniently and continuously.Currently,the monitoring and treatment of harmful gas sources in the target area based on wireless sensing technology is currently a hot research topic.However,it is a technical difficulty that the target location needs to be quickly and accurately located for the monitoring environment with a variety of changes.This paper studies how to set up a system for locating harmful gas sources based on wireless sensing technology to solve the difficult problem of quickly and accurately locating perceptual targets under the background of gas environment safety monitoring.The main contributions of this paper include the following two points:1.In the indoor application environment,a target localization method based on RSSI ranging is adopted.In the ranging stage,the parameters of RSSI ranging model are corrected in real time according to the recorded real distance between beacons and the RSSI attenuation value to achieve the real-time accurate ranging.In the positioning phase,the maximum likelihood estimation algorithm is used to determine Of the initial position of the moving target,increase the intelligent optimization step to find the optimal solution,to improve the ultimate goal of positioning accuracy.2.In the outdoor application environment based on the best path matching DV-Hop improved method to determine the target location.In the step of distance estimation,we propose to select the best inter-beacon path through the strategy of path similarity parameter to approximate the path between unknown nodes and beacons,so as to improve the accuracy of distance estimation.In the position calculation step,using the original Lateration algorithm Based on the initial position of the target point,an improved particle swarm optimization algorithm is added to achieve the goal of improving the final target positioning accuracy.Theoretical analysis and simulation results show that the research results in this paper can provide optimized method selection and strategy guidance for the localization of harmful gas sources based on wireless sensing technology,and have good practical value and application prospect.