Research And Design Of Location/Management System For Tunnel Personnel Based On RFID

With the rapid development of the city,more and more public transportation infrastructure projects such as subways and underground parking lots are being built and the scope of the project is gradually expanding.As a result,sudden accidents in all kinds of underground tunnels have caused personal safety problem of underground tunnel construction workers,which have also brought new challenges to emergency aid.Nowadays,How to minimize the accidents caused by the natural environment and man-made factors as well as how to quickly,accurately and efficiently find out the distribution of the basic information of the trapped persons and their locations in the construction environment such as subway tunnels are difficult problems for researchers to solve.It is a key point of current research to apply radio frequency identification(RFID)positioning technology with low cost,anti-pollution ability,long service life,rapid identification and other properties in subway tunnel construction environment.In this paper,under the background of the second phase project of the Subway Line 3which is under construction in our province,a set of RFID tunnel personnel positioning /management system based on RFID radio frequency identification technology is researched and analyzed after investigating the actual situation of the project.The system can manage basic personal information of the workers and important information of equipment assets in the project,it can also provide managers with a function that able to record the daily attendance status of each workers.When the accident occurs,the positioning / management system can quickly provide rescue workers with the basic information,distribution information and so on,of both person and the equipment in construction site,it will play an important role in timely handling of accidents.Firstly,the basic knowledge of RFID is outlined.According to the current popular network architecture,three layers of network models are selected.The overall planning and design of the system software is carried out,and the part of the database is analyzed,so that the appropriate database system is selected.Secondly,there may be interference between the target objects when the system is identifying and collecting data information,which can cause conflict or collision when data transmission is transmitted.Therefore,after studying the current commonly used anti-collision algorithms,aiming at the fact that these algorithms cannot meet the needs of the current system,a new anti-collision algorithm is proposed,and the feasibility of the improvedalgorithm is verified through simulation.The key point of the positioning system is the realization of the location algorithm.This paper points out some disadvantages after analyzing the commonly used indoor positioning algorithms and a new fusion positioning algorithm is proposed.Through simulation,the positioning system model of a scheme that can meet the current needs is determined.Relying on hardware devices,the system achieves the coarse positioning function;using some sampling points to simulate the actual data,the system verify the accurate positioning function through simulation.This scheme lays the foundation for further improvement,upgrading and improvement of the system in the future.At the end of this paper,the functional test of the design positioning/management system is carried out.The results of the test show that the system designed in this paper basically meets the actual requirements.