Design Of Intelligent Navigation System Based On RFID And GPS

With the rapid development of tourism,,the existing artificial tour guides can not meet the needs of consumers.Now most tourists choose to use multiple apps in smart phones to complete the positioning and navigation in the scenic spot,which is inconvenient to switch,and the scenic spot managers cannot intervene,it is unable to locate tourists in time in case of dangerous situation.On the other hand,when GPS navigation is indoors,the positioning is inaccurate and the function of explanation cannot be realized,the simple indoor positioning cannot be displayed on the same platform as the positioning provided by GPS,which leads to the problem that the indoor and outdoor positioning cannot be integrated.In order to improve the intelligent and human-oriented service of the scenic spot,this paper proposes an intelligent navigation system based on GPS and RFID technology and using wechat applet as user terminals.This paper designs an intelligent navigation system,which is divided into three parts: intelligent navigation positioning subsystem network,wechat applet,Sina App Engine and database.Aiming at the inaccuracy of GPS indoor positioning,an intelligent navigation positioning subsystem is designed,which uses STM32F103 chip with Cortex-M3 core as the controller,and carries the UHF RFID chip R2000.It realizes the indoor positioning of tourists by identifying the electronic label position in the hands of tourists,and completes the connection between hardware and server through sim868 module with GPRS function.In order to solve the problem that the single algorithm is not accurate,the intelligent navigation subsystem network uses a hybrid algorithm based on TDOA and RSSI to locate the electronic labels in real time.Because this algorithm uses at least three readers to locate the electronic labels,this paper uses can communication to connect the four intelligent navigation subsystems to form a network.In view of the single function of many mobile app,wechat app is used as the terminal.Its main functions are: tourists bind electronic tags to realize one-to-one,scenic spot location summary and navigation,positioning the current location and indoor exhibits explanation,etc.In order to solve the data transmission between the intelligent navigation positioning subsystem and the wechat applet,Sina cloud is used as the Internet of things server,new applications are built in the cloud server,and then corresponding codes are written in the cloud application to realize the data transmission between the hardware,the applet and the Internet of things server.At the same time,MySQL is used to build a database in the server to manage the tourist information.Finally,the performance of each part of the system is tested through a series of experiments,including indoor positioning accuracy,visitor login and binding,server data transmission,etc.The experimental results show that the design of the system has good indoor positioning accuracy,and can accurately display various functions to tourists in the wechat small program end,with good practicability.