The Research Of Indoor Navigation System Based On RFID For The Visually Impaired

RFID Technology is a popular technique developed in recent years,which makes full use of Space Coupling Technology.In the coupled channel,energy transmission and data exchange are depending on timing relationship.At present,the RFID application field is gradually expanding.Furthermore,RFID is not only used on the fixed device but also is applied on some portable devices On the other hand,as the rapid development of society,the rights and interests of disabled people have gradually become the public concern.Because more than 95%information is obtained by the visual,how to safe walking for those who are living in the dark is becoming the biggest problem.Therefore,this thesis designs a Indoor Navigation System based on RFID technology for the visually impaired.This system is running on the smart phone platform,which not only can acquire the distance information of the obstacle and terrain,but also can provide much more information for the blind by the multimedia function on the smart phone platformFirstly,this thesis introduces the current state of indoor navigation system based on RFID for the visually impaired.It also introduces the concept,history and current RFID application.Besides,the thesis analyzes the RFID compositions,the protocols and standards of the tag,the RFID working principle and the running platform -Symbian OS.Secondly,this thesis designed the architecture and flow of Indoor Navigation System Based on RFID for Visually Impaired.The thesis also analyzes system software and hardware choosing,including the choice of working frequency,the available hardware interface,the protocols and properties of ??tag.Then it discusses about the testing and running platform based on the human-computer interaction platform.For the aspect of software design,the proposed system retrieves data by RFID technique,communicates through the Serial Service of Bluetooth module,design a parser to parses the XML document by Symbian OS API,and then outputs the instruction through the Symbian OS MMF.Finally,this thesis employs a simulation tests to prove the accuracy,flexibility,stability and real-time of the system.