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Radio Frequency Identification (RFID)

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ABSTRACT: According to World Health Organization (WHO) more than 285million people are blind who face constraints in moving independently indoors as well as outdoors. Usually they have been using white canes which cannot overcome obstacles and do not have specific knowledge to help users to find paths to reach their destinations. This system is designed to use wireless technology that would help a blind person navigate indoors. The proposed system embeds Radio Frequency Identification (RFID) tags on floor that can be read by an RFID reader which supports shortest path algorithm to ensure users to have a better and comfortable travel at the indoor environment. It also helps user to avoid obstacles using ultrasonic sensor. Direction guiding through voice commands is also implemented in this system after the user has given …show more content…

Wi-Fi and Bluetooth [1] based systems have been developed but they are not reliable enough due to interference of other devices with same technology. The Drishti system [2] consists of GPS based for outdoors and ultrasonic for indoors. The main problem with this system was the incorrect readings within tall buildings. The BLI-NAV system [3] has been developed which consists of GPS receiver and path finder use to determine shortest route to destination by audio guidance. User is also able to avoid obstacles. Real time results were better than the Drishti system with the same problem of error in measurements within the building though they were minimized. A system for firefighters [4] was proposed consisting of RFID and inertial sensor. When the firefighter moves, the inertial sensor records the movement of user hence, sending his location to RFID. But in this system 10-15% measurement error was calculated between waypoints moving from one tag to

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