期刊名称：International Journal of Innovative Research in Computer and Communication Engineering
印刷版ISSN：2320-9798
电子版ISSN：2320-9801
出版年度：2015
卷号：3
期号：6
DOI：10.15680/ijircce.2015.0306149
出版社：S&S Publications
摘要：Pathfinder is a low cost outdoor assistive navigation system. This project use audible feedbacktechnology and for navigation, distance vectors are considered. This project demonstrates the ability to navigate a blind,based on audio which allows the user to move to a known location without the use of a visual aid. The system uses aportable computer, GPS, external memory and a central microcontroller module to generate sound based on thedirection that the user must turn in order to face the correct direction. This project is implemented using microcontrollerbased embedded system connected to GPS. GPS satellites which regularly circle the earth send out signals which theunit detects and quickly interprets. The system can be set to the navigation mode by the user by a keystroke. Thesystem then records the route data from the GPS at regular intervals. The device then stores this information to thesystem. The user can later replay route information. This helps the person to follow the exact route by getting theinformation from the stored voice data after comparing with the current GPS data, if the compared data is same as thepreviously stored location the system will give a message through ear phone using speech processing system otherwiseit will give a warning message. This project use speech recognition system, which is done by using two machinelearning techniques. They are Mel Frequency Cepstral Coefficients and k-means clustering. User gets feedback in theform of audio.
关键词：GPS Synthesized directional audio; audible feedback technology; Navigation system
