Wireless handheld portable navigation system and method for visually impaired pedestrians
Number of patents in Portfolio can not be more than 2000
United States of America Patent
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app pub date -
Jun 2, 2004
filing date -
Mar 20, 2002
priority date (Note) -
Abandoned
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Abstract
This invention relates to a system for orienting and guiding visually impaired pedestrians. The system combines a Global Positioning System (GPS) receiver to a dead reckoning unit that compensates for GPS imprecision and loss of signal. The system is highly portable: it is based on a handheld portable computing platform that communicates wirelessly with a self-powered strap containing the GPS receiver and the dead reckoning unit. The system also uses wireless protocols to receive additional orientation information from a remote location server or operator accessible through the internet. Additionally, a positioning algorithm for mapping the user near a street intersection is provided.
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