Route Guidance For Blind People Using GSM & GPS Modems

his paper presents a smart electronic aid for blind people. The proposed system uses and ultrasonic sensor for detecting the obstacles in the path.GSM, GPS modules were used to locate the blind.


Artificial Vision is the most important part of human physiology as 83% of information human
being gets from the environment is via sight. The statistics by the World Health Organization (WHO)
in 2011 estimates that there are 285 billion people in world with visual impairment, 39 billion of
people which are blind and 246 with low vision. The oldest and traditional mobility aids for persons
with visual impairments are the walking cane (also called white cane or stick) and guide dogs. The
drawbacks of these aids are range of motion and very little Information conveyed. With the rapid
advances of modern technology, both in hardware and software front have brought potential to
provide intelligent navigation capabilities. Recently there has been a lot of Electronic Travel Aids
(ETA) [1] designed and devised to help the blind people to navigate safely and independently. Also
high-end technological solutions have been introduced recently to help blind persons navigate independently. To identify the position and orientation and location of the blind person any of
those solutions rely on Global Positioning System (GPS) technology. Such systems are suitable for
outdoor navigation, due to the need for line of sight access to the satellites, they need additional
components to improve on the resolution and proximity detection to prevent collision of the blind
persons with other objects and hence subject his/her life to danger. However in comparison with
other technologies many blind guidance systems use ultrasound because of its immunity to the
environmental noise. Another reason why ultrasonic is popular is this technology is relatively
inexpensive, and also the ultrasound emitters and detectors are small enough to be carried without the
need for complex circuitry. Apart from the conventional navigation systems, a blind aid system can be provided a new dimension of Realtime assistance and artificial vision along with dedicated obstacle detection circuitry. These different units are discussed to implement the design of a ‘Smart stick’ for blind.

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