The proposed Guidecane system assist the visually challenging people to navigate in an indoor environment to give prior knowledge and avoidance of obstacle during navigation .The existing guidecane added with the light weight kit Guidebot. The Guidebot has an ultrasonic sensors and microphones to detect obstacles. Obstacle avoidance algorithm in PIC 18F4550/4555 microcontroller process the data observed in the microphone and finds the difference in logic low and high states of the ultrasonic sensor and produces a vibration in the handle of the guidecane for effective navigation. The human body is responsive to the environment. We use sight, sound, touch, taste and smell to sense our environment. We use speech and other sounds, along with movement, to display an output. Many computer scientists have had the ambition to create a computer that can interact with the environment as well as a human can. Some of these humanoids can sense the environment better than humans can -they hear sounds beyond normal range, have 'super' vision even in the dark, or perhaps feel subtle temperature changes.
[...] The foundation of any orientation and navigation system for the blind is an accurate determination of the user's position and the location of objects within his environment. This is also the reason why most available systems have weaknesses or even fail. About of the human population is visually impaired, and amongst them about 10% is fully blind. One of the consequences of being visually impaired is the limitations in mobility. Mobility is a vital key to personal independence and vocational success. [...]
[...] 6.Conclusion In this paper, Intelligent system to assist the blind and visually impaired people have been proposed. Different Sounds ( two wheeler , four wheeler ) were captured using a capturing device like microphone which is stored in a .WAV file format. This sound file is then sampled using a sampling rate. Using Fast Fourier Transform the frequency and amplitude of the sound file is plotted. When the user approaches an obstacle, vibrating motors attached to GuideCane produces suitable vibration. [...]
[...] Design of such system is quite expensive and becomes complex for audio processing. Different Sounds ( two wheeler , four wheeler ) were captured using a capturing device like microphone which is stored in a .WAV file format. This sound file is then sampled using a sampling rate. Using Fast Fourier Transform the frequency and amplitude of the sound file is plotted as shown in figure 2 and 3. Frequency and amplitude analysis of various sound file resulted in a slight variation in frequency range. [...]
[...] As blind people grow older their hearing range decreases and Human-Robot interaction is not possible .For outdoor navigation several systems have been proposed 5].They share common characteristics with indoor navigation systems and often rely on technologies that are not available in indoor environments - for example by using GPS for tracking. System has been designed to work like our ears[6] inorder to recognize sounds produced from vechiles in outdoor. Our two ears and the head which is between them is more than just a nice-looking way to design a human. [...]
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