Total Blindness Case Study

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ABSTRACT– Total Blindness is defined as ― complete lack of form and visual light perception, recorded clinically as No Light Perception (NLP) [Cole brander, 2002]. Total blindness can affect quality of life, reducing the comfort and viable opportunities that normal sighted or even visually impaired people have. As a result, totally blind people need greater reliance on affordable, effective, and convenient technology; through which they can lead a more comfortable and active life. Improving access to these technologies will ensure that totally blind people can access similar, if not same, opportunities as people with normal vision. However the majority of corresponding devices could not give ability to recognize 3-D object faces blind from …show more content…
Its main job is to determine the 3D mapping of object for blind people to make him knows the shape of the object from such as downward staircases or road curbs and detects objects at or above waist level up, down, different sides, fixed or moving to assist navigation of blind persons. Our system robustly detects and warns users, easy and safe to use, and cheap system.
The proposed system includes wearable T-shirt that includes different ultra-sonic sensors and very small vibrating motors to measure the distance between the blind and the object from different sides and then after some calculations it formulate a decisions that translate it to vibrations to assist blind to know shape of the object and sense it [4], [5]..
The blind Aid T-shirt divided into three smart levels; top level, Intermediate level, and bottom
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This level helps blind to formulate information for the upper obstacles by sending the triggered pulse signal to hit the obstacle then senses the pulse return. The time delay between sending and returning pulse is proportional to the distance of the object from the sensor. The middle level fixed at the top of front wearable T-shirt includes three Ultra Sonic sensors, and three Vibration Motors. This level helps blind to recognize obstacles near immediate level in which it uses the same function mentioned above in the top level, but using the three ULTRA SONIC sensors to cover the directions of any object from different sides

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