| Autors: Karastoyanov, D., Yatchev, I. S., Balabozov, I. S. Title: Innovative graphical braille screen for visually impaired people Keywords: Braille screen; Linear electromagnetic microdrive; Visually Abstract: The graphical interfaces based on visual representation and direct manipulation of objects made the adequate use of computers quite difficult for people with reduced sight. Within the European Union, the problem with the access of blind people to computer resources is quite pressing. A new type graphical Braille screen is developed. The Braille screen is a matrix with linear electromagnetic micro drives and non magnetic needles, passing trough the axes of the electromagnets. Over the electromagnets is mounted a grid with holes. The needles go through the holes and move up pimples. The visually impaired peoples feel them tactile way and can adopt symbols and graphics. Permanent magnet linear actuator intended for driving a needle in Braille screen has been proposed and optimized. Finite element analysis, response surface methodology and design of experiments have been employed for the optimization. References Issue
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Вид: пленарен доклад в международен форум, публикация в реферирано издание, индексирана в Scopus
