Implementación de un prototipo electrónico basado en tarjetas de desarrollo para el desplazamiento, lectura de texto impreso y localización de personas con discapacidad visual.

Abstract

In the present titling work, an electronic prototype was implemented based on development cards for the displacement, reading of printed text and location of people with visual impairment in order to provide a solution to the problems faced by this social group. To implement it, we opted for the use of two reduced board computers Raspberry Pi 3, an ultrasonic sensor, a camera, a GPS module NEO-6M and a Sim800L module, all strategically distributed in a bib that allows greater portability and comfort for the person who use. The device can detect obstacles at the height of the abdomen, read transcribed texts, send a distress message with its location and announce the hours and minutes in which it is. Different types of tests were performed for each functionality, in the case of obstacle detection the results obtained indicate that the person will be alerted by a beep on those objects that are located at a distance greater than 15 cm and less than 90 cm. For the reader it was determined that the text to be read should preferably be transcribed on a sheet of 14.9 cm x 21 cm, be in the letter Calibri with a size of 24 and a distance of the chest between 20 cm and 30 cm. In the location system, good results were achieved with respect to the difference of distances between the points obtained by the GPS and those given in Google Maps, in the worst case the difference was 15.5 m, which does not have a great significance since it would not be difficult to find the user. Finally it is recommended to develop more technologies and support systems that help visual impaired people to be included in the society in a better way.