ZAPATO CON GPS PARA APOYAR LA AUTONOMÍA DE PERSONAS CON DISCAPACIDAD VISUAL (GPS SHOE TO SUPPORT THE AUTONOMY OF PEOPLE WITH VISUAL DISABILITIES)
Resumen
Este trabajo presenta un dispositivo electrónico diseñado para asistir la movilidad de personas invidentes y con discapacidad visual en entornos urbanos. Nuestra propuesta aprovecha las capacidades de computo ubicuo de los teléfonos inteligentes con GPS para posicionar y guiar a los usuarios a lo largo de espacios públicos. Las instrucciones de navegación necesarias para llegar a un destino se codifican como patrones de vibración que se transmiten al usuario a través de una interfaz táctil que se coloca en el zapato. Para evaluar su desempeño, se realizaron dos experimentos. En el primero se solicitó a un grupo de 20 participantes visualmente sanos que reconocieran y retroalimentaran sobre la información proporcionada por la interfaz táctil. Los resultados muestran tasas de reconocimiento por encima del 93%. En el segundo, el dispositivo fue evaluado por un usuario invidente. Los resultados sugieren que el dispositivo es capaz de incrementar la autonomía de los usuarios mismos que encuentran en este dispositivo una herramienta útil y fácil de utilizar.
Palabras Claves: Dispositivo usable, herramienta para la movilidad, interfaz táctil, navegación GPS, tecnologías de apoyo.
Abstract
This paper presents an electronic device conceived to assist the mobility of blind and visually impaired people in urban environments. Our proposal exploits the ubiquitous computing capabilities of GPS smartphones to position and guide users along public spaces. The instructions for space navigation are coded as vibrating patterns, which are tactually felt underfoot via an interface placed inside the shoe. To assess the performance of our device, two experiments were conducted. The first involved a group of 20 normally sighted participants, which were requested to report on the information provided by the tactile display. Success rates over 93% were obtained. For the second, a blind participant was requested to evaluate the device. Results suggest that the proposal can effectively increase the autonomy of users, which also find in the device a useful and easy to use tool.
Keywords: Assistive technology, mobility tool, GPS-based navigation, tactile display, wearable device.
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