Braille learning is essential to communicate and work for visually impaired people (VI). However, a convenient and portable Braille learning device has not been investigated. Herein, a convenient and high-accuracy Braille learning-enabled tactile sensing system is developed to help VI learning Braille themselves. The tactile sensing system based on tailored micropatterned tactile sensor through sliding mode on Braille, which is bio-inspired by human touching sensation. It achieved a high recognition accuracy of 98.96% for 26 English letters for Braille. The tactile sensor with a tiny size (3 mm×3 mm×2 mm) exhibited a high sensitivity of 0.11 kPa−1, which is based on two micro-dome structures with the same dimension as the dot on Braille. The tactile sensing device is fabricated by the tailored sensor, process circuit and microprogrammed control unit to recognize Braille; the sensing device can help VI learning and writing Braille. This work presents a practical theory for VI learning Braille themselves.
Wang et al. (Fri,) studied this question.