Character Trainer Aid for the Blind by Using Sensor Fusion
Hideto Ide, Masafumi Uchida and Mina Terauchi*
Aoyama Gakuin University, 6-16-1 Chitosedai, Setagaya-ku, Tokyo, 157 Japan
* The Polytechnic University, 4-1-1 Hashimoto-dai, Sagamihara, Kanagawa, 229 Japan
In this investigation, we studied the utility of electric or mechanical stimuli as visual substitutes. we used mechanical and electric stimuli to present characters and colors, respectively. For the reduction of learning time and the increase of recognition rate, we devised an apparatus which is connected to a microcomputer and can present Japanese sentences including Chinese characters, with a 10 × 10 array of 100 vibrators. Color recognition is achieved by using electric stimuli. Electric stimuli were given with two Ag-AgCI electrodes attached to the root of a middle finger. Along pulse (feeling warm) stands for red, a short pulse (feeling cold) stands for blue, and a sequence of 10 pulses per second (feeling like a twitter) stands for green. The current value was 200μA. In this investigation, we examined 25 subjects. The recognition rate was 100% for the three colors (red, blue and green).
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