Ecological Solutions For The Blind
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A number of inappropriate navigation devices have been foisted onto the visually impaired population over the past twenty years. These portable electronic devices are usually mounted on a long cane adaptation, or hand-held by the visually impaired user. Their function is primarily to help prevent a collision with an obstacle in the immediate path. Some of these navigation devices use laser technology to gauge subject-to-object distance. Others use infrared transceivers or ultrasonic pulse-echo techniques to locate and warn of obstacles. Some extend their role beyond giving warning signals, to crudely assisting the user map the immediate path ahead. These devices exhibit a number of problems, the most significant of which are related to the interface display that conveys navigation/obstacle warning information to the blind user. As sound is often used in these displays, the vital auditory channel is typically compromised. The author has produced a solution, which is at an early stage of development. Several successful prototypes using tactile displays, have been produced.
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Calder, David (2009)Assistive technology devices for the blind are portable electronic devices that are either hand-held or wornby the visually impaired user, to warn of obstacles ahead. Many assistive technology devices use ultrasonic ...
Davies, N.; Friday, A.; Newman, Peter; Rutlidge, S.; Storz, O. (2009)An increasing trend in mobile and pervasive computing is the augmentation of everyday public spaces with local computation - leading to so called smart environments. However, there are no well accepted techniques for ...
Calder, David (2009)Top end assistive technology devices for the visually impaired, are sophisticated electronic devices that are either hand-held, attached to a Long Cane or worn by the visually impaired user, to warn of obstacles ahead. ...