An electronic aid for a visually impaired person using an ultrasonic sensor

This paper presents an electronic device, called SmartWand, which can help a visually impaired person walk around more safely. Attached to a conventional white cane, the SmartWand detects obstacles that cannot be detected by a traditional cane and gives warnings in the forms of vibration or sound. In addition to obstacle detection, it also provides functions to detect colors of objects and the brightness of surroundings.