Improvement of an electronic aid for the blind using ultrasonic and acceleration sensors

Title
Improvement of an electronic aid for the blind using ultrasonic and acceleration sensors
Authors
김래현박세형이수용조현철하성도
Keywords
시각장애인; 장애물검출; 초음파센서; 흰지팡이; 스마트원드; Visually Impaired People; Obstacle detection; Ultrasonic sensor; White cane; SmartWand
Issue Date
2009-04
Publisher
정보과학회논문지, 소프트웨어 및 응용; Journal of KISS : software and applications.
Citation
VOL 36, NO 4, 291-297
Abstract
This paper introduces an electronic travel aid, named SmartWand, which detects obstacles using a ultrasonic sensor. In addition to obstacle detection, the SmartWand senses color information of objects and the environmental brightness. It is designed to be attached to a ordinary white cane in order to detect the obstacles at head-hight which cannot be covered by the cane. We have improved the first version of the SmartWand based on a user evaluation. The second version is much lighter and smaller than the previous one. It has been enhanced by two new functions. The SmartWand eliminates impact errors due to tapping the ground using a moving average filtering algorithm and restricts the detection range to the path in the moving direction using an acceleration sensor. We have tested these functions in various environments to determine the parameters for these functions.
URI
http://pubs.kist.re.kr/handle/201004/35216
ISSN
1229-6848
Appears in Collections:
KIST Publication > Article
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