Newly developed walking apparatus for identification of obstructions by visually impaired people

被引:17
|
作者
Okayasu, Mitsuhiro [1 ]
机构
[1] Akita Prefectural Univ, Dept Machine Intelligence & Syst Engn, Yurihonjo City, Akita 0150055, Japan
基金
日本科学技术振兴机构;
关键词
Visually impaired person; Walking apparatus; Ultrasonic sensor; Infrared sensor; White cane;
D O I
10.1007/s12206-010-0332-5
中图分类号
TH [机械、仪表工业];
学科分类号
0802 ;
摘要
In this work, two visual systems to help visually impaired people walk were developed: the first is a white cane with a non-contact detection system, and the second is a three-dimensional (3D) visual system. In place of the sense of sight, the sense of touch, either via vibration or of pins, can relay information on objects and obstacles around people. In a white cane non-contact detection system, two sets of ultrasonic sensors and vibrators, respectively, are employed to indicate the positions of both low- and high-level obstructions in front of the visually impaired person. When objects are detected by the sensor, the vibrator is strongly activated. In this system, the range of obstruction detection can be adjusted between 0.5 m and 5.5 m. By comparison, the 3D visual system uses two different components, an infrared camera sensor to detect obstructions and a tooling apparatus, incorporating a number of 1 mm diameter pins, by which their 3D shapes are derived. The pins are arranged in a 10x10 matrix and move longitudinally between the retracted and extended positions based on the depth data between the infrared sensor and the obstruction. Pins are elongated individually, so that each pin tip represents a specific area of the outer surface of the object. This tactile 3D image can provide effective object information.
引用
收藏
页码:1261 / 1264
页数:4
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