Takatori Norihiko, Nojima Kengo, Matsumoto Masashi, Yanashima Kenji, Magatani Kazushige
Department of Electrical Engineering, Tokai University, Japan.
Conf Proc IEEE Eng Med Biol Soc. 2006;2006:5181-4. doi: 10.1109/IEMBS.2006.260437.
There are about 300,000 visually impaired persons in Japan. Most of them are old persons and, cannot become skillful in using a white cane, even if they make effort to learn how to use a white cane. Therefore, some guiding system that supports the independent activities of the visually impaired are required. In this paper, we will describe about a developed white cane system that supports the independent walking of the visually impaired in the indoor space. This system is composed of colored navigation lines that include IC tags and an intelligent white cane that has a navigation computer. In our system colored navigation lines that are put on the floor of the target space from the start point to the destination and IC tags that are set at the landmark point are used for indication of the route to the destination. The white cane has a color sensor, an IC tag transceiver and a computer system that includes a voice processor. This white cane senses the navigation line that has target color by a color sensor. When a color sensor finds the target color, the white cane informs a white cane user that he/she is on the navigation line by vibration. So, only following this vibration, the user can reach the destination. However, at some landmark points, guidance is necessary. At these points, an IC tag is set under the navigation line. The cane makes communication with the tag and informs the user about the land mark pint by pre recorded voice. Ten normal subjects who were blindfolded were tested with our developed system. All of them could walk along navigation line. And the IC tag information system worked well. Therefore, we have concluded that our system will be a very valuable one to support activities of the visually impaired.
日本约有30万视力障碍者。其中大多数是老年人，即使努力学习如何使用白手杖，也难以熟练掌握。因此，需要一些支持视力障碍者独立活动的引导系统。在本文中，我们将介绍一种已开发的白手杖系统，该系统可支持视力障碍者在室内空间独立行走。该系统由包含IC标签的彩色导航线和带有导航计算机的智能白手杖组成。在我们的系统中，从起点到目的地设置在目标空间地面上的彩色导航线以及设置在地标点的IC标签用于指示前往目的地的路线。白手杖具有颜色传感器、IC标签收发器和包括语音处理器的计算机系统。这种白手杖通过颜色传感器感应具有目标颜色的导航线。当颜色传感器检测到目标颜色时，白手杖通过振动告知使用者其正位于导航线上。因此，使用者仅需跟随这种振动就能到达目的地。然而，在一些地标点，需要进行引导。在这些点上，导航线下设置有IC标签。手杖与标签进行通信，并通过预先录制的语音向使用者告知地标点。10名被蒙上眼睛的正常受试者使用我们开发的系统进行了测试。他们所有人都能沿着导航线行走。并且IC标签信息系统运行良好。因此，我们得出结论，我们的系统对于支持视力障碍者的活动将非常有价值。
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