权益分类	功能权益	普通用户	{{item.name}}会员
{{category.name}}	{{benefitItem.name}}

Studies of Data-Carrier Technology Application for Assisting Environmental Information Ensuring for the Visually Impaired

辅助环境信息保障视障者的数据载体技术应用研究

基本信息

批准号：
18500700
负责人：
MIYAKAWA Masahiro
金额：
$ 2.66万
依托单位：
Tsukuba University of Technology
依托单位国家：
日本
项目类别：
Grant-in-Aid for Scientific Research (C)
财政年份：
2006
资助国家：
日本
起止时间：
2006 至 2007
项目状态：
已结题

项目摘要

RFID tags are of several useful features for assisting visual impairment. The aim of this research is to show the feasibility of such a system that works to assist the visually impaired by providing with environmental information according to the following approach: 1) we attach information to the surroundings by data-carriers (landmarking), and 2) we detect the changes of the surroundings by checking them by cruising robots.Firstly, we have considered several situations in getting environmental information for the visually impaired students in our campus, and then we have made experiments using RFIDs to solve them. Namely, we have attached RFID tags (both passive and active) to the surroundings, and experimented to read them either by the reader attached to cruising robots or by the receiver. As the result of the experiment, we have got a conclusion that it is possible to ensure environmental information by this approach.Next, we have considered of how we can cope with the following situation by using RFIDs: a visually impaired person confronts a difficulty under unexpected change of surroundings. Here, the most important problem is the localization of a signaling tag in the room. This problem is known to be hard even for the active RFIDs. We have devised the following approach to solve this problem: 1) we analyze the direction of the signal by rotating the coupled twin antennas, 2) we deploy anchoring tags in the room, 3) we use clustering of RSS (received signal strength) values by means of the Self Organizing Map (SOM), and 4) moving the robot, we iterate the localization procedure 1)-3) until we reach the target.

RFID标签具有用于辅助视觉障碍的若干有用特征。本研究的目的是展示这样一个系统的可行性，该系统通过根据以下方法提供环境信息来帮助视力受损者：1）我们通过数据载体将信息附加到周围环境中（地标），以及2）我们通过巡航机器人检查来检测周围环境的变化。首先，摘要针对视障学生在校园环境信息获取中的几种情况，我们进行了利用射频识别技术解决这些问题的实验。也就是说，我们将RFID标签（无源和有源）贴在周围环境中，并尝试通过连接到巡航机器人的阅读器或接收器读取它们。实验结果表明，通过这种方法可以确保环境信息。接下来，我们考虑了如何使用RFID来科普以下情况：视觉障碍者在环境发生意外变化时遇到困难。这里，最重要的问题是房间中的信令标签的定位。即使对于有源RFID，这个问题也很难解决。我们设计了以下方法来解决这个问题：1）我们通过旋转耦合的双天线来分析信号的方向，2）我们在房间中部署锚定标签，3）我们通过自组织映射（SOM）使用RSS（接收信号强度）值的聚类，以及4）移动机器人，我们重复定位过程1）-3）直到我们到达目标。