An indoor navigation system to support the visually impaired
An indoor navigation system to support the visually impaired
复制标题
为视障人士提供支持的室内导航系统
DOI：
10.1109/iembs.2008.4650195
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发表时间：
2008
期刊：
影响因子：
--
通讯作者：
Nicholas A. Giudice
中科院分区：
文献类型：
--
作者：
T. Riehle;P. Lichter;Nicholas A. Giudice
需要室内导航技术来支持视障人士的无缝移动。提供当前位置、关于室内环境的有用上下文寻路信息和到目的地的方向的小型便携式个人导航装置将极大地改善具有低视力的人的访问和独立性。本文介绍了这样一个设备，它利用商业超宽带（UWB）资产跟踪系统，以支持实时定位和导航信息的建设。进行了人体试验，以评估该系统的有效性，通过比较使用导航系统进行实时指导的蒙眼受试者和仅接收当地周围环境的语音信息但没有路线指导信息（类似于长手杖或导盲犬）的蒙眼受试者之间的目标寻找性能。还运行了正常的视觉控制条件。在每次试验中测量行驶的时间和距离，并在目标完成后进行回溯测试以评估认知地图的发展。在三种条件下，在时间和行驶距离方面观察到统计学显著差异;导航系统和视觉条件产生最佳结果，导航系统显著优于非引导条件。
Indoor navigation technology is needed to support seamless mobility for the visually impaired. A small portable personal navigation device that provides current position, useful contextual wayfinding information about the indoor environment and directions to a destination would greatly improve access and independence for people with low vision. This paper describes the construction of such a device which utilizes a commercial Ultra-Wideband (UWB) asset tracking system to support real-time location and navigation information. Human trials were conducted to assess the efficacy of the system by comparing target-finding performance between blindfolded subjects using the navigation system for real-time guidance, and blindfolded subjects who only received speech information about their local surrounds but no route guidance information (similar to that available from a long cane or guide dog). A normal vision control condition was also run. The time and distance traveled was measured in each trial and a point-back test was performed after goal completion to assess cognitive map development. Statistically significant differences were observed between the three conditions in time and distance traveled; with the navigation system and the visual condition yielding the best results, and the navigation system dramatically outperforming the non-guided condition.