一种适用于视障人士的多传感器电子助行器

IF 0.7 Q4 REHABILITATION
A. M. Jubril, S. J. Samuel
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引用次数: 1

摘要

背景:识别视障者通路中的障碍物和坑洞受到了广泛关注。虽然在检测障碍物方面已经做了很多工作,但在电子助行器的设计中,在检测孔洞和脱落物方面还需要做更多的工作,尤其是那些价格合理且免提的设备。因此,本文考虑开发一种可穿戴电子助行器。方法:所开发的系统基于多传感器融合检测方法,该方法结合了三种技术,即:激光光源、相机和超声波传感器。一个产生红线的激光源被用来投射一条直线,这被摄像机捕捉到。红线在接触孔洞或直立障碍物时会发生不同的变形。然后提取变形模式用于障碍物和坑洞识别。当场景被极度照明时,激光的可见性会大大降低,因此这与边缘检测相辅相成。边缘检测使用边缘来识别孔洞和障碍物。这与超声波传感相结合,可以将障碍物的存在与孔洞的存在区分开来。检测结果和障碍物与盲人的距离通过音频提示进行转播。结果:与导杆相比,它的评估显示出更好的性能。碰撞率降低83.25%,跌落率降低84.62%,用户接受度良好。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
A multisensor electronic traveling aid for the visually impaired
BACKGROUND: Identifying obstacles and potholes in the pathway of the visually impaired have received much attention. While much has been done on the detection of obstacles, in the design of electronic mobility aids, much more is needed to be done on the detection of holes and drop-offs, especially those that are affordable and hands-free. This paper therefore considers the development of a wearable electronic mobility aid. METHODS: The developed system is based on the multisensor fusion approach of detection which combined three techniques, namely: a source of laser light, a camera and an ultrasonic sensor. A red line generating laser source is used to project a straight line and this is captured by the camera. The red line is deformed differently on coming in contact with holes or standing obstacles. The pattern of deformation is then extracted for obstacle and pothole recognition. The visibility of laser light is greatly reduced when the scene is extremely illuminated, so this is complemented with edge detection. The edge detection uses edges in the identification of holes and obstacles. This is combined with ultrasonic sensing, so that the presence of obstacles can be differentiated from that of holes. The outcome of detection and the distance of obstacles from the blind are relayed via an audio cue. REDULTS: Its evaluation showed better performance compared to the guide cane. It showed a reduction in collision rate by 83.25% and reduction in falling rate by 84.62%. The device received good acceptability from the users.
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来源期刊
Technology and Disability
Technology and Disability Medicine-Rehabilitation
CiteScore
1.40
自引率
20.00%
发文量
19
期刊介绍: Technology and Disability communicates knowledge about the field of assistive technology devices and services, within the context of the lives of end users - persons with disabilities and their family members. While the topics are technical in nature, the articles are written for broad comprehension despite the reader"s education or training. Technology and Disability"s contents cover research and development efforts, education and training programs, service and policy activities and consumer experiences. - The term Technology refers to assistive devices and services. - The term Disability refers to both permanent and temporary functional limitations experienced by people of any age within any circumstance.
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