Indoor Magnetic Wayfinding For The Visually Impaired

专为视障人士设计的室内磁力寻路系统

• 批准号: 6883433
• 负责人: GARY D HAVEY
• 金额: $ 10.4万
• 依托单位: ADVANCED MEDICAL ELECTRONICS CORPORATION
• 依托单位国家: 美国
• 财政年份: 2005
• 资助国家: 美国
• 起止时间: 2005-06-01 至 2007-05-31
• 项目状态: 已结题
• 来源: https://reporter.nih.gov/project-details/6883433
• 关键词: bioengineering /biomedical engineering; biomedical equipment development; blind aid; clinical biomedical equipment; clinical research; human subject; magnetic field; miniature biomedical equipment; patient monitoring device; patient oriented research; vision disorders

Advanced Medical Electronics (AME) proposes the development of an indoor way-finding device utilizing the unique magnetic anomaly patterns that exist in modern, man-made structures. The proposed system will record the magnitude of magnetic field strength from sensors in three orthogonal axes. The time history of these magnetic data points can be continuously compared with an electronic map of magnetic anomalies (or, "signature") to determine current position within a building. Magnetic anomalies render a magnetic compass useless for finding a directional bearing. However, these same invisible anomalies represent valuable, unique indoor terrain features measurable by magnetic sensors located inside a small, portable device. Such a device would be able to provide low-vision users with a valuable indoor low-cost way-finding tool analogous to a Global Positioning System (GPS) device used outdoors.

Advanced Medical Electronics（AME）提出了利用现代人造结构中存在的独特磁异常模式的开发室内探望设备。提出的系统将记录三个正交轴中传感器的磁场强度的大小。这些磁性数据点的时间历史可以与磁异常（或“签名”）的电子图连续比较，以确定建筑物内的当前位置。磁异常使磁性指南针无用，可以找到定向轴承。但是，这些相同的无形异常代表了宝贵，独特的 室内地形特征可通过位于小型便携式设备内的磁性传感器来测量。这样的设备将能够为低视用户提供与全球定位系统（GPS）设备相似的有价值的室内低成本找到工具。