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1. 发明申请

US20150018018A1 Indoor Location-Finding using Magnetic Field Anomalies 有权
标题翻译：使用磁场异常的室内位置查找
公开(公告)号：US20150018018A1
公开(公告)日：2015-01-15
申请号：US13941002
申请日：2013-07-12
申请人： Microsoft Corporation
发明人： Guobin (Jacky) Shen , Chunshui Zhao , Feng Zhao
IPC分类号： H04W4/04
CPC分类号： H04W4/04 , G01C21/005 , G01C21/08 , G01C21/206
摘要： Techniques for indoor location-finding are described herein. Inside buildings, anomalies in the Earth's magnetic field may be caused by the buildings' structures. These anomalies tend to be location specific and temporally stable. Accordingly, a database or map may be constructed of field strength measurements, and made available to clients, either online (e.g., through cloud services) or offline. As a user carrying a portable device walks within a building, magnetic field measurements may be made. The measurements may be configured in as vectors and compared to the database. A specific location may be indicated by anomaly information seen in both the vector(s) and database. Optionally, techniques may be combined with a particle filter that may be operated step-by-step as the user moves within the building. In another option, fusion with Wi-Fi signals may be performed, such as with a two-pass bidirectional particle filtering.
摘要翻译：本文描述了用于室内定位的技术。在建筑物内，地球磁场的异常可能是建筑物的结构造成的。这些异常倾向于位置特定和时间上的稳定。因此，数据库或地图可以由场强测量构成，并且可以在线（例如，通过云服务）或离线使得客户端可用。当携带便携式设备的用户在建筑物内行进时，可以进行磁场测量。测量可以配置为向量并与数据库进行比较。特定位置可以由向量和数据库中的异常信息指示。可选地，技术可以与粒子滤波器组合，粒子滤波器可随着用户在建筑物内移动而逐步运行。在另一选择中，可以执行与Wi-Fi信号的融合，例如通过双向双向粒子滤波。

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