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1. 发明授权

US07451549B1 Automatic calibration of a three-axis magnetic compass 有权
标题翻译：自动校准三轴磁罗经
公开(公告)号：US07451549B1
公开(公告)日：2008-11-18
申请号：US11502593
申请日：2006-08-09
申请人： Raj Sodhi , Jay Prunty , George Hsu , Becky Oh
发明人： Raj Sodhi , Jay Prunty , George Hsu , Becky Oh
IPC分类号： G01C17/38
CPC分类号： G01C17/38
摘要： A magnetic compass apparatus and method to account for magnetic distortion while determining a magnetic heading is disclosed. The method enables a compass module, comprising at least two magnetometers, to characterize its magnetic environment dynamically, while collecting data of a geomagnetic field; a user moves an apparatus through various orientations; the environment may or may not contain magnetic distortion influences. Data gathered by magnetometers and, optionally, accelerometers are processed through at least two filters before being transferred as a processed data set for repetitive measurement calculations. A series of calculations is executed recursively in time by solving one or more linear vector equations using processed data.
摘要翻译：公开了一种在确定磁道时考虑磁畸变的磁罗盘装置和方法。该方法使得包括至少两个磁力计的罗盘模块能够在收集地磁场的数据的同时动态地表征其磁环境; 用户通过各种取向移动装置; 环境可能包含或可能不包含磁变形影响。由磁力计和可选的加速度计收集的数据通过至少两个滤波器进行处理，然后作为重复测量计算的处理数据集进行传输。通过使用处理的数据求解一个或多个线性向量方程，一系列计算在时间上递归地执行。

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