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    • 7. 发明授权
    • Calibration techniques for an electronic compass in portable device
    • 便携式设备中电子罗盘的校准技术
    • US08370097B2
    • 2013-02-05
    • US12479182
    • 2009-06-05
    • Parin PatelRonald K. HuangPatrick S. PiemonteRobert Mayor
    • Parin PatelRonald K. HuangPatrick S. PiemonteRobert Mayor
    • G01C17/38
    • G01C17/38
    • Measurement data is collected from a magnetic sensor in a portable device, while the device is being carried by its end user and without requiring the end user to deliberately rotate or position the device while the output data is being collected. For example, the device may be held in the user's hand while walking or standing, or it may be fixed to the dashboard of an automobile or boat. Measurement data may also be collected from one or more positing, orientation or movement sensors. The collected measurement data from one or both of the magnetic sensor and the position, orientation or movement sensor is processed. In response, either a 2D compass calibration process or a 3D process is signaled to be performed. Other embodiments are also described and claimed.
    • 测量数据从便携式设备中的磁性传感器收集,同时该设备由其最终用户携带,而不需要最终用户在收集输出数据时故意旋转或定位设备。 例如,该装置可以在行走或站立时保持在用户的手中,或者可以将其固定在汽车或船的仪表板上。 也可以从一个或多个定位,取向或运动传感器收集测量数据。 从一个或两个磁传感器和位置,方向或运动传感器的收集的测量数据被处理。 作为响应,信号通知2D罗盘校准过程或3D处理。 还描述和要求保护其他实施例。