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1. 发明授权

US08566032B2 Methods and applications for altitude measurement and fusion of user context detection with elevation motion for personal navigation systems 有权
标题翻译：用于人身导航系统的用户上下文检测与高程运动的高度测量和融合的方法和应用
公开(公告)号：US08566032B2
公开(公告)日：2013-10-22
申请号：US12609582
申请日：2009-10-30
申请人： Mahesh Chowdhary , Arun Kumar , Manish Sharma , Ashutosh Pande , Mahaveer Jain , Gagan Narula , Chinmay Agarwal , Kolin Paul
发明人： Mahesh Chowdhary , Arun Kumar , Manish Sharma , Ashutosh Pande , Mahaveer Jain , Gagan Narula , Chinmay Agarwal , Kolin Paul
IPC分类号： G01C21/00
CPC分类号： G01C21/005 , G01C21/20 , G01S19/49
摘要： Methods and apparatuses for estimating a user's altitude with respect to the mean sea level are provided. According to some aspects, the present invention is able to estimate altitude in both open sky as well as in degraded GPS signal environments such as dense urban canyon environments where GPS performance is affected by fewer available satellites and/or multipath error. According to other aspects, the present invention uses data from a pressure sensor to estimate altitude, either with or without the use of GPS aiding data. According to further aspects, estimated altitude is integrated with other types of dead reckoning data to provide user context detection pertaining to changes of altitude.
摘要翻译：提供了用于估计用户相对于平均海平面的高度的方法和装置。根据一些方面，本发明能够估计开阔的天空以及劣化的GPS信号环境，例如密集的城市峡谷环境中的高度，其中GPS性能受到较少的可用卫星和/或多径误差的影响。根据其他方面，本发明使用来自压力传感器的数据来估计高度，无论是否使用GPS辅助数据。根据其他方面，估计高度与其他类型的航位推算数据集成，以提供与高度变化有关的用户上下文检测。

2. 发明授权

US09163946B2 Methods and applications for motion mode detection for personal navigation systems 有权
标题翻译：个人导航系统运动模式检测方法及应用
公开(公告)号：US09163946B2
公开(公告)日：2015-10-20
申请号：US12510965
申请日：2009-07-28
申请人： Mahesh Chowdhary , Arun Kumar , Manish Sharma , Kolin Paul , Mahaveer Jain , Gagan Narula
发明人： Mahesh Chowdhary , Arun Kumar , Manish Sharma , Kolin Paul , Mahaveer Jain , Gagan Narula
IPC分类号： G01C17/00 , G01C21/16 , G01C21/20
CPC分类号： G01C21/165 , G01C21/20
摘要： A method and apparatus of detecting and using motion modes in a mobile device is described. Movement data is collected from an inertial motion unit (IMU) of the mobile device and compared to two or more sets of training data, each set of training data corresponding to a different motion mode. Then, a motion mode is determined to be the current mode of the mobile device on the results of the comparison. The motion mode is used by the mobile device in a variety of applications.
摘要翻译：描述了一种在移动设备中检测和使用运动模式的方法和装置。从移动设备的惯性运动单元（IMU）收集移动数据，并与两组或多组训练数据进行比较，每组训练数据对应于不同的运动模式。然后，将运动模式确定为比较结果的移动设备的当前模式。运动模式由移动设备在各种应用中使用。

3. 发明授权

US08825426B2 Method and apparatus for calibrating a magnetic sensor 有权
标题翻译：用于校准磁性传感器的方法和装置
公开(公告)号：US08825426B2
公开(公告)日：2014-09-02
申请号：US12757908
申请日：2010-04-09
申请人： Mahesh Chowdhary , Mahaveer Jain
发明人： Mahesh Chowdhary , Mahaveer Jain
IPC分类号： G01C17/38 , G01P21/00 , G01C25/00 , G01R33/00
CPC分类号： G01D18/004 , G01C17/38 , G01R33/0035
摘要： In general, the invention relates to an algorithm and process for automated and/or continuous calibration of magnetic sensor, for example such as a sensor installed in a mobile positioning system handset. According to certain aspects, the calibration process can use the normal motion of the handset such that all measurement data from the three orthogonal axes of sensor when exposed to Earth's magnetic field is collected. According to still further aspects, the process includes fitting measurement data to an ellipsoid that characterizes the actual magnetic field measurements from a magnetic sensor, so that anomalies such as hard iron effect, soft iron effect and scale factors can be extracted and/or corrected by comparison to a sphere represented by magnetic field data from a model at the sensor's location.
摘要翻译：通常，本发明涉及用于磁传感器的自动和/或连续校准的算法和过程，例如安装在移动定位系统手机中的传感器。根据某些方面，校准过程可以使用手机的正常运动，使得当暴露于地球磁场时来自传感器的三个正交轴的所有测量数据被收集。根据另外的方面，该方法包括将测量数据拟合到表征来自磁传感器的实际磁场测量的椭球，从而可以通过以下方式提取和/或校正诸如硬铁效应，软铁效应和比例因子之类的异常与由传感器位置的模型的磁场数据表示的球体进行比较。

4. 发明申请

US20110106449A1 METHODS AND APPLICATIONS FOR ALTITUDE MEASUREMENT AND FUSION OF USER CONTEXT DETECTION WITH ELEVATION MOTION FOR PERSONAL NAVIGATION SYSTEMS 有权
标题翻译：用于个人导航系统的高度运动的高度测量和用户语境检测的方法和应用
公开(公告)号：US20110106449A1
公开(公告)日：2011-05-05
申请号：US12609582
申请日：2009-10-30
申请人： Mahesh Chowdhary , Arun Kumar , Manish Sharma , Ashutosh Pande , Mahaveer Jain , Gagan Narula , Chinmay Agarwal , Kolin Paul
发明人： Mahesh Chowdhary , Arun Kumar , Manish Sharma , Ashutosh Pande , Mahaveer Jain , Gagan Narula , Chinmay Agarwal , Kolin Paul
IPC分类号： G01C21/00 , G06F15/00 , G01L7/00 , G06F19/00 , G01L27/00
CPC分类号： G01C21/005 , G01C21/20 , G01S19/49
摘要： Methods and apparatuses for estimating a user's altitude with respect to the mean sea level are provided. According to some aspects, the present invention is able to estimate altitude in both open sky as well as in degraded GPS signal environments such as dense urban canyon environments where GPS performance is affected by fewer available satellites and/or multipath error. According to other aspects, the present invention uses data from a pressure sensor to estimate altitude, either with or without the use of GPS aiding data. According to further aspects, estimated altitude is integrated with other types of dead reckoning data to provide user context detection pertaining to changes of altitude.
摘要翻译：提供了用于估计用户相对于平均海平面的高度的方法和装置。根据一些方面，本发明能够估计开阔的天空以及劣化的GPS信号环境，例如密集的城市峡谷环境中的高度，其中GPS性能受到较少的可用卫星和/或多径误差的影响。根据其他方面，本发明使用来自压力传感器的数据来估计高度，无论是否使用GPS辅助数据。根据其他方面，估计高度与其他类型的航位推算数据集成，以提供与高度变化有关的用户上下文检测。

5. 发明申请

US20110248704A1 METHOD AND APPARATUS FOR CALIBRATING A MAGNETIC SENSOR 有权
标题翻译：用于校准磁传感器的方法和装置
公开(公告)号：US20110248704A1
公开(公告)日：2011-10-13
申请号：US12757908
申请日：2010-04-09
申请人： Mahesh CHOWDHARY , Mahaveer Jain
发明人： Mahesh CHOWDHARY , Mahaveer Jain
IPC分类号： G01R35/00
CPC分类号： G01D18/004 , G01C17/38 , G01R33/0035
摘要： In general, the invention relates to an algorithm and process for automated and/or continuous calibration of magnetic sensor, for example such as a sensor installed in a mobile positioning system handset. According to certain aspects, the calibration process can use the normal motion of the handset such that all measurement data from the three orthogonal axes of sensor when exposed to Earth's magnetic field is collected. According to still further aspects, the process includes fitting measurement data to an ellipsoid that characterizes the actual magnetic field measurements from a magnetic sensor, so that anomalies such as hard iron effect, soft iron effect and scale factors can be extracted and/or corrected by comparison to a sphere represented by magnetic field data from a model at the sensor's location.
摘要翻译：通常，本发明涉及用于磁传感器的自动和/或连续校准的算法和过程，例如安装在移动定位系统手机中的传感器。根据某些方面，校准过程可以使用手机的正常运动，使得当暴露于地球磁场时来自传感器的三个正交轴的所有测量数据被收集。根据另外的方面，该方法包括将测量数据拟合到表征来自磁传感器的实际磁场测量的椭球，从而可以通过以下方式提取和/或校正诸如硬铁效应，软铁效应和比例因子之类的异常与由传感器位置的模型的磁场数据表示的球体进行比较。

6. 发明申请

US20110029277A1 METHODS AND APPLICATIONS FOR MOTION MODE DETECTION FOR PERSONAL NAVIGATION SYSTEMS 有权
标题翻译：用于个人导航系统的运动模式检测的方法和应用
公开(公告)号：US20110029277A1
公开(公告)日：2011-02-03
申请号：US12510965
申请日：2009-07-28
申请人： Mahesh CHOWDHARY , Arun Kumar , Manish Sharma , Kolin Paul , Mahaveer Jain , Gagan Narula
发明人： Mahesh CHOWDHARY , Arun Kumar , Manish Sharma , Kolin Paul , Mahaveer Jain , Gagan Narula
IPC分类号： G06F15/00
CPC分类号： G01C21/165 , G01C21/20
摘要： A method and apparatus of detecting and using motion modes in a mobile device is described. Movement data is collected from an inertial motion unit (IMU) of the mobile device and compared to two or more sets of training data, each set of training data corresponding to a different motion mode. Then, a motion mode is determined to be the current mode of the mobile device on the results of the comparison. The motion mode is used by the mobile device in a variety of applications.
摘要翻译：描述了一种在移动设备中检测和使用运动模式的方法和装置。从移动设备的惯性运动单元（IMU）收集移动数据，并与两组或多组训练数据进行比较，每组训练数据对应于不同的运动模式。然后，将运动模式确定为比较结果的移动设备的当前模式。运动模式由移动设备在各种应用中使用。

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