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    • 1. 发明申请
    • Magnetometer Accuracy and Use
    • 磁力计精度和使用
    • US20120157158A1
    • 2012-06-21
    • US13301650
    • 2011-11-21
    • Robert MayorPatrick PiemonteRonald Keryuan HuangParin Patel
    • Robert MayorPatrick PiemonteRonald Keryuan HuangParin Patel
    • H04W88/02
    • G01C17/38G01R33/10G01V3/087G08B7/06
    • A parameter related to the Earth's magnetic field can be used to determine accuracy of a magnetometer of a mobile device. In one aspect, a first instance of a parameter related to Earth's magnetic field is determined using data generated by the magnetometer. The magnetometer data can be based in part on a position of the mobile device with respect to the Earth. A second instance of the parameter can be determined using data generated by a model of Earth's magnetic field. The model data can also be based in part on the position of the mobile device with respect to the Earth. The first instance of the parameter can be compared with the second instance of the parameter. An accuracy metric for the magnetometer can be determined based on a result of the comparison. An indication of the accuracy metric can be presented by the mobile device.
    • 可以使用与地球磁场相关的参数来确定移动设备的磁力计的精度。 在一个方面,使用由磁力计产生的数据来确定与地球磁场相关的参数的第一个实例。 磁力计数据可以部分地基于移动设备相对于地球的位置。 可以使用地球磁场模型生成的数据来确定参数的第二个实例。 模型数据也可以部分地基于移动设备相对于地球的位置。 参数的第一个实例可以与参数的第二个实例进行比较。 可以基于比较的结果来确定磁力计的精度度量。 可以由移动设备呈现精度度量的指示。
    • 5. 发明授权
    • Magnetometer accuracy and use
    • 磁力计的精度和使用
    • US08061049B2
    • 2011-11-22
    • US13030067
    • 2011-02-17
    • Robert MayorPatrick PiemonteRonald Keryuan HuangParin Patel
    • Robert MayorPatrick PiemonteRonald Keryuan HuangParin Patel
    • G01C17/38
    • G01C17/38G01R33/10G01V3/087G08B7/06
    • A parameter related to the Earth's magnetic field can be used to determine accuracy of a magnetometer of a mobile device. In one aspect, a first instance of a parameter related to Earth's magnetic field is determined using data generated by the magnetometer. The magnetometer data can be based in part on a position of the mobile device with respect to the Earth. A second instance of the parameter can be determined using data generated by a model of Earth's magnetic field. The model data can also be based in part on the position of the mobile device with respect to the Earth. The first instance of the parameter can be compared with the second instance of the parameter. An accuracy metric for the magnetometer can be determined based on a result of the comparison. An indication of the accuracy metric can be presented by the mobile device.
    • 可以使用与地球磁场相关的参数来确定移动设备的磁力计的精度。 在一个方面,使用由磁力计产生的数据来确定与地球磁场相关的参数的第一个实例。 磁力计数据可以部分地基于移动设备相对于地球的位置。 可以使用地球磁场模型生成的数据来确定参数的第二个实例。 模型数据也可以部分地基于移动设备相对于地球的位置。 参数的第一个实例可以与参数的第二个实例进行比较。 可以基于比较的结果来确定磁力计的精度度量。 可以由移动设备呈现精度度量的指示。
    • 6. 发明申请
    • Magnetometer Accuracy and Use
    • 磁力计精度和使用
    • US20110131825A1
    • 2011-06-09
    • US13030067
    • 2011-02-17
    • Robert MayorPatrick PiemonteRonald Keryuan HuangParin Patel
    • Robert MayorPatrick PiemonteRonald Keryuan HuangParin Patel
    • G01C17/38
    • G01C17/38G01R33/10G01V3/087G08B7/06
    • A parameter related to the Earth's magnetic field can be used to determine accuracy of a magnetometer of a mobile device. In one aspect, a first instance of a parameter related to Earth's magnetic field is determined using data generated by the magnetometer. The magnetometer data can be based in part on a position of the mobile device with respect to the Earth. A second instance of the parameter can be determined using data generated by a model of Earth's magnetic field. The model data can also be based in part on the position of the mobile device with respect to the Earth. The first instance of the parameter can be compared with the second instance of the parameter. An accuracy metric for the magnetometer can be determined based on a result of the comparison. An indication of the accuracy metric can be presented by the mobile device.
    • 可以使用与地球磁场相关的参数来确定移动设备的磁力计的精度。 在一个方面,使用由磁力计产生的数据来确定与地球磁场相关的参数的第一个实例。 磁力计数据可以部分地基于移动设备相对于地球的位置。 可以使用地球磁场模型生成的数据来确定参数的第二个实例。 模型数据也可以部分地基于移动设备相对于地球的位置。 参数的第一个实例可以与参数的第二个实例进行比较。 可以基于比较的结果来确定磁力计的精度度量。 可以由移动设备呈现精度度量的指示。
    • 8. 发明申请
    • Restoring and Storing Magnetometer Calibration Data
    • 恢复和存储磁力计校准数据
    • US20100312513A1
    • 2010-12-09
    • US12479483
    • 2009-06-05
    • Robert MayorRonald Keryuan HuangPatrick Piemonte
    • Robert MayorRonald Keryuan HuangPatrick Piemonte
    • G01R35/00G06F19/00
    • G01R33/0035
    • Responsive to a recalibration trigger event, magnetometer data output by a magnetometer can be compared to historical magnetometer data previously output by the magnetometer. If a match is determined, a confidence of the match can be determined using theoretically constant data related to Earth's magnetic field. The constant data can be calculated from the historical magnetometer data. If the confidence of the match exceeds a confidence threshold level, historical calibration data can be used to calibrate the magnetometer. If the confidence of the match does not exceed the confidence threshold level, a calibration procedure can be performed to generate new calibration data, and the new calibration data can be used to calibrate the magnetometer.
    • 响应于重新校准触发事件,磁力计输出的磁力计数据可以与先前由磁力计输出的历史磁力计数据进行比较。 如果确定了匹配,则可以使用与地球磁场相关的理论常数来确定匹配的置信度。 恒定数据可以从历史磁力计数据计算。 如果匹配的置信度超过置信度阈值水平,则历史校准数据可用于校准磁力计。 如果匹配的置信度不超过置信阈值水平,则可以执行校准程序以生成新的校准数据,并且可以使用新的校准数据来校准磁力计。
    • 10. 发明授权
    • Restoring and storing magnetometer calibration data
    • 恢复和存储磁力计校准数据
    • US08437970B2
    • 2013-05-07
    • US12479483
    • 2009-06-05
    • Robert MayorRonald Keryuan HuangPatrick Piemonte
    • Robert MayorRonald Keryuan HuangPatrick Piemonte
    • G01C17/38
    • G01R33/0035
    • Responsive to a recalibration trigger event, magnetometer data output by a magnetometer can be compared to historical magnetometer data previously output by the magnetometer. If a match is determined, a confidence of the match can be determined using theoretically constant data related to Earth's magnetic field. The constant data can be calculated from the historical magnetometer data. If the confidence of the match exceeds a confidence threshold level, historical calibration data can be used to calibrate the magnetometer. If the confidence of the match does not exceed the confidence threshold level, a calibration procedure can be performed to generate new calibration data, and the new calibration data can be used to calibrate the magnetometer.
    • 响应于重新校准触发事件,磁力计输出的磁力计数据可以与先前由磁力计输出的历史磁力计数据进行比较。 如果确定了匹配,则可以使用与地球磁场相关的理论常数来确定匹配的置信度。 恒定数据可以从历史磁力计数据计算。 如果匹配的置信度超过置信度阈值水平,则历史校准数据可用于校准磁力计。 如果匹配的置信度不超过置信阈值水平,则可以执行校准程序以生成新的校准数据,并且可以使用新的校准数据来校准磁力计。