发明申请
- 专利标题： Magnetometer Accuracy and Use
- 专利标题（中）： 磁力计精度和使用
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申请号： US13301650申请日： 2011-11-21
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公开(公告)号： US20120157158A1公开(公告)日： 2012-06-21
- 发明人: Robert Mayor , Patrick Piemonte , Ronald Keryuan Huang , Parin Patel
- 申请人： Robert Mayor , Patrick Piemonte , Ronald Keryuan Huang , Parin Patel
- 申请人地址： US CA Cupertino
- 专利权人： APPLE INC.
- 当前专利权人： APPLE INC.
- 当前专利权人地址： US CA Cupertino
- 主分类号： H04W88/02
- IPC分类号： H04W88/02
摘要：
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.