发明授权
US07197343B2 Portable electronic apparatus with azimuth measuring function, magnetic sensor suitable for the apparatus, and azimuth measuring method for the apparatus
有权
具有方位测量功能的便携式电子设备，适用于该设备的磁性传感器，以及该装置的方位测量方法
- 专利标题： Portable electronic apparatus with azimuth measuring function, magnetic sensor suitable for the apparatus, and azimuth measuring method for the apparatus
- 专利标题（中）： 具有方位测量功能的便携式电子设备，适用于该设备的磁性传感器，以及该装置的方位测量方法
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申请号： US10190525申请日： 2002-07-09
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公开(公告)号： US07197343B2公开(公告)日： 2007-03-27
- 发明人: Hideki Sato
- 申请人： Hideki Sato
- 申请人地址： JP Hamamatsu
- 专利权人： Yamaha Corporation
- 当前专利权人： Yamaha Corporation
- 当前专利权人地址： JP Hamamatsu
- 代理机构： Dickstein, Shapiro, LLP.
- 优先权： JP2001-210053 20010710; JP2002-115250 20020417
- 主分类号： H04M1/00
- IPC分类号： H04M1/00
摘要：
A portable phone has a CPU and a magnetic sensor unit including an X-axis magnetic sensor, a Y-axis magnetic sensor, and a temperature sensor. CPU measures at first and second temperatures the influence of a magnetic field of permanent magnets upon an output Sx of the X-axis magnetic sensor and an output Sy of the Y-axis magnetic sensor, and stores the influence data together with the first and second temperature data. CPU estimates at the present temperature the influence upon the output Sx of the X-axis magnetic sensor and the output Sy of the Y-axis magnetic sensor, from the present temperature detected with the temperature sensor and the stored influence data. CPU corrects the outputs Sx and Sy in accordance with the estimated influence and determines the direction of the portable phone from the corrected outputs Sx and Sy.
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