发明名称 Electronic apparatus with azimuth meter and azimuth measuring method in this electronic apparatus
摘要 An electronic apparatus with an azimuth meter is capable of measuring an accurate azimuth and is made small even if one or a plurality of magnetized members for generating a magnetic field exists. Magnetic screen is provided for shielding an azimuth sensor from a magnetic field generated from a battery and a stepping motor. Moreover, when the stepping motor rests, an azimuth is measured, and rotor rest time and a direction of the magnetic field generated from a rotor are predicted based on rotor rotation starting time and a direction of a driving current flowing through a coil, and the measured azimuth is corrected according to the predicted result.
申请公布号 US6385133(B1) 申请公布日期 2002.05.07
申请号 US20000489928 申请日期 2000.01.24
申请人 CITIZEN WATCH CO., LTD. 发明人 MIYAUCHI NORIO
分类号 G01C17/30;G04G21/02;G04G99/00;(IPC1-7):G04B47/00 主分类号 G01C17/30
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