Invention Grant
US06385133B1 Electronic apparatus with azimuth meter and azimuth measuring method in this electronic apparatus 失效
该电子设备中具有方位计的电子仪器和方位测量方法

  • Patent Title: Electronic apparatus with azimuth meter and azimuth measuring method in this electronic apparatus
  • Patent Title (中): 该电子设备中具有方位计的电子仪器和方位测量方法
  • Application No.: US09489928
    Application Date: 2000-01-24
  • Publication No.: US06385133B1
    Publication Date: 2002-05-07
  • Inventor: Norio Miyauchi
  • Applicant: Norio Miyauchi
  • Priority: JP10-174374 19980622; JP10-241337 19980827
  • Main IPC: G04B4700
  • IPC: G04B4700
Electronic apparatus with azimuth meter and azimuth measuring method in this electronic apparatus
Abstract:
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.
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