×

Device and method for automatically detecting a calibration termination for a geomagnetic sensor

  • US 6,922,647 B2
  • Filed: 10/10/2003
  • Issued: 07/26/2005
  • Est. Priority Date: 11/28/2002
  • Status: Active Grant
First Claim
Patent Images

1. A device for automatically detecting a calibration termination of a geomagnetic sensor, comprising:

  • a detection unit for detecting signals X and Y outputted from X-axis and Y-axis coils of the geomagnetic sensor, respectively;

    a calculation unit for calculating slopes dX/dt and dY/dt of the signals X and Y, respectively, and the number of sign changes Nx and Ny of the slope dX/dt of the signal X and the slope dY/dt of the signal Y, respectively;

    a display unit for displaying the calibration termination and a calibration progress state for the geomagnetic sensor; and

    a control unit for outputting a driving signal to the display unit to display a state of the calibration termination based on the slope dX/dt of the signal X and the slope dY/dt of the signal Y and the number of slope sign changes Nx and Ny.

View all claims
  • 1 Assignment
Timeline View
Assignment View
    ×
    ×