Data processing: measuring – calibrating – or testing – Calibration or correction system – Direction
Reexamination Certificate
2005-07-26
2005-07-26
Barlow, John (Department: 2863)
Data processing: measuring, calibrating, or testing
Calibration or correction system
Direction
C702S085000, C702S094000, C702S104000, C033S35500D, C324S202000, C324S260000
Reexamination Certificate
active
06922647
ABSTRACT:
A device for automatically detecting a calibration termination of a geomagnetic sensor includes 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 Nxand Nyof 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 Nxand Ny.
REFERENCES:
patent: 4414753 (1983-11-01), Moulin et al.
patent: 4831563 (1989-05-01), Ando et al.
patent: 6282496 (2001-08-01), Chowdhary
patent: 6282803 (2001-09-01), Dunne
Cho Woo-jong
Choi Sang-on
Lee & Morse P.C.
Vo Hien
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