Frequency difference digital compass and magnetometer

Details Frequency difference digital compass and magnetometer Frequency difference digital compass and magnetometer

G - Physics

01

R

324/57, 33/97

G01R 33/02 (2006.01) G01C 17/28 (2006.01) G01C 17/30 (2006.01)

Patent

CA 1289621

ABSTRACT OF THE DISCLOSURE A digital compass (20) has a sensing coil (60) wound on an elongated strip of high direct current permeability magnetic material. The sensing coil (60) is connected to a sensing circuit (56). The sensing coil and sensing circuit are responsive to the Earth's magnetic field to provide an oscillating signal at an output (28) of the sensing circuit (56) which varies in frequency with orientation of the at least one sensing coil (60) with respect to the Earth's magnetic field. A microprocessor (36) is connected to receive information inputs from the oscillating signal. The microprocessor converts the information inputs to an indication of orientation of the sensing coil with respect to the Earth's magnetic field based on the frequency of the oscillating signal. A display (52) receives the orientation indication from the microprocessor.

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