Geometrical instruments – Indicator of direction of force traversing natural media – Magnetic field responsive
Patent
1990-02-28
1991-10-01
Cuchlinski, Jr., William A.
Geometrical instruments
Indicator of direction of force traversing natural media
Magnetic field responsive
324254, 324247, G01C 1728
Patent
active
050521160
ABSTRACT:
A method of measuring an azimuth by detecting the earth's magnetism by using two perpendicular coils to detect the azimuth according to the outputs of the coils, including the steps of converting the outputs of the coils by multiplying them by a constant so as to vary in a range determined by a reference value, dividing the converted signal by the reference value, and measuring the azimuth at each coil output according to an inverse trigonometric function, with the divided result as a variable. An azimuth measuring apparatus for executing the method is also provided. Thus, the method and apparatus can accurately detect the azimuth and can further detect an error due to a disorder of the earth's magnetism or the inclination of the apparatus.
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Nakajima Ryoichi
Oide Sakuji
Alps Electric Co. ,Ltd.
Cuchlinski Jr. William A.
Gutierrez Diego F. F.
Kivlin B. Noel
Shoup Guy W.
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