The compass is a simple instrument used to determine the orientation. Also known as the compass needle. The predecessor of the compass is Si Nan, one of the four greatest inventions in ancient China. The main component is a magnetic needle that can be freely rotated on the shaft. The magnetic needle can be maintained in the tangential direction of the magnetic meridian under the action of the earth magnetic field. The north pole of the magnetic needle points to the geographic North, and this property can be used to identify the direction. It is commonly used in navigation, geodesy, travel and military affairs. The same name also includes the name of the band and the name of the movie.
North finder is a high-precision dual-shaft dynamic tuning gyro that can determine the true north direction value of the attached carrier by measuring the angular velocity of the earth's rotation. It is not affected by external magnetic fields or other environments. In addition, it can also be combined with acceleration for horizontal angle measurement and correction. The gyro north seeker is mainly used for: radar, antennas, military vehicles, initial alignment and direction control.
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