The application of template matching arithmetic on Strap-down North Seeking System

In order to solve the problem of self-determination directional of theodolite, equipment based on dynamically tuned gyroscope is proposed. The principle of the Multi-position Strap-down North Seeking System is introduced. Mathematical model of the system is discussed. The factors that influence the precision are analyzed. In order to fit the curve of sampling data, back-propagation neural network arithmetic is used in data processing. As templates, curve model is saved at database of the VC++ software. The template matching arithmetic advanced the measure precision of this system. The measure time of the system is shortened within 1 minute, so it can save time for theodolite.