2 results about "Theodolite" patented technology

The invention discloses an altitude difference calibration method and a system of an inertial navigation prism and relates to the technical field of precise guidance and alignment of rocket vehicles.The method comprises the steps of fastening an inertia unit navigation system equipped with the prism, as a core rocket component, on a rotary table, collimating and observing horizontal azimuth angles and pitching angles of the inertial navigation prism in various positions through a theodolite by controlling different positions of the rotary table to rotate, calculating a horizontal azimuth angle and an altitude difference of a similar observation celestial body according to rotary table angles, the horizontal azimuth angles and the pitching angles of the corresponding positions, and calculating a mounting deviation of the inertial navigation prism. The method and the system are based on a celestial navigation altitude difference positioning principle, achieve precision calibration of the mounting deviation of the inertial navigation prism through multiposition observation of the inertial navigation prism, are high in precision and simple and convenient to use and have better socialextended application value and economic value.