Fiber Optic Gyro Theodolite and Its North Finding Method

Abstract

The invention relates to an optical fiber gyroscope theodolite and a north-seeking method thereof. The optical fiber gyroscope theodolite comprises an optical fiber gyroscope and a theodolite, wherein the theodolite covers a total station. The optical fiber gyroscope is arranged on a horizontal rotating part of the theodolite; the normal of the closed light path of the optical fiber gyroscope is perpendicular to a horizontal rotating shaft of the theodolite; a theodolite base gear is arranged on the outer side of a theodolite base fixing part; the theodolite base gear is connected with a driving motor which is arranged on the horizontal rotating part of the theodolite through a gear set. The north-seeking method for the optical fiber gyroscope theodolite comprises the steps of dynamic north-seeking and static north-seeking. The optical fiber gyroscope theodolite is compact in structure, small in size, light in weight and suitable for being carried by a single person to be used in a complex terrain district. The instrument and the north-seeking method have the advantages of simplicity in operation, high rapidness, one-key north-seeking function, convenience in use and the like. In addition, the optical fiber gyroscope theodolite is wide in application range, is dual-purpose for the army and people and can be used for determination of north benchmark, mine and geodetic measurement, military survey and the like.

Description

technical field [0001] The invention relates to the field of measuring instruments, in particular to a fiber optic gyro theodolite and a north finding method. Background technique [0002] The Sagnac effect of fiber optic gyroscope is that the phase difference between two light waves propagating oppositely along the closed optical path is proportional to the input angular velocity normal to the closed optical path. The normal direction of the closed optical path of the fiber optic gyroscope is the sensitive axis of the fiber optic gyroscope. When the normal direction of the closed optical path of the fiber optic gyroscope is horizontal, the fiber optic gyroscope can be used to sense the horizontal component of the angular velocity of the earth's rotation. Using the output of different directions when the normal horizontal of the closed optical path of the fiber optic gyroscope is used, and after calculation, the angle between the initial normal horizontal direction of the cl...

AI Technical Summary

Problems solved by technology

The existing fiber optic gyro north finder is mainly composed of fiber optic gyroscope, horizontal turntable and servo mechanism. The angular velocity of rotation requires a separate design of the horizontal rotating platform and the corresponding servo mechanism, which is not only cumbersome and complicated, but also cannot fully meet the high-precision requirements of north-seeking

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