Method of Measuring Attitude Angle of Reference Cube Mirror Based on Gyro Theodolite

Abstract

The invention discloses a method for measuring the posture angle matrix of a base cubic mirror, relative to a geodetic coordinate system based on a gyro theodolite. The method comprises the following steps: firstly, measuring any two adjacent side surfaces of the base cubic mirror in an alignment manner by the gyro theodolite and an electronic theodolite respectively to obtain the azimuth angle and zenith distance of the gyro theodolite in the alignment direction and the zenith distance of the electronic theodolite in the alignment direction; secondly, calculating through a vertical relationship between the two surfaces to obtain the azimuth angle of the electronic theodolite in the alignment direction; finally, obtaining the posture angle matrix of the base cubic mirror, relative to the geodetic coordinate system. According to the method, one gyro theodolite is omitted, so that the cost is reduced; meanwhile, the mutual alignment between a general theodolite and the gyro theodolite is avoided, so that the measurement precision and efficiency are improved, and the light path shielding during mutual alignment under the complicated working condition is prevented.

Description

technical field [0001] The invention belongs to the technical field of industrial measurement, and specifically relates to a method for comprehensively utilizing a gyro theodolite and an electronic theodolite to measure the attitude angle of a reference cubic mirror relative to a geodetic coordinate system. North measurements as well as relative attitude angle measurements between devices. Background technique [0002] In the integrated manufacturing and testing process of modern large-scale precision systems represented by the spacecraft assembly test, it is necessary to precisely measure the attitude angle of the inertial equipment relative to the earth coordinate system. The inertial equipment under test usually uses a reference cubic mirror to characterize the body coordinate system of the device, and uses three mutually orthogonal plane mirror normals on the cube mirror to represent the coordinate axis orientation of the device body coordinate system. Therefore, measur...

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Problems solved by technology

The second method reduces the cost and improves the measurement efficiency due to the use of an electronic theodolite to collimate and measure one of the mirrors, but this method requires mutual aiming between the electronic theodolite and the gyro theodolite, thus reducing the accuracy, and in some Under complex on-site working conditions, it is difficult to implement because the mutual aiming optical path is blocked

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