Satellite high-precision angle measurement method based on photoelectric autocollimator

Abstract

The invention provides a satellite high-precision angle measurement method based on a photoelectric auto-collimator. The method comprises the following steps: 1) placing a satellite fixed support on a rotation bench, a state is labeled as a state I; 2) employing two auto-collimators for respectively aiming at cubic mirrors on two single machines, adjusting the position of the auto-collimators so that the a measurement optical path by the auto-collimators are perpendicular to the corresponding detected cubic mirrors; 3) rotating the rotation bench to a minimal angle by winding a rotation shaft; and 4) obtaining the angle deflection amount of the detected mirror surface of the cubic mirrors on two single machines, and calculating the image point coordinates of the auto-collimators on a sensor screen. According to the invention, space minimal angle change of the detected mirror surface can be automatically obtained by several auto-collimators, under the prerequisite that the ultrahigh precision measurement capability of the photoelectric auto-collimator is used, measurement error due to manual operation can be avoided, satellite angle measurement precision is increased for further, and the angle measurement method has the advantages of multitime measurement, fast calculating and high measurement precision.

Description

technical field [0001] The invention relates to an angle measurement method, in particular to a satellite high-precision angle measurement method based on a photoelectric autocollimator. Background technique [0002] When the satellite is assembled on the ground, it is necessary to obtain the line-of-sight relationship between each precision stand-alone machine on the satellite. There are many difficulties in the actual operation process of directly measuring the line-of-sight of the instrument under test. The measurement is performed with the mirror-normal optical axis of the cube mirror installed on the device pointing instead of the boresight pointing. At present, theodolite measurement system is widely used for measurement, that is, the angle information between the measured mirrors is obtained by using the collimation and mutual aiming of multiple regularly distributed theodolites, and then the angle relationship between the normal vector space of the measured mirrors i...

AI Technical Summary

Problems solved by technology

During the measurement process, the human eye is mainly relied on for operations such as collimation and mutual aiming. The measurement process is time-consuming and laborious, and taking into account the line width of the measured target and the difference in human vision, it often causes large errors.

It has been unable to fully meet the installation and measurement requirements of the new generation of high-orbit, high-resolution remote sensing satellites for the boresight pointing accuracy of spaceborne instruments

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