Satellite-borne diffuse transmission type limb calibration mechanism

Abstract

The invention provides a satellite-borne diffuse transmission type limb calibration mechanism. The device comprises a shading cover plate, a limb calibration box body, a motor seat, a stepping motor, a main calibration plate pressing plate, a main calibration plate, a main calibration plate seat, a stepping motor and calibration plate seat adapter plate, a backup calibration plate pressing plate, a backup calibration plate, a backup calibration plate seat, a counterweight copper block, a main microswitch, a microswitch gear lever and a backup microswitch. According to the invention, the rotary supporting structure that the rotating shaft is parallel to the diffuse transmission calibration plate surface is adopted, so that the defects of large rotation area, large inertia and large installation size are reduced; and a calibration plate protection groove structure is designed, so that the calibration plate can stay in the protection groove when sunlight calibration is not carried out, the calibration plate can be prevented from being directly irradiated by sunlight, small performance change of the calibration plate is ensured, and a relatively good calibration effect is realized. Meanwhile, a microswitch gear lever is provided to limit and position the rotating part by touching the microswitch, and a counterweight copper block is provided to enable the mass center of the rotating part to be located on the rotating shaft, so that the impact on the microswitch during instrument transportation and rocket launching is reduced.

Description

technical field [0001] The invention relates to a rotating movable part of a spaceborne instrument in the field of satellite optical instrument design, in particular to a spaceborne diffuse transmission type limb calibration mechanism. Background technique [0002] In the prior art, the limb calibration mechanism is implemented in the form that the rotation axis is perpendicular to the diffuse transmission calibration plate, and the calibration plate is installed on a turntable structure, which has a large rotation area, a large rotational inertia, and a large installation size. Larger disadvantages; there is also a part of the calibration mechanism. When the calibration plate is not in the calibration position, the calibration plate is not well protected, so that the sunlight will directly shine on the calibration plate, making the performance of the calibration plate attenuated and affecting Calibration effect. Contents of the invention [0003] In order to solve the ab...

AI Technical Summary

Problems solved by technology

[0002] In the prior art, the limb calibration mechanism is implemented in the form that the rotation axis is perpendicular to the diffuse transmission calibration plate, and the calibration plate is installed on a turntable structure, which has a large rotation area, a large rotational inertia, and a large installation size. Larger disadvantages; there is also a part of the calibration mechanism. When the calibration plate is not in the calibration position, the calibration plate is not well protected, so that the sunlight will directly shine on the calibration plate, making the performance of the calibration plate attenuated and affecting Calibration effect

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