Follow-up light shield control system of space remote sensor

A space remote sensor and control system technology, applied in the direction of control using feedback, can solve the problems of uneven temperature distribution of the hood, heat flow problems, stray light and other problems, and achieve the effect of suppressing stray light and heat flow problems.

Inactive Publication Date: 2012-07-11
SHANGHAI INST OF TECHNICAL PHYSICS - CHINESE ACAD OF SCI
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Problems solved by technology

[0003] 1) When the sun is in the oblique front position of the sunshade, some of the sun's rays will hit the inner wall of the sunshade, and will enter the optical system after multiple refl

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  • Follow-up light shield control system of space remote sensor
  • Follow-up light shield control system of space remote sensor
  • Follow-up light shield control system of space remote sensor

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Embodiment Construction

[0019] The principle of the whole follow-up hood is as follows: figure 1 As shown, the mouth of the mask is designed at a 45° inclination angle. The sunshade and the satellite platform are connected by a pulley block, which can realize rotation around the central axis, and the rotational torque is provided by a stepping motor installed on the satellite platform. When rotated to the ideal shading position, the long side of the main body of the sunshade faces the sun, and the short side faces away from the sun, so that the sun's rays can go out directly from the short side.

[0020] The entire control system includes: a detection unit, a control unit and a drive unit to realize the control of the main body of the hood, such as figure 2 shown. Specific process: First, detect the azimuth angle of the sun relative to the sunshade through the sun sensor, and transmit it to the control system through the RS422 interface; then, the control system converts the obtained data into the...

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Abstract

The present invention discloses a follow-up light shield control system of a space remote sensor. The opening of the light shield is a 45-DEG chamfer-shaped member. In operation of the system, a solar sensor is utilized for detecting an azimuth of the sun relative to the light shield, and the real-time azimuth information is transmitted to the control system; the control system calculates a required rotation angle of the light shield according to the obtained sun position information, and drives the light shield to rotate to an ideal shielding position through driving a stepping motor. At the ideal shielding position, the long edge of the light shield body faces the sun, and the short edge opposes the sun. The problems of stray light and heat flow caused by the sun can be settled fundamentally.

Description

technical field [0001] The invention relates to a follow-up control system for an outer shading cover of a space remote sensor, in particular to a follow-up control system for an outer shading cover that can reduce the problems of stray light and heat flow caused by incident sunlight through the follow-up function system. Background technique [0002] The sun is the most important stray light source in the space optical system. Therefore, the ability of the outer shading cover of the space remote sensor to suppress stray light caused by solar intrusion directly affects the imaging quality of the optical system. At present, space remote sensors generally use straight-shaped hoods. This structure will cause two problems: [0003] 1) When the sun is at the oblique front position of the sunshade, part of the sun's rays will hit the inner wall of the sunshade, and will enter the optical system after multiple reflections, causing stray light problems. [0004] 2) The light hitt...

Claims

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Application Information

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IPC IPC(8): G05D3/12
Inventor 蒋范明孙胜利陈凡胜张旋李晓平雍朝良
Owner SHANGHAI INST OF TECHNICAL PHYSICS - CHINESE ACAD OF SCI
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