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Multiple slit device for measuring sun position angle of digital sun sensor

A sun sensor and sun azimuth technology, applied in the field of sun sensors, can solve problems such as field of view area distinction, and achieve the effect of expanding the measurement range of the field of view

Inactive Publication Date: 2007-10-10
SHANGHAI INST OF TECHNICAL PHYSICS - CHINESE ACAD OF SCI
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Problems solved by technology

But one of the problems it brings is how to distinguish the field of view area

Method used

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  • Multiple slit device for measuring sun position angle of digital sun sensor
  • Multiple slit device for measuring sun position angle of digital sun sensor

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Embodiment Construction

[0009] The present invention is described in detail below in conjunction with Fig. 2 and embodiment, and the specific technical index of embodiment is as follows:

[0010] The single-axis field of view is ±60°×±60°, and the accuracy requirement is 0.05° within -33°~+33°, and the resolution is 0.01°; ) The internal precision is required to reach 0.1°, the resolution is 0.02°, and the linear CCD detector is 2048 photosensitive elements.

[0011] As shown in Figure 2, the position of the photosensitive element 0 is under the A1 slit, and the position of the 2048 photosensitive element is under the A3 slit, wherein the A1 slit and the A3 slit are in the same plane, and the distance from the CCD photosensitive element is equal to 10mm. The distance between the height of the A2 slit and the CCD photosensitive element is 17mm, and the distances between the A1 slit, the A3 slit and the A2 slit are all 17mm. There is an energy attenuation sheet 11 between the CCD photosensitive elemen...

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Abstract

A multi-slit device used for measuring sun position angle of digital sun sensor is prepared for fixing three slits being parallel to each other in support, making three slits be not in the same plane, setting height of middle slit to CCD detector to be greater than that of two side slits form making measurement accuracy of middle slit be more accurate and measurement field of two side slits be more wide, adding light incoming hole and two photocells and enabling to judge out that which is field existed with the sun by processing photocell signal and CCD signal.

Description

technical field [0001] The invention relates to a sun sensor in an attitude control system of a satellite or other space vehicles, and specifically refers to a multi-slit device for measuring the sun azimuth angle of the sun sensor. technical background [0002] High-precision digital sun sensors often use linear array devices CCD plus slits to measure the sun's azimuth. According to the number of slits, it can be divided into single slit type and multi-slit type. The length of the linear array detector CCD and the distance between the slit and the CCD determine the field of view and precision of the sun sensor in the direction of the measurement axis. The length of the slit and its distance from the CCD determine the field of view off the measuring axis. Under a single slit, to achieve a precision of 0.05°, the number of pixels of the CCD array required for a field of view of ±40° is about 2048 yuan, and when it reaches ±64°, the number of pixels of the CCD array is about...

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Application Information

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IPC IPC(8): G01C21/02G01C1/00
Inventor 仇善昌席红霞孙胜利
Owner SHANGHAI INST OF TECHNICAL PHYSICS - CHINESE ACAD OF SCI
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