High frame frequency sun sensor and implementing method thereof

Abstract

The invention discloses a high frame rate sun sensor. The sensor realizes high data update rate of the ROI-based window dynamic tracking through an image acquisition module, a calculation module, a prediction module and a first control module. The invention further discloses a realization method of the high frame rate sun sensor; the method utilizes the current solar facula image and coordinates of center of mass of a facula which is corresponding to a same small hole obtained by the former solar facula image to predict the position of the facula which is corresponding to the small hole in the next solar facula image, thereby realizing the ROI window dynamic tracking; compared with the sun sensor which is based on the full-frame image collection, the high frame rate sun sensor greatly reduces data of a background pixel region. The use of the high frame rate sun sensor and the realization method can reduce the amount of the data which needs to be processed for obtaining attitude information and improve the data update rate of the sun sensor.

Description

Technical field [0001] The invention relates to attitude sensor technology, in particular to a high frame rate solar sensor and an implementation method thereof. Background technique [0002] The sun sensor is a kind of attitude sensor. It determines the position of the sun in the coordinate system of the sun sensor by measuring the angle between the sun's rays and a certain axis of the satellite. At present, the photosensitive elements used in high-precision solar sensors mainly include charge coupled device (CCD) image sensors and complementary metal oxide semiconductor (CMOS) image sensors. With the trend of miniaturization of satellites, solar sensors as a component of satellites also need to be miniaturized. CCD-based solar sensors cannot meet the demand for miniaturization of satellite components, while CMOS image sensors rely on their low cost. , Low power consumption, small size, high integration, flexible control and other advantages, have been more and more widely used....

AI Technical Summary

Problems solved by technology

[0003] However, the sun sensor based on the CMOS image sensor currently obtains the sun spot image by means of full-frame image acquisition, and determines the position of the sun in the sun sensor body coordinate system by performing full-frame data processing on the sun spot image. The full-frame data processing of the sun spot image requires a large amount of data to be processed and a long processing time, which makes the data update rate of the sun sensor low, and the highest is only 10Hz

Images