基于CMOS APS的微型数字式太阳敏感器

Micro-digital sun sensor with CMOS APS

研制了一种适用于微型航天器的两轴数字式太阳敏感器,其光学系统由CMOS APS图像传感器和MEMS工艺制作的孔阵列结构光线引入器组成。敏感器外形尺寸68mm×68 mm×58 mm,质量小于300 g,功耗低于2.5 W,更新率优于2Hz。该文介绍了CMOS APS图像传感器的优势及其在太阳敏感器中的应用,以及所研制微型太阳敏感器的系统硬件、软件设计。对微型太阳敏感器样机进行了标定,结果表明微型太阳敏感器在±64°视场以内精度优于0.1°,±10°视场以内精度优于0.02°。

A two-axis digital sun sensor was developed for micro spacecrafts. The sensor is 68 mm × 68 mm × 58 mm, weights less than 300 g, has a power consumption of less than 2.5 W and a turnover rate of more than 2 Hz. The sensor optical system includes a CMOS APS image sensor and a MEMS based diaphragm with a pinhole array structure. This paper describes the advantages of the CMOS APS image sensor in the sun senser and the hardware and software design of the micro-digital sun sensor based on the CMOS APS image sensor. The calibration indicated that the angle estimation accuracy is 0. 1° with a field of view ±64° and better than 0.02° within ± 10°.