基于CMOS图像传感器的纳型卫星遥感系统设计

Remote sensing system for nanosatellite with CMOS imaging sensor

为满足纳型卫星的遥感系统要求,设计了一套基于互补型金属氧化物半导体CMOS图像传感器的纳型卫星遥感系统,采用PC机模拟星上数据处理系统的功能,通过控制器局域网CAN(controllerareanetwork)总线实现了对CMOS相机的控制和图像传输等功能。通过热循环实验,得到了该CMOS相机平均暗输出和暗不一致性随温度的变化曲线,预测其适于在10～25℃的空间温度环境中工作,并可经受-25～60℃的卫星舱内温度变化。

A remote sensing system based on a CMOS (complementary metal oxide semiconductor) imaging sensor was designed for nanosatellites. A PC computer was used to simulate the on-board data handling system function in the satellite. The CMOS camera control and the image transmission were both via a CAN (controller area network) bus. The camera was used for thermal cycle experiments to monitor the average dark output and the nonuniformity of the dark output as functions of temperature. It is concluded that the CMOS camera can stand the temperature range of -25 ℃ to 60 ℃ and temperatures of between 10 ℃ to 25 ℃ are suitable for image capture in space.