航天遥感TDICCD相机星上振动实时检测

Real-time vibration detection of space TDI CCD remote sensing camera

为了对航天遥感相机焦平面振动进行实时检测,提出了一种利用CMOS图像传感器和快速灰度投影算法的振动实时检测方案。首先,分析了航天遥感相机焦面振动检测系统要满足的条件,提出了一种在焦面空闲处安装CMOS图像传感器的结构来获取图像序列,然后对传统灰度投影算法进行了改进并利用该算法计算了图像序列间的振动量,最后,利用FPGA对算法进行了实现。理论分析和实验结果均表明,提出的方案能满足航天遥感相机对焦面振动检测的要求。

In order to develop real-time vibration detection of space remote sensing camera , a real-time vibration detection method based on CMOS image sensor and fast gray projection algorithm is proposed .Firstly, the basic condition for vibration detection system of focal plane in space remote sensing camera is analyzed .Then, the special structure for CMOS image sensor fitting in idle area of focal plane is proposed to obtain image sequence .Finally, the vibration of image sequence is calculated by using the improving gray projection algorithm which is realized under FPGA platform.The principle analysis and experiment show that the proposed method can satisfy the focal plane vibration detection requirement of space remote sensing camera .