星载光学遥感相机图像模拟源的设计与实现

Design and Realization of Image Simulator of Space Vehicle Borne Optical Remote Sensing Camera

在星载光学遥感相机研制过程中,进行相机的原理实现和功能验证是必要环节,图像模拟源就是关键的实验设备;图像模拟源主要是模拟相机输出的高速图像,以及相机的工作模式和工作流程;采用现场可编程门阵列FPGA实现模拟源的时序与逻辑控制,通过RS-422总线接收控制命令,高速的图像数据的传输采用Channel Link技术,通过高速LVDS接口发送给地面图像数据采集与处理系统,模拟源输出的总数据率达到4.56Gbps;该图像模拟源具有设计灵活、性能稳定可靠、可维护性强等优点,为星载光学遥感相机的研究提供了行之有效的测试手段。

In the development of space borne optical remote sensing camera, the realization of circuit principle and the test of function are very important, the image simulator is a key experimental facility. The image simulator exports high--speed remote sensing image which is simulating the output of the camera, and also simulates the work mode and work flow. The image simulator adopts FPGA （field program gate array） to realize the systematic timing and logical control, and receives control commands by RS--422~ the high--speed image data sends to image collection and processing system by high-- speed LVDS interface, using Channel Link technology, and the data rate arrives at 4.2Gbps. The image simulator has advantages of flexible design, reliable and steady function, and strong maintainability. The image simulator is a very effective test approach for the development of space borne optical remote sensing camera.