基于DMD的高帧频红外场景仿真系统设计

红外动态场景仿真技术在红外成像、跟踪和制导武器等系统的性能评估中起着重要的作用，基于数字微镜器件(Digital Micromirror Device, DMD)的红外场景产生方案是红外场景仿真技术中最具研究价值的一种方案。介绍了DMD的灰度调制原理和工作方式，在此技术基础上设计了基于TI公司的0.7XGA开发平台的DMD驱动程序。通过放大原图像，提高了仿真红外图像的对比度。最后根据探测器输出的积分时间信号和帧同步信号，提出了一种提高DMD投影频率的方案。该方案投影出的灰度图像的对比度有所提高，红外成像仪可以采集到清晰的灰度图像，且每一帧灰度图像的显示时间缩短至1.12 ms，相比于常规方式的7.87 ms有了很大的提高。

Design of High Frame Frequency Infrared Scene Simulation System Based on DMD

Dynamic infrared scene simulation technologies play important roles in the performance evaluation of infrared imaging, tracking and guided weapon systems. The infrared scene simulation technology based on Digital Micromirror Device (DMD) is of most research value among infrared scene generation schemes. The gray modulation principle and operation mode of DMD are presented. On this basis, the DMD driver based on TI''s 0.7 XGA DMD driver development platform is designed. The contrast of the infrared image is improved by magnifying the original image. Finally, a scheme for improving DMD projection frequency is proposed according to the integration time of detector output signals and the frame synchronization signals. The contrast of the gray level image projected by using this scheme is improved. The infrared imager can collect distinct gray images. Moreover, the display time of each gray image is reduced to 1.12 ms which is improved greatly compared with the 7.87 ms of conventional ways.