Circuit and optical system design for high frame rate DMD infrared scene simulation equipment
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摘要: 针对红外半实物仿真试验中DMD红外景象仿真设备存在的时序同步、高帧频显示、光学匹配等使用问题，设计与研制了一套能够与常见被测红外凝视成像设备匹配使用的基于DMD的红外景象仿真设备。首先提出了合理可行的同步延时驱动方案和显示控制方案，设计与研制了同步信号处理电路和驱动电路，实现了仿真图像的时序同步和高帧频显示；其次根据常见被测红外凝视成像设备的光学参数，进行了光学系统设计与仿真，研制了照明光学系统和投影光学系统，实现了与常见被测红外凝视成像设备光学匹配。检测结果表明：该设备能够与多种被测红外凝视成像设备在时序上保持同步，并实现光学匹配，输出的仿真图像帧频可达300 Hz、最大可模拟温度为160℃、最小可模拟温差为0.03℃、最大图像对比度为0.7、空间非均匀性优于1%，已在红外半实物仿真试验中发挥了巨大作用。Abstract: To improve the application question of the timing synchronization, high frame rate display and optical match caused by infrared scene simulation equipment based on DMD in the hardware-in-the-loop simulation test, a novel infrared scene simulation equipment based on DMD which can match application with several kinds of common infrared staring imaging system was designed and constructed. Firstly, the scheme of synchronization delay driving and the scheme of display control were proposed. The synchronization signal processing circuit and the driving circuit were designed and developed, the timing synchronization and high frame rate display were realized. Then, according to parameters of optical system of several kinds of common infrared staring imaging system which will be tested, the lighting optical system and the projection optical system were designed, developed and simulated, optical match with several kinds of common infrared staring imaging system was realized. Test results indicate that the equipment can realize timing synchronization and optical match between the equipment and several kinds of common infrared imaging system, the frame rate of the simulation image is 300 Hz, the maximum simulation temperature of the simulation image is 160℃, the minimum simulation temperature of the simulation image is 0.03℃, the maximum contrast of the simulation image is 0.7, the nonuniformity of the simulation image is 1%, the equipment play a key role in a large number of hardware-in-the-loop simulation tests.
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Key words:
- infrared simulation /
- infrared scene generation /
- DMD /
- key techniques /
- test
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