红外焦平面探测器模拟装置设计

摘要

Because infrared focal plane detector is very expensive and careless damage will bring huge economic los-ses,an infrared FPA detector simulator is designed.It adopts an overall structure of CMOS sensor,DSP and FP-GA.The sensor produces visible light image to transmit to DSP,and then the data are written into DRAM after pro-cessing image data.FPGA reads data and stores into DDR.According to the MC,INT signals and configuration mode, such as window size and position,FPGA generates DV signal and controls DAC to convert image data into four channel analog signals.The result shows that the simulator can simulate functions of the detector and effectively reduce the risk and improve testing efficiency.%红外焦平面探测器价格昂贵，不慎损坏将带来巨大的经济损失，使用探测器模拟装置进行调试可以降低风险，装置采用 CMOS 传感器＋DSP ＋FPGA 的体系结构。传感器产生1280×1024可见光图像发送给 DSP，DSP 对数据处理后写入双端口存储器，FPGA 读取数据并缓存后根据收到的 MC、INT 信号及窗口尺寸和位置等配置情况对缓存的图像进行开窗，生成DV 等信号并控制数模转换器将图像数据转换为四路模拟信号输出，FPGA 控制模数转换器对接口电路电源进行检测。实验结果表明，模拟装置能够较全面模拟探测器各项功能和工作模式，可以有效降低装调风险并提高测试效率。