【摘要】 针对红外热像仿真系统中高精度图像数据生成和高速传输问题,提出采用ARM9微处理器为核心,辅以FPGA、SDRAM、高精度DA的仿真测试平台实现方案。在WinCE操作系统下完成红外图像生成和处理,通过SDRAM缓存图像数据,在FPGA控制下,实现数据的高速转发和高精度的数模转换。该平台实现了红外探测器图像模拟和高速传输,并且能够灵活配置红外场景、噪声分布等参数。现场运行表明,该平台实现了20MB/s的写入速度和200MB/s的数据读出速度,DA转换精度优于0.8mV,能够有效替代红外探测器的实际信号输入。更多还原

【Abstract】 In order to solve the problem of high accuracy data generation and high speed transmission,a design based on ARM9 assisted with FPGA,SDRAM and high precise DA is introduced.The infrared image generation and process are accomplished under WinCE.Then the data are cached in SDRAM,and transferred at high speed under the control of FPGA.The simulator can generate and transfer infrared image data at high speed,and it can also configure parameters such as infrared scene and noise distribution.The in-field test indicates that this infrared signal simulator achieves the writing rate of 20MB/s,the peak reading rate of 200MB/s and the analog signal output accuracy of 0.8mV.The simulator can replace the infrared detector efficiently.更多还原