张雪敏, 苏宇. 无人机异步图像数据采集系统设计[J]. 应用光学, 2010, 31(2): 229-232.
引用本文: 张雪敏, 苏宇. 无人机异步图像数据采集系统设计[J]. 应用光学, 2010, 31(2): 229-232.
ZHANG Xue-min, SU Yu. Design of asynchronous image data acquisition system for unmanned aerial vehicles (UAVs)[J]. Journal of Applied Optics, 2010, 31(2): 229-232.
Citation: ZHANG Xue-min, SU Yu. Design of asynchronous image data acquisition system for unmanned aerial vehicles (UAVs)[J]. Journal of Applied Optics, 2010, 31(2): 229-232.

无人机异步图像数据采集系统设计

Design of asynchronous image data acquisition system for unmanned aerial vehicles (UAVs)

  • 摘要: 针对无人机遥感要求高空间分辨率、高光谱分辨率和高时间分辨率且体积小、重量轻,采用离轴三反消像散光学系统满足其大视场轻量化设计要求。提出各相机异步工作,采用单片现场可编程门阵列(FPGA)实现各异步相机数据整合并以同一参考时钟同步实时输出。介绍了整个异步图像数据采集系统的结构,采用FPGA内部的异步先进先出(first in first out, FIFO)实现两路不同时钟域数据按接收端时钟同步输出,在Xilinx ISE7.1环境下用Modelsim6.1进行了时序仿真,并进行了实际测试。实验结果表明:系统稳定可靠,整个成像系统焦距f=70mm,相对孔径D/f=1/6,视场角2w=65。采用两组线阵CCD相机工作,总重量仅6kg。

     

    Abstract: In order to meet the requirements of high space resolution, high spectral resolution, high time resolution, small volume and light weight for the remote sensing of pilotless planes, the off-axis three-mirror anastigmatic optical system is adopted. The asynchronous working mode is proposed for two cameras. The integration of data from the asynchronous cameras and the synchronous real-time output were realized by FPGA. The structure of the entire asynchronous image data acquisition system is introduced. The time sequence simulation was carried out with Modelsim 6.1 in the environment of Xilinx ISE7.1, and then the actual testing was performed. The experimental results show that the system is stable and reliable. Its focal length is f=70mm, relative aperture is D/f=1/6, angle of FOV is 2w=65and total weight is 6kg.

     

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