红外Cameralink相机合成信号源设计

Design of Composite Signal for Cameralink-camera

光电跟踪设备与控制舱之间图像数据和控制信息的传输对光电设备正常工作是至关重要的。为了在实验室完成对光电跟踪设备的传输系统的模拟调试,设计了图像数据和附加信息的合成信号源。本设计基于CameraLink接口的相机,以Altera公司的FPGA为核心,配合CameraLink接口电路、附加信息的串口转换电路完成硬件设计;FPGA采用两个内部DPRAM配合工作,均使用不同读写时钟,通过控制读写使能和地址变换完成图像数据和附加信息的逻辑设计。结果显示系统在外同步信号控制下,正确完成信息合成,可由图像采集卡正确采集和显示。

The image-data and control-data transmitted between Electro-optical tracking e- quipment and control-room is very important. In order to test the transmission of Electro-optical tracking equipment in the lab, the signal-generator which simulate the image-data and control-da- ta was designed. Based on camera with cameralink interface, the design incorporate Altera Arria II GX series FPGA as the core and add the cameralink interface and control-data circuit which changes TTL into LVDS; FPGA works with two internal DPRAM, both using different read and write clock and controlling the read and write enable and address translation with completed data synthesis of logic design. The result shows that the system works well when the external signal is applied, completing the information integration correctly, which can be captured and displayed by frame gather.