激光通信光斑图像高速采集与实时处理系统  

High Speed Acquisition and Real-time Processing System for Laser Communication Spot Image

作　　者：王莹[1] 伞晓刚[2] Wang Ying;San Xiaogang(Changchun Vocational Institute of Technology,Information Technology Branch,Changchun,Jilin130033,China;Changchun Institute of Optics,Fine Mechanics and Physics,Chinese Academy of Sciences,Changchun,Jilin130033,China)

机构地区：[1]长春职业技术学院信息技术分院,吉林长春130033 [2]中国科学院长春光学精密机械与物理研究所,吉林长春130033

出　　处：《应用激光》2020年第1期124-128,共5页Applied Laser

基　　金：教育部职业院校课题-2018-2020年信息化教学研究课题(项目编号:2018LXB0130)。

摘　　要：为了解决激光通信系统中对信标光捕获、跟踪与对准的高实时性技术难题,设计了基于FPGA的高速激光光斑采集与处理系统。首先,采用高速摄像机与FPGA设计了激光光斑采集与处理硬件电路。然后,采用中值滤波与形态学滤波对图像进行背景抑制和目标增强。最后,对滤波后的图像分别计算光斑的形心和质心,并通过加权平均后将光斑中心位置传输至控制系统中,控制快速反射镜完成对目标的跟踪。所设计系统的实时提取像素分辨率为256×256,帧频为10 000 Hz。实验结果表明,所设计系统能够对包含激光光斑目标的超高帧频图像进行实时处理,能够提高基于快速反射镜的闭环控制带宽。In order to solve the technical problem of high real-time beacon acquisition, tracking and alignment in laser communication system, a high-speed laser spot acquisition and processing system based on FPGA is designed. Firstly, the hardware circuit of laser spot acquisition and processing is designed by using high-speed camera and FPGA. Then, median filtering and morphological filtering are used to suppress the background and enhance the target. Finally, the centroid and centroid of the spot are calculated respectively for the filtered image, and the centroid position of the spot is transmitted to the control system by weighted averaging. The fast mirror is controlled to track the target. The real-time extraction pixel resolution of the system is 256 x 256, and the frame rate is 10 000 Hz. The experimental results show that the designed system can process the ultra-high frame rate images containing laser spot targets in real time and improve the closed-loop control bandwidth based on fast reflector.

关 键 词：激光通信 高速采集 现场可编程门阵列 实时处理 

分 类 号：TN271[电子电信—物理电子学]