条纹管激光成像雷达数据处理系统分析与设计

Analysis and Design of Data Processing System Based on Streak Tube Imaging Lidar

条纹管激光成像雷达(STIL)的大视场、高帧频、高空间分辨率和时间分辨率等特点要求其数据处理系统具有相应的高性能。通过简要分析条纹管激光成像雷达数据处理的内容及性能要求,对条纹管激光成像雷达数据处理系统进行了分析和设计。简要介绍了条纹管激光成像雷达的典型系统结构,通过详细分析条纹管激光成像雷达数据处理内容,将所需处理的数据分为延时触发信号和条纹图像两类分别进行研究。根据系统指标要求,对比不同时序控制方案的优缺点,设计了基于Altera可编程控制(CPLD)的高精度可调谐数字延时控制子系统,以保证系统各部件严格按既定时序运作,实时捕获目标条纹图像并进行处理;通过对比不同的图像处理系统实现方案,分析系统硬件成本、建立周期和开发难度等因素,设计了以智能相机为核心的条纹图像处理系统。在此基础上,初步建立起条纹管激光成像雷达数据处理硬件平台。

In view of features of streak tube imaging lidar （STIL）, such as wide vision, high frame frequency, high spatial and time revolution, the corresponding high performance of the data processing system was demanded. By the analysis of the content and capability, the data processing system based on STIL was analyzed and designed. The structure of data processing system based on STIL was introduced, and by the detailed analysis of the content of data processing, the processing data styles including time-delayed trigger signal and streak imaging were separately studied. Then according to the demand of the system index and the contrast of different controlling methods, high precision and tuned digital time-delayed controlling sub-system based on Altera complex programmable logic device （CPLD） was designed in order to ensure every part of the system operating strictly on the timing, capture the streak imaging of the object real time and do the processing. By the contrast of different imaging system methods and the analysis of factors including the hardware cost, establishment cycle and exploitation difficulty, STIL system taking the smart camera for its core was designed. The hardware platform of data processing system based on STIL was initially built.