论文部分内容阅读
基于Xilinx XC2V3000芯片设计了一种应用于星载多通道快速激光三维成像雷达中的抗辐照增强型时间-数字转换(Time-to-Digital Converter,TDC)系统。单板2片FPGA内实现了16通道高精度时间间隔测量。采用了多延时链冗余结构,每个测时通道由3个物理测时链路组成,最后通过三模冗余增强抗单粒子翻转能力。并应用了通道均匀性校准修正技术,解决了多通道测时均匀性问题。实验结果表明,系统测时精度达到62.9 ps,通道一致性较好,满足激光雷达三维成像要求,同时该技术方案具有低功耗、轻量化等特点。
Based on the Xilinx XC2V3000 chip, an anti-radiation enhanced time-to-digital converter (TDC) system is designed for the spaceborne multi-channel fast laser three-dimensional imaging radar. Two 16-channel high-precision time interval measurements on a single board within two FPGAs. Adopting multi-delay chain redundancy structure, each time-measuring channel consists of 3 physical time-measurement links, and finally enhances anti-single-particle turnover capability through triple-mode redundancy. And applied channel uniformity correction correction technology to solve the problem of uniformity of multi-channel time measurement. The experimental results show that the accuracy of the system is 62.9 ps and the channel consistency is good, which meets the 3D imaging requirements of LIDAR. Meanwhile, the scheme has the characteristics of low power consumption and light weight.