红外, 2014, 35 (4): 18, 网络出版: 2014-04-28
基于恒比定时鉴别的激光雷达时间测量前沿技术研究
Research on Advanced Technology of Time Measurement for LIDAR Based on Constant-fraction Discrimination
机载激光雷达 恒比定时 时间测量 抽头延迟线法 airborne LIDAR constant-fraction discrimination time measurement tapped delay line method
摘要
通过FPGA设计了基于恒比定时时刻鉴别直接实现机载激光雷达时间测量系统的方案。详细阐述了时刻鉴别尤其是恒比定时时刻鉴别的原理及性能特点,对传统恒比定时时刻鉴别误差进行了估算,并设计了恒比定时时刻鉴别的简易电路。最后给出了通过抽头延迟线法实现机载激光雷达时间测量的初步方案,对后期提高该时间测量系统的精度提出了改进意见。
Abstract
A time measurement system for an airborne LIDAR based on constant-fraction discrimination is designed by using FPGA. The principle and characteristics of time discrimination, especially of constant-fraction discrimination are described in detail. The error of the traditional constant-fraction discrimination is estimated and a simple circuit for constant-fraction discrimination is designed. Finally, a preliminary scheme for implementing time measurement for a LIDAR by using a tapped delay line method is given. Some suggestions on the improvement of the time measurement system in accuracy are made.
许万鹏, 黄庚华. 基于恒比定时鉴别的激光雷达时间测量前沿技术研究[J]. 红外, 2014, 35(4): 18. XU Wan-peng, HUANG Geng-hua. Research on Advanced Technology of Time Measurement for LIDAR Based on Constant-fraction Discrimination[J]. INFRARED, 2014, 35(4): 18.