自触发脉冲激光测距飞行时间测量研究

摘要

提出一种新型脉冲激光测距方法——自触发脉冲飞行时间激光测距方法。运用该方法有效解决了传统脉冲激光测距法中存在的提高测量精度和缩短测量时间两者之间的矛盾。对该方法及本质特点进行了详细描述和理论分析,并给出用于描述该方法的基本方程。其飞行时间测量系统的设计很大程度上决定了自触发脉冲激光测距的测量精度和测量速度。设计并实现了基于CPLD的自触发脉冲激光测距飞行时间测量系统。CPLD的使用提高了测量精度,并且结构简单,体积小,可靠性高,非常适合高性能便携式的激光测距仪。%Based on the self-triggering pulsed technique,a novel pulsed time-of-flight laser rangefinding method is proposed to improve the accuracy and measuring speed of laser distance measurement.The theoretical analysis is carried out,and three basic equations are presented to describe the methods.The ranging precision and measuring speed are decided by the design of the time-of-flight measurement system to great extent.A time-of-flight measurement system based on CPLD for self-triggering pulsed laser ranging is designed and implemented.Benefiting from the high speed of CPLD,the precision of laser rangefinder is improved.Furthermore,the time-of-flight measurement system is adapted extraordinarily to high performance portable pulsed laser rangefinder for its compactness,simple structure,and high reliability.