根据脉冲激光测距的基本原理，提出了一种结合等效采样和数值平均的数字式激光飞行时间测量方法。该方法灵活、精度高、抗干扰性能力强，克服了传统数字法测量的局限性，适合大批量手持式测距仪使用。

The principle of distance measurement in pulse laser rangefinder is described and analysis．A distance measurement based on sequential equivalent sampling and data averaging technology is introduced．This technology is suitable to potable laser rangefinder for its high SNR，high precision and high cost effective．