文中介绍了为建立目标和背景的激光反射特性数学模型而研制的用于脉宽几十纳秒的数据采集系统的设计和工作方式。针对测量窄脉冲信号幅值及实现不间断连续采集过程的使用目的，将窄脉冲回波信号的峰值展宽成100μs的方波，以系统设置的发射基准信号或回波信号自身作为采集的同步控制信号，并将基准信号展宽为5～50μs的方波，以其上升沿触发采集，实现发射与采集同步，提高了采集存储的有效性；而且，在作用距离范围内，不管目标或背景位于多远处，都能保证于脉宽峰值处采集，保证了采集精度。系统的各项技术指标均达到使用要求并经过了测试试验验证。

In this paper, designconsiderations and working style of data sampling and processing system for severaldecades nanoseconds laser reflective wave narrow pulse signal are provided. The system isdeveloped for building laser reflective characteristics mathematics model of target andbackground. In the design, the narrow pulse is expanded into 100μs square wave in its peak, in order to measure altitude ofthe pulse and sample continously for a long time. The sample is controlled by base signalor itself. The base signal or reflective wave signal is expanded into 5～50μs square wave and the sample is triggered by its riseedge. So the sample can be synchronized with transmitting. The effectiveness of samplingand storing is improved. Wherever target and background is in effective distance, pulsepeak can be sampled. Sampling precision is assured. Technical characteristics of thesystem are up to use request, and confirmed by field test.