摘要
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 10 0 μs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～ 50 μs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。
In this paper, design considerations and working style of data sampling and processing system for several decades nanoseconds laser reflective wave narrow pulse signal are provided. The system is developed for building laser reflective characteristics mathematics model of target and background. In the design, the narrow pulse is expanded into 100μs square wave in its peak, in order to measure altitude of the pulse and sample continously for a long time. The sample is controlled by base signal or itself. The base signal or reflective wave signal is expanded into 5～50μs square wave and the sample is triggered by its rise edge. So the sample can be synchronized with transmitting. The effectiveness of sampling and storing is improved. Wherever target and background is in effective distance, pulse peak can be sampled. Sampling precision is assured. Technical characteristics of the system are up to use request, and confirmed by field test.
出处
《红外与激光工程》
EI
CSCD
北大核心
2001年第1期40-42,共3页
Infrared and Laser Engineering
关键词
激光反射特性
数据采集
激光引信
Laser reflective characteristics
\ Data sampling
Narrow pulse signal
\ Reference signal
\ Signal stretching
