摘要
激光测高仪是测量激光脉冲的飞行时间来获得测高仪与探测目标之间的距离,因此激光飞行时间测量的准确性是衡量其系统能力的根本指标．采用了一种专用的时间数字转换芯片设计了时间间隔测量模块,它采用延时线技术,测量频率快,时间分辨率高,受外界环境干扰小,完全适合激光测高的要求．在给出软硬件实现方法的同时,也给出了测量结果．
Pulsed time-of-flight laser altimeter operates by transmitting a short laser pulse to an optical visible target and by detecting the reflected pulse with an optical detector. The measured distance is calculated from this flight time. So the accuracy of laser time interval is a basic beacon to measure its system capability. We use a special time-digit.al-converter chip to develop a high resolution time interval module. Based on delay chain; it has high frequency and precision, suffer no outside environmental interference, completely suite for laser altimeter. Finally the soft and hardware realization method and measurement result are given.
出处
《量子电子学报》
CAS
CSCD
北大核心
2007年第1期96-99,共4页
Chinese Journal of Quantum Electronics
关键词
光电子学
激光测高
时间间隔测量
延时线
optoelectronics
laser altimetry
time interval measurement
delay chain
