精密时间间隔测量方法的改进  

An Improved Method for Precision Time Interval Measurement

作　　者：于建国[1] 陈明[1] 周渭[2] 刘海霞[2] 

机构地区：[1]西北工业大学 [2]西安电子科技大学

出　　处：《宇航计测技术》2003年第3期15-20,共6页Journal of Astronautic Metrology and Measurement

摘　　要：用于短时间间隔测量的量化时延法可显示较高的测量分辨力。然而 ,随着测量分辨力的提高 ,则需要更多的延迟组件和附加电路 ,这样不但设备的复杂度增加 ,而且还会产生附加误差 ,测量分辨力受到限制。提出一种改进方法 ,即在量化测量原理的基础上 ,利用细测与粗测相结合的方法来测量精密时间间隔。这种方法与CPLD相结合 ,可以在使用较少数量的延迟组件情况下 ,获得得 4 0 0ps的测量分辨力。Quantized time delay method used to measure a short time interval can show a high resolution. However, to obtain a higher resolution much more delay components and additional circuits must be used and with this way the additional errors will be generated and measuring resolution is limited. This paper introduces a method of fine measurement combined with coarse measurement to measure precision time interval. With the method and combined with a CPLD device, around 400 ps measuring resolution can obtained.

关 键 词：精密时间间隔 量化时延法 测量分辨力 可编程逻辑器件 集成延时单元 测量精度 

分 类 号：TM935.1[电气工程—电力电子与电力传动]