基于HY940行车录音仪实时时钟系统研究  

Research on System of Real Time Clock in HY940 Train Recorder

作　　者：钱国明[1] 

机构地区：[1]上海铁路局上海通信段,上海200434

出　　处：《数字技术与应用》2014年第9期67-68,共2页Digital Technology & Application

摘　　要：本文以北京恒业公司HY940行车录音仪为基础,根据其在应用中存在时钟漂移,经常出现时钟走时不准确这一现象,充分利用通信传输设备具有高精度时钟的优点,对现有设备进行改进,在不改变原有设计的基础上,增加了部分硬件及软件,使之能自动对传输设备的时钟进行同步,增加了实时时钟的精度,减轻了维护人员的工作量。This paper is based on Train Recorder made by Hengye Co.ltd.Beijing,considering that it exits clock drifting and timing is not accuracy in practice. It makes the best of high accurate clock supplied by transmission equipment of communications,improving existing devices and not changing the original designed constructure. Some hardware and software are partly added in this thesis,in order to synchronizing the clock outputed by transmission devices leading to increase the accuracy of the real time clock,al eviating the workload of maintainer.

关 键 词：实时时钟 准确度 同步计数器 

分 类 号：TN492[电子电信—微电子学与固体电子学]