基于Visual C++的1780定时器采集卡内部晶振定时的实现  

Internal oscillator timing method basing on 1780card by Visual C++

作　　者：傅瑶[1] 薛旭成[1] 郝伟[1] 孙雪晨[1] 姜肖楠[1] 韩诚山[1] 

机构地区：[1]中国科学院长春光学精密机械与物理研究所,长春130033

出　　处：《国外电子测量技术》2014年第11期82-85,共4页Foreign Electronic Measurement Technology

摘　　要：PCI-1780定时器卡是一款多通道计数器/定时器卡。针对光栅尺数据采集中定时功能的需要,提出采用采集卡内部晶振定时。由于硬件计时常常需要外接信号源作为频率触发,依赖于外部硬件,不易实现。提出一种采用定时器卡内部晶振进行频率输出的方法实现定时功能,优点是不需要外接信号源,即不需要外接接线板,实现简捷。定时模块基于Visual C++实现,实验结果满足预期定时功能。经实验验证,定时模块运行良好,达到定时精度要求。PCI-1780 card is a multi-channel counter/timer card. When applying hardware timing function, external trig- ger signal source is needed as frequency. This paper presents a timer method using internal oscillator as frequency output to achieve timing function. The advantage is external signal source or external wiring board is not needed for this meth- od. Visual C＋＋ is applied for implementation. Results shows the timing function can be realized. The experiments proved this method running well and precision reached to target.

关 键 词：数据采集 定时 晶振 

分 类 号：TP273.5[自动化与计算机技术—检测技术与自动化装置] TN98[自动化与计算机技术—控制科学与工程]