摘要
文章主要讨论平台系统中运用的数据采集技术,提出了一种将Windows9x环境下的双缓冲和多线程技术应用于铁路区间移频自动闭塞信号采集,从而提高采集速度、保证采样精度的方法及其实现,为进一步的数据处理和频谱分析打下了良好的基础。文中还简述了Advantech多功能DAC卡的工作原理和基本应用过程,最后给出了用软件实现移频自动闭塞信号采集的实例。
The basic structure of railway block signaling system is introduced briefly at the beginning of this paper. Later, data acquisition technology in automatic block testing and assessment platform is mainly discussed. Double buffer and multi thread technology in Window9x are introduced into the data acquisition field of frequency-shift modulated signal to improve sampling rate and ensure its accuracy. All these lay a solid foundation for further signal process and spectrum analysis. The basic principal and application of Advantech multi-function DAC (Data Acquisition and Control) card is introduced, and finally a concrete software example of acquisition for frequency-shift modulated signal is given in this paper.
出处
《计算机测量与控制》
CSCD
2004年第8期728-731,共4页
Computer Measurement &Control
基金
铁道部科技发展计划项目(2001X005A
2002X007A)
