便携式区间自动闭塞电气参数测试仪的研究

A Study of the Electric Parameter Meter of Automatic Section Block

区间闭塞系统是铁路信号的重要组成部分,区间闭塞系统设备的运行状态直接影响到铁路运输安全和运输效率。结合我国目前铁路广泛使用的交流计数和移频自动闭塞系统,基于铁路现场的实际需求,就区间自动闭塞电信号的检测方案进行了设计,确定选择以差分解调算法来实现对移频信号的解调和以时域处理方法检测交流计数信号的方案。在此基础上,完成了以DSP为处理核心、以CPLD为控制单元的便携式区间自动闭塞电气参数测试仪的系统硬件设计和软件设计,用制成的样机进行了现场试验。实验证明,系统完全满足技术指标要求,达到了铁路现场的使用要求。

Section block system is an important part of railway signal for the smooth running of its equipment has a direct imfluence on the safety and efficiency of railway transport. Base on the requirement of railway, a test project of electrical signal of automatic section block was designed combined with aboard used AC counter and automatic block system of shift frequency in our railway; and a set of schemes decide to use the demodulation of the change-freqency signal by different demodulation arithmectic and test AC counter signal by time field dispose method. Based on the methods, the hardware and software design of system that the electric parameter meter of automatic section bock takes the DSP as kernel and the CPLD as control unit, then a locale test was conducted with a sample machine. The result proved that the system met the requirement of technology and railway use.