基于动态故障检测的铁路信号发码器及其ASIC实现

Dynamic Fault-Detection Based Railway Signal Transmitter and its ASIC Implementation

故障安全系统中的大部分设计是为了检测和发现故障,引导系统输出安全信息。在铁路信号发码器中采用了一种动态故障检测技术,它是一种针对硬件功能模块的故障检测方法,通过动态地向硬件功能模块加载已知输入数据,检查其是否在预期时刻输出预期数据,从而判断硬件功能模块本身是否工作正常。文章介绍了这种技术的模型,分析了它的性能,并描述了基于这种技术的铁路信号发码器的单片ASIC实现。

The most part of the design in the Fail-safe system is to detect and discover faults,and lead the system to output safe information.A kind of dynamic fault-detection technology is adopted in Railway Signal Transmitter,which is a fault-de-tection method for hardware function modules.By dynamically loading known input data upon the hardware module and checking whether the expected data appear at expected time,it is determined whether the hardware module is working normal-ly.This paper introduces the model of this technology,analyses its performance,and depicts the single-chip ASIC implementa-tion of the railway signal transmitter.