The Design of Train's Impulse Analyzer Based on USB Interface MO Yi min, ZHAO Gang,XIAO Jun (School of Mechanical and Electronic Engineering,Wuhan University of Technology,Wuhan 430070,China)The paper introduced a kind of train's impulse analyzer based on Universal Serial Bus (USB) where a practical solution was presented. It included the design of system hardware, firmware, USB interface driver and application. The system had the performances of high reliability, full functionality and friendly human machine interface and acquired good results in real application.USB; firmware; driver; impulse