By processing real - time digital analog fault vibration signal and adopting minimum quadric multiplication and rectangle function , correct frequency chart will be gained . thus , the system design based on advanced dsp can be applied to the real - time fault diagnosis of rolling bearing in modern high - speed train 通过对采集的模拟的有故障振动信号进行在线实时数字信号处理,并在信号分析方面采用了最小二乘法及加窗函数,以获得正确的频谱,通过信号处理,并进行结果比对,进而可证明此系统在高速列车转向架滚动轴承在线诊断中应用的可行性。
The thesis includes the design of hard circuit , pcb ( printed circuit board ) , driver and application soft involving a / d board and d / a board . the detailed functional modules consist of multiplex signals select module 、 analog digital conversion module 、 digital analog conversion module 、 pci protocol conversion module 、 driver and magnifying module 、 control logic 、 clock circuit and configuration circuit . the importance of the thesis is a / d board 本课题包括硬件电路、印刷电路板( pcb ) 、驱动程序和应用软件的设计,涉及a / d板和d / a板两大块部分,具体的功能模块包括多路信号选择模块、模数转换模块、数模转换模块、 pci协议转换模块、驱动放大模块、控制逻辑、时钟电路和配置电路,其中重点是a / d板部分。