机车车载信号采集系统是机车车载故障诊断系统的重要组成部分。迅速准确地采集机车运行状态信息,对机车的安全运行至关重要。针对SS4改型电力机车,设计主电路信号采集系统,该系统以12位A/D转换器ADS774为基础,以P87C591单片机为核心处理器,能够实时采集机车状态数据,并通过CAN总线进行通信,能够及时反映机车运行状态,为机车的检修与故障诊断提供了重要依据。 Locomotive vehicle signal acquisition system is a locomotive vehicle fault diagnosis system is an important part. Quick and accurate collection of locomotive running status information is crucial to the safe operation of the locomotive. For the SS4 modified electric locomotive, the main circuit signal acquisition system is designed. The system takes the 12-bit A / D converter ADS774 as the basis and the P87C591 MCU as the core processor, which can collect the locomotive status data in real time and communicate through the CAN bus, It can reflect the running status of the locomotive in time and provide an important basis for overhauling and fault diagnosis of the locomotive.