Portable locomotive oscillation fault detector

The utility model discloses a portable locomotive vibration fault detector which comprises a portable microcomputer, a vibration data acquisition unit and a sensor collecting unit, wherein, an FPGA core control unit of the vibration data collector is connected with a central processing unit, a DDS waveform synthesis unit, an SRAM high-speed data buffer unit, a signal conditioning and data acquisition unit, a pulse shaping and isolating circuit unit and a vibration sensor drive unit by an IIC bus; and a sensor collecting unit comprises a vibration sensor and a photoelectric revolution speed sensor which respectively transform vibration signals and revolution speed signals into electrical signals for being used by the vibration data collector. The portable locomotive vibration fault detector can realize the record, analysis, storage and query of acquired data of a portable machine, and carry out comprehensive analysis of the data. The fault detector can accurately detect faults of a locomotive traction motor an