Locomotive voltage collecting and recording system

The invention discloses a locomotive voltage collecting and recording system comprising a master recording module, a power source module, a conversion isolation module, and an operation display module. The input of the power source module is a locomotive power source. The power source module provides electric power for the master recording module and the conversion isolation module. With the conversion isolation module, 1-4 measured voltage input signals are sampled, the measured voltage input signals are subjected to isolated conversion, and the converted voltages are outputted to the master recording module. When any measured voltage input signal exceeds a preset normal range, the master recording module displays a fault alarm signal through the operation display module, and a buzzer provides a sound alarm signal. With the system provided by the invention, solutions can be provided for real-time displaying, recording, and ground analysis of various 0-180V direct-current voltages on a locomotive, such that a