Locomotive wheel diameter measuring method and device

The invention discloses a locomotive wheel diameter measuring method and device, and relates to the technical field of locomotive control. According to the method, line integration is carried out by using existing equipment of a locomotive, so that the wheel diameter information of the locomotive is obtained in real time; according to the method, rotating speed data of wheels are obtained through a speed sensor, the rotating speed data are transmitted to an LKJ system and a TCU system through a radar, and the LKJ system analyzes the rotating speed data to generate decoding information and transmits the decoding information to a CCU system; the TCU system judges whether wheels of the locomotive idle or not according to the rotating speed data and transmits a judgment result to the CCU system; and the CCU system measures the wheel diameter data of the locomotive wheels according to the decoding information and the idling information, and respectively displays and updates the wheel diameter data in the microcomp