All along, the maintenance of the freight car was completed by men, so the fault detection quality was affected by the quality of workers, psychological state and human fatigue level, so the traditional fault detection way to is a big security risks to the traffic, in order to promote the modernization of the railway, improve the fault detection rate, protect the safety of railway operations, the Ministry of Railways promote a set of automatic security system, it is the Running Trouble of Freight Car Detect...