The factory's materials are mainly transported by rail. After unloading by the car dumper, a small amount of materials remain in the carriages, which requires manual cleaning of residual materials (coke, coal, etc.) and transportation of the cleaned materials. The labor intensity is high, and there are significant safety hazards when workers get on and off the train cars (subsequently, for unloading 20-foot general open-top containers (TBJ), manual cleaning of the car bottom is impossible). Therefore, it is necessary to replace manual cleaning with intelligent equipment for sweeping and transporting residual materials in the carriages.