Abstract: The remote control system for underground load-haul-dump vehicles (ULHD) is composed of a   wireless data transmission system and an onboard computer control system. The wireless data transmission system adopts two professional data transmission radio sets for the transmission of vehicle status information inspection and control signals and the data transmission of video monitoring devices. The onboard computer system adopts a distributed control system and an asynchronous communication mode. The upper PC receives the remote control command from the remote control room and interprets, decomposes and transmits it to the lower PLC, which will execute the command to control the ULHD's operation.

Key words: ULHD, remote control system, data communication, reliability design