| 摘要 |
In accordance with the equipment of the present invention, the communication over the entire region of a wide working site can be performed without a cost increase due to the installation of auxiliary equipment, the mutual control of vehicles can be performed with a light burden on a monitoring station without sacrificing safety, and when a failure occurs to transmission/reception equipment, the failure can be quickly and accurately confirmed, and accordingly the abnormality can be quickly and properly dealt with. In the of the present invention, first transmission/reception system for transmitting/receiving at least command data between the monitoring station and a plurality of vehicles via a first communication system which enables wireless communication over the distances between the monitoring station and the vehicles is provided in the monitoring station and the vehicles respectively. Second transmission/reception system for transmitting/receiving position data measured by vehicle position measurement between the vehicles via a second communication system which enables wireless communication over the distances between the vehicles and enables faster data transmission/reception than the first communication system is provided in the vehicles respectively. The respective vehicles judge the approach of another vehicle by transmitting position data between the vehicles via the second transmission/reception system provided in the vehicles respectively, so that the mutual position relationships between the vehicles can be monitored. |
