Apparatus for controlling line guide of automated material handling system and method thereof

A method of controlling line guide for preventing unmanned transport devices from colliding with each other in an automated material handling system which transports carriers among manufacturing facilities through the unmanned transport devices, comprising:

• a step in which an optical line is formed by installing a side light emission optical fiber in the whole section of the line of a confluence of a plurality of lines of lines for moving the unmanned transport devices, and the unmanned transport device performs wireless communication through one side of the optical fiber in the whole optical line section while moving on the optical line to transmit entry state or pass completion state information to a main confluence control device;
• a step in which the main confluence control device installed at the confluence is connected to one end of the optical fiber of the optical line and performs optical communication, to confirm an entry state or a pass completion state of the unmanned transport device through the optical fiber installed on the confluence optical line;
• a step in which the main confluence control device performs, when an entry state of a new unmanned transport device is confirmed through the optical fiber of the optical line, a function of optical communication connection to a sub-confluence control device installed in the new unmanned transport device;
• a step in which the main confluence control device determines whether the new unmanned transport device enters for the confluence, and generates a pass control signal for a passable state or an impassable state to all the unmanned transport devices positioned at the confluence through the optical fiber on the basis of predetermined priority;
• and
• a step in which the sub-confluence control device receiving the pass control signal performs an entry operation of the unmanned transport device thereof when receiving the pass control signal for the passable state, and performs a standby operation of adjusting driving speed of the unmanned transport device thereof when receiving the pass control signal for the impassable state.