The OHT management system comprising:
- a rail configured in a plurality to be connected to each other;
- an OHT configured in a plurality and driving autonomously on the rail;
- a work terminal which generates a work progress information during a work procedure for proceeding with an inspection by closely approaching the rail within a predetermined distance and including a work ID value and a signal strength value;
- and
- an OCS which communicates with the OHT to set an interlock information of the OHT according to each region at which the OHT autonomously drives, which communicates with the work terminal to turn on an interlock information at which the work terminal is positioned among the interlock information so the OHT does not drive if the work state information is input;
- a repeater configured in a plurality, which each of the plurality are configured to further include repeater ID values which correspond to each interlock information, and which is input with the work ID value and the signal strength value, which is positioned spaced apart from each other according to each region at which the plurality of rails are installed, and which transfers the work progress information from each of the plurality to the OCS, if the work state information is generated at the work terminal;
- a maintenance lift at which the work terminal is positioned, and which includes a lifting apparatus for adjusting a height of a work position and a driving apparatus for moving the work position;
- a fastening part which is provided attachable and detachable to the maintenance lift, and which satisfied a generation condition of the work state information only if attached to the maintenance lift;
- a pressure sensor which is coupled to the fastening part, which generates a pressure signal if a pressure is put on a fastening area during a fastening of the fastening part to the maintenance lift, and of the work state information is generated at the work terminal if a generated pressure signal is transmitted to the work terminal;
- a detection sensor coupled to the fastening part, which generates a detection signal by detecting a state of which the maintenance lift is positioned at a fastening region of the fastening part, and of which the work state information is generated at the work terminal if a generated detection signal is transmitted to the work terminal;
- a height sensor electrically connected to the work terminal, which generates a height value by measuring a height of the work terminal, which transmits the generated height value to the work terminal, and of which the work state information is generated at the work terminal if the height value is input and the height value is the same or higher than a predetermined value;
- and
- a weight sensor electrically connected to the work terminal, which generates a weight value by detecting a weight, which transmits the generated weight value to the work terminal, and of which the work state information is generated at the work terminal if the weight value is input and the weight value is the same or higher than a predetermined value, and
- the OCS is input with the repeater ID value, the work ID value, and the signal strength value from the repeater, detects the repeater ID value of the repeater which transmits a largest signal strength value among the repeater ID value, the work ID value, and the signal strength value which is input, changes the interlock information to a turn-on state so the OHT does not enter within the interlock information which corresponds to the repeater ID value which is detected.