OHT management system and control method for OHT management system

1 . An overhead hoist transport (OHT) management system comprising:

a rail;

an OHT configured to drive autonomously on the rail;

a work terminal configured to generate work progress information during a work procedure based on an input of one or more sensors during an inspection of the rail within a set distance; and

an OHT control system (OCS) configured to communicate with the OHT and the work terminal, and the OCS is configured to generate interlock information based on the work progress information of the work terminal,

wherein the OCS is further configured to prevent the OHT from driving in a section at which the work terminal is positioned based on the interlock information, and

wherein the interlock information includes

node information corresponding to each region of the rail, and

an interlock setting indicating a driving state or a non-driving state for each region of the rail.

2 . The OHT management system of claim 1 , wherein

the rail is included in a plurality of rails which are connected to each other,

the OHT is included in a plurality of OHT, and

the OHT management system further includes a plurality of repeaters, the plurality of repeaters being spaced apart from each other and each of the plurality of repeaters corresponding to a region of each of the plurality of rails, and the plurality of repeaters configured to transfer the work progress information to the OCS based on the work progress information being generated by the work terminal.

3 . The OHT management system of claim 2 , wherein the OCS is configured to generate the interlock information based on a region at which the OHT drives autonomously, and update the interlock information based on a position of the work terminal.

4 . The OHT management system of claim 2 , wherein

each of the plurality of repeaters further comprises a repeater ID value,

the work terminal further comprises a work ID value and a signal strength value,

the work terminal is configured to transmit the work ID value and the signal strength value to each of the plurality of repeaters based on the work progress information being transmitted, and

the OCS is configured to

communicate with each of the plurality of repeaters to receive the repeater ID value, the work ID value, and the signal strength value,

detect a largest signal strength value among each signal strength value of the plurality of repeaters and transmit the repeater ID value, the work ID value, and the signal strength value from one of the plurality of repeaters corresponding to the largest signal strength value, and

transmit the interlock information corresponding to the detected largest signal strength value among the plurality of repeaters.

5 . The OHT management system of claim 1 , further comprising:

a maintenance lift configured to be coupled with the work terminal.

6 . The OHT management system of claim 5 , further comprising:

a fastening part configured to be attachable and detachable to the maintenance lift.

7 . The OHT management system of claim 6 , further comprising:

a pressure sensor of the one or more sensors coupled to the fastening part and configured to generate a pressure signal based on a pressure being applied to the pressure sensor during a fastening of the fastening part to the maintenance lift, and the pressure sensor configured to transmit the pressure signal to the work terminal,

wherein the work terminal is configured to generate the work progress information based on the pressure signal being transmitted to the work terminal.

8 . The OHT management system of claim 6 , further comprising:

a detection sensor of the one or more sensors coupled to the fastening part, the detection sensor configured to generate a detection signal based on a portion of the maintenance lift being detected in a fastening region of the fastening part, and the detection sensor configured to transmit the detection signal to the work terminal,

wherein the work terminal is configured to generate the work progress information based on the detection signal being received by the work terminal.

9 . The OHT management system of claim 5 , wherein the maintenance lift further includes a lifting apparatus configured to adjust a height of a work position.

10 . The OHT management system of claim 5 , wherein the maintenance lift further includes a driving apparatus configured to move a work position.

11 . The OHT management system of claim 1 , further comprising:

a height sensor of the one or more sensors electrically connected to the work terminal, the height sensor configured to generate a height value by measuring a height of the work terminal and transmit the height value to the work terminal,

wherein the work terminal is configured to generate the work progress information if the height value is a same height value or above a set height limit value.

12 . The OHT management system of claim 1 , further comprising:

a weight sensor of the one or more sensors electrically connected to the work terminal, the weight sensor configured to generate a weight value by detecting a weight and transmitting the weight value to the work terminal,

wherein the work terminal is configured to generate the work progress information based on the weight value being a same weight or above a set weight limit value.

13 . An overhead hoist transport (OHT) management system comprising:

a plurality of rails configured to be connected to each other;

a plurality of OHT configured to drive autonomously on the plurality of rails;

a work terminal configured to generate work progress information during a work procedure based on an input of one or more sensors during an inspection of one or more of the plurality of rails within a set distance, and the work terminal including a work ID value and a signal strength value;

an OHT control system (OCS) configured to communicate with the plurality of OHT, and the OCS configured to generate interlock information to prevent each of the plurality of OHT from driving in a region at which the work terminal is positioned based on the work progress information;

a plurality of repeaters spaced apart from each other and corresponding to each region of the plurality of rails, each of the plurality of repeaters including a repeater ID value corresponding to the interlock information, the repeater ID value configured to be transmitted to the OCS with the work ID value and the signal strength value, and the plurality of repeaters configured to transfer the work progress information from each of the plurality of repeaters to the OCS based on the work progress information being generated at the work terminal;

a maintenance lift configured to be coupled with the work terminal, the maintenance lift including a lifting apparatus configured to adjust a height of a work position and a driving apparatus configured to move the work position;

a fastening part configured to be attachable and detachable to the maintenance lift;

a height sensor of the one or more sensors electrically connected to the work terminal, the height sensor configured to generate a height value by measuring a height of the work terminal and transmit the height value to the work terminal, the work terminal further configured to update the work progress information based on the height value and determine if the height value is a same height or higher than a set height limit value; and

a weight sensor of the one or more sensors electrically connected to the work terminal, the weight sensor configured to generate a weight value by detecting a weight and transmitting the weight value to the work terminal, the work terminal further configured to update the work progress information based on the weight value and determine if the weight value is a same weight or higher than a set weight limit value,

wherein the OCS is configured to

receive the repeater ID value, the work ID value, and the signal strength value from each of the plurality of repeaters,

detect a largest signal strength value among the plurality of repeaters and transmit the repeater ID value, the work ID value, and the signal strength value from one of the plurality of repeaters corresponding to the detected largest signal strength value, and

update an interlock setting of the interlock information to a turn-on state so each of the plurality of OHT is prevented from entering a region corresponding with the one of the plurality of repeaters corresponding to the detected largest signal strength value,

wherein the interlock information includes node information corresponding to each region of the plurality of rails, and

wherein the interlock setting indicates a driving state or a non-driving state for each region of the plurality of rails.

14 . The overhead hoist transport (OHT) management system of claim 13 , further comprising:

a pressure sensor of the one or more sensors coupled to the fastening part and configured to generate a pressure signal based on a pressure being applied to the pressure sensor during a fastening of the fastening part to the maintenance lift, the pressure signal configured to satisfy a generation condition of the work progress information based on the fastening part being attached to the maintenance lift, and the work progress information is configured to be generated at the work terminal based on the pressure signal being transmitted to the work terminal.

15 . The overhead hoist transport (OHT) management system of claim 13 , further comprising:

a detection sensor of the one or more sensors coupled to the fastening part, the detection sensor configured to generate a detection signal based on a portion of the maintenance lift being detected in a fastening region of the fastening part, and the detection sensor configured to transmit the detection signal to the work terminal,

wherein the work terminal is configured to generate the work progress information based on the detection signal being received by the work terminal.