Overhead buffer double-entry detection system and method thereof

An overhead buffer double-entry detection system, comprising:

• an overhead hoist transport;
• a first sensing unit, for scanning and generating detection data of a horizontal range;
• a driving device, disposed on the overhead hoist transport, and connected to the first sensing unit, for moving the first sensing unit in a vertical range;
• a controlling unit, connected to the driving device and the first sensing unit respectively;
• and
• an overhead hoist transport controlling system, connected to the overhead hoist transport and the controlling unit respectively, for sending a detection instruction and a driving instruction to the controlling unit when the overhead hoist transport moves to a corresponding overhead buffer position, whereby the controlling unit bases on the driving instruction to control the driving device to move the first sensing unit in a vertical range, bases on the detection instruction to control the first sensing unit to scan and generate detection data of each horizontal range within the overhead buffer during movement process, and sends the detection data of each horizontal range within the overhead buffer to the overhead hoist transport controlling system, and the overhead hoist transport controlling system bases on the detection data of each horizontal range within the overhead buffer to judge whether there is obstacle in the overhead buffer.