DOOR OPENING DETECTION DEVICE AND DOOR OPENING RECOGNITION SYSTEM

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DOOR OPENING DETECTION DEVICE AND DOOR OPENING RECOGNITION SYSTEM

This abstract first appeared for US patent application 18722423 titled 'DOOR OPENING DETECTION DEVICE AND DOOR OPENING RECOGNITION SYSTEM

Original Abstract Submitted

A door opening detection device and a door opening recognition system are disclosed. The door opening recognition system comprises the door opening detection device and a robot. The door opening detection device is mounted to an inside door handle, and the robot comprises a communication module and performs a predetermined operation in an internal space located inside a door in a state where the door is closed. The door opening detection device is operated in a state where, when the door is closed, a door sensing unit connected to one end of a string is located inside the door and a tag connected to the other end of the string and connected to the door sensing unit is fixed to be located outside the door. As the other end of the string and the tag are pulled in the opposite direction to the direction of gravity through a door gap when the door is opened, the door opening detection device detects that the door sensing unit has been moved in the direction of gravity, and generates a detection signal corresponding thereto. Then, the robot receives the detection signal from the door opening detection device through the communication module, and recognizes the opening of the door and stops the operation on the basis of the received detection signal.