UID: 20200332

Name: Kim chan hyeong

I keep the promises between Prof. and I

Homework 2 How does a robot vacuum go back to a charger?

When the robot vacuum returns to the charger, it returns to the charger via an infrared sensor based on mapping.

Mapping is a technology that serves as the eyes and ears of a robot vacuum and maps the area where the robot cleaner can clean and the area that cannot be cleaned due to obstruction, barriers, and walls on the map to create a map of the area that can be cleaned. The key to mapping is to create a digital floor plan of the house, which works with a variety of technologies, including LiDAR, cameras, and sensors. LiDAR is a technology that uses near-infrared light, visible light, and ultraviolet light to illuminate objects, detect the reflected light through an optical sensor, and measure the distance between vacuum cleaners and objects, map them, and the camera recognizes objects so that the robot vacuum can move in a better direction. Infrared sensors help robot vacuum find infrared signals on the charger and move to the charger if they have finished cleaning or are running low on batteries.

Therefore, the robot vacuum can follow the infrared signal to return to the charger, avoiding obstacles based on sensors and maps it has created, rather than going back the way it came.