The iRobot Roomba, like other advanced robotic vacuum cleaners, uses a combination of sensors, software algorithms, and predefined cleaning patterns to determine when its cleaning work is done. Here's how it typically works:
Room Mapping and Navigation: The Roomba starts by moving around the cleaning area, using sensors like infrared sensors, cameras, and cliff sensors to map the room's layout and detect obstacles, walls, and drop-offs (stairs).
Cleaning Patterns: Roomba follows predefined cleaning patterns that allow it to cover the entire cleaning area efficiently. These patterns include spirals, back-and-forth, and edge cleaning, among others. The sensors help the Roomba adjust its cleaning path and avoid getting stuck or missing spots.
Dirt Detection: The Roomba is equipped with dirt sensors that can detect areas with higher concentrations of dirt, dust, or debris. When the robot identifies such areas, it may spend more time cleaning or adjust its cleaning pattern to ensure a more thorough job.
Time and Battery Management: The Roomba is programmed to clean for a certain amount of time or until its battery reaches a low level. When the set time has elapsed, or the battery is nearly depleted, the Roomba will conclude its cleaning session.
Return to Base: Once the cleaning session is completed or the battery is critically low, the Roomba automatically returns to its charging dock to recharge itself. Some models may also notify the user through a smartphone app or display on the robot when the cleaning is done or if there were any issues.
Cleaning Feedback: Modern Roomba models may provide cleaning reports or statistics through the associated smartphone app. This feedback can include information about the total area cleaned, the duration of the cleaning session, and any potential obstacles or errors encountered during cleaning.
It's worth noting that the exact capabilities and features can vary depending on the specific model of Roomba, as iRobot regularly updates and improves its robotic vacuum technology. Generally, Roombas are designed to continue cleaning until the cleaning session is complete or their battery charge is depleted, providing an efficient and autonomous cleaning experience for users.