![]() It too is a rotary encoder the caster's wheel is half black and half white, and optical sensors detect the change in color as it rotates. An undriven swivel caster (located at the front of most models, and at the back of the D-shaped S series) is used not for steering, as is often believed, but as an additional sensor. Rotary encoders on the wheels can detect the rate at which the wheels are spinning so it can determine if they're slipping or stuck, and drop sensors detect if a wheel is too low (such as getting stuck in a vent). Roombas are driven by two independently-operating side wheels, which can drive the Roomba forwards and backwards as well as perform turns of any radius, including 360° turns in place. It initially confines the vacuum to one area to be cleaned then, once the vacuum reports the area has been sufficiently cleaned (based on its estimated area), it directs it to proceed to the next space to be cleaned, and contains it there. Some 500-, 700- and 800-series models are compatible with the Virtual Wall Lighthouse. Third-generation and newer models are compatible with the Dual Mode Virtual Wall, which, in addition to simulating a straight wall, can create a circular barrier roughly 4 feet (1.2 m) in diameter. It projects a pattern of infrared light, which the vacuum detects and treats as a physical wall, prompting it to stop and turn around. įirst- and second-generation Roombas were not compatible with the Virtual Wall, an accessory used to prevent them from entering an area. Most models also have a recessed handle on top. ![]() A large contact-sensing mechanical bumper is mounted on the front half of all models, with an omnidirectional infrared sensor at its top front center. The S9 and S9+ robots are D-shaped rather than circular, with the flat part of the D at the front, and are narrower at 311 millimetres (12.2 in) wide. Most Roomba models are of a disk shape, measuring 338–353 millimetres (13.3–13.9 in) in diameter and 86–94 millimetres (3.4–3.7 in) high depending on the mode. Additionally, some units can be adapted to perform more creative tasks using an embedded computer in conjunction with the Roomba Open Interface.ĭesign 700 series model upside down, showing the two driving wheels, beater brushes, various sensors and other parts Parts of some models are interchangeable, allowing owners to mix and match features, or switch to other units for longer battery operation. Roombas allow some customizability and reprogramming. Newer high-end models also have a camera, which works in conjunction with onboard mapping and navigation software to systematically cover all floor area, move from room to room, avoid obstacles such as pet waste and charging cables, and find recharging bases and beacons. Various models have different features, including tangle-free brushes, separate sweep canisters, more powerful vacuums, obstacle avoidance, and performance maps displayed via smartphone apps. These sensors can detect the presence of obstacles, particularly dirty spots on the floor, and steep drops (e.g., to avoid falling down stairs).Īs of 2022, iRobot markets models of their 600, i, j, Combo and s9 series, while continuing to provide support and sell accessories for their previous series. Introduced in September 2002, they have a set of sensors that enable them to navigate the floor area of a home. Roomba is a series of autonomous robotic vacuum cleaners made by the company iRobot.
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