It uses ultrasonics to detect furniture, walls, toys and other obstacles. "The acoustic sonar vibrates at a rate of 60,000 hertz and is coated with a thin gold plate to give the best performance," says Lars Dahl, technical project manager. "The sonar’s semicircular shape allows it to see up to 180 degrees." However, the Trilobite cannot negotiate steps and needs a magnetic strip hidden beneath carpet to stop it from tumbling down stairs.
Dirt is collected in a dust box; no dust bags are needed. Two wheels equipped with independent suspension are powered by individual motors. A patented system in the roller brush allows the vacuum to pass over rugs and avoid getting tangled up with electrical cords and other objects on the floor.