| 摘要 |
An autonomous vacuum cleaner has a plurality of sensors for detecting obstacles in the vicinity of the vehicle, characterised in that at least one sensor (212) is located on the vehicle and directioned so as to detect the presence of obstacles located to one side of the vehicle at or near an uppermost extremity of the vehicle. The sensor (212) is ultrasonic and is provided to enable the cleaner to follow the line of an object, eg a sofa, which is too low for the cleaner to pass freely beneath. The cleaner also comprises a brush bar which protrudes on one side of the cleaner, one of the sensors being arranged to detect obstacles located on this side of the cleaner.
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