Robot lawn mower

A Queensland University of Technology PhD researcher has developed a prototype of an inexpensive robotic lawnmower that uses a web cam to guide itself around a backgarden.

Information Technology researcher Henry Huang said existing automatic lawnmowers were expensive and required a guide-wire to be installed around the perimeter of a garden, either above or below ground.

'My system uses an onboard web cam connected to a computer to detect landmarks placed on the lawn and guides the mower between them,' Mr Huang said. To study the effectiveness of his system, Huang used traffic cones as landmarks because their colour contrasted well against the green background of the lawn.

Huang said the average lawn required four to five landmarks, while complicated boundaries might need more. The landmarks can be easily relocated to define new working areas.

'Existing automatic lawnmower kits cost about $2000 including perimeter wires, but my system would be about half that price because the cameras are inexpensive and the landmarks would be much cheaper to produce than the perimeter wires.'