| abstract |
The present invention discloses an autonomous lawn mower (100) comprising a lawnmower body (102) having at least one motor (210) arranged to drive a cutting blade (212b) and via wheels The device advances the lawnmower body (102) onto the operating surface. The lawnmower body (102) includes a navigation system (204) arranged to assist the controller (202) in controlling operation of the lawnmower body (102) within a predetermined operating area (208). The navigation system includes a ranging module (106, 220), a rotatable optical survey module (222), a sonic obstacle detection module (224), a heat sink disposed on the outer surface of the lawnmower body (102) A unit for directing heat generated within the lawnmower body to the atmosphere, and a removable docking module (816) arranged to receive the lawnmower body (102). |