An autonomous robot janitor built by Subaru (Fuji Heavy Industries) and Sumitomo has landed a job cleaning the outdoor hallways of a new 14-story Bali-themed luxury apartment complex in Tokyo. Lovingly nicknamed 'Tondon' in an apparent reference to a legendary Balinese snake god, the robot is a close relative of RFS1, the autonomous floor cleaning robot that received Japan's 2006 Robot of the Year Award last December.

Like the RFS1, which currently cleans hallway floors inside ten Tokyo-area office buildings, Tondon works unsupervised and relies on an optical communication system to control the building's elevators, allowing it to move freely from floor to floor as needed. To improve the robot's ability to clean gritty outdoor surfaces, Tondon's makers have added a set of heavy-duty brushes designed to sweep up leaves and dirt from hallway floors and drains. Furthermore, Tondon's outer shell has been strengthened and waterproofed to protect its internal components from the elements, and it has been painted with a unique design to complement the apartment building's Bali-themed decor.

Tondon also has a number of safety features that help it better coexist with the building's residents, including proximity sensors that help prevent collisions with people, as well as bumper switches that stop the robot in its tracks when it is touched. A protective guard around the brushes prevents the robot from giving people unwanted shoeshines, while lamps and voice announcements provide ample warning when it is approaching.

A set of video cameras has also been added to the robot. With four cameras that record the robot's every move and a hard disk that stores the video feed, human overlords can keep close tabs on Tondon to make sure it doesn't nap on the job. The cameras can also be used for hallway surveillance, the company says, allowing the robot to double as a watchful security guard as it cleans.

[Source: Fuji press release]