This is the Robotic Mobility Platform from Segway, best-known for its iconic two-wheeled Human Transporter. The Segway RMP, which uses the same components, features an electric motor that runs at 2 horsepower for sustained use and can peak at 4 to 5 horsepower. It can range up to 15 miles and carry a 400-pound payload. The RMP 400 here is outfitted with a spray nozzle for firefighting duty.
In the robot pictured here, infrared sensors (on the green rectangle at top right) swivel back and forth and communicate with a host computer to plot out a real-time route.
See also from this week: "Photos: The robot designs of iRobot"