I am presenting on this page the second version of a robot carrying laptop computers and powered by Lego Mindstorms NXT.
For some background introduction, see the first version of the mobile robot.
The idea is again to have a mobile robot powered by Lego Mindstorms NXT robot and carrying a laptop computer.
The general idea was to reduce the time needed to build a mobile robot prototype, easily reproducible, while having a cheap and robust platform to experiment some human-computer and human-robot interaction.
This time, the chassis is hand-made, while the rest is in Lego.
2008-11-18: The version presented is equiped with double motors (1 brick and 2 motors per wheel), but this is not necessary if there is not too much load to carry.
The mobile robot carrying the max load of 10 Kg:
“Mobile laptop computer 2” driving around:
The robot alone weights 1.9 Kg in its double version (2 bricks, 4 motors), and it is able to carry up to 10 Kg. With a medium load, its speed is about 0.5 m/s (1.8 km/h).
The chassis has costed ~27€, and in addition of the Lego NXT parts (brick, motors) which cost 180€ (times 2 for double motors), there was for ~30€ of other Lego (wheels, long axes, etc.), for a total of ~300€ (or 540€ for the version with double motors).
This robotic platform has been used to experiment gaze interaction control; that is to say to pilot hands-free with the eyes only. The robot goes to the area where the pilot looks on the screen equipped with an eye-tracker:
Read more on the gaze-interface to control this robot on Martin Tall’s blog,
from the IT University of Copenhagen.
Gaze control interface tested with the mouse:
This prototype was shown on the news of Danish national television (DR1) on 2008-11-21 from 21:21 to 21:23. The robot even succeeded in carrying the television camera!
Interview on DR1: