Students from Purdue University describe their team’s Darwin-OP robotics project at an ICRA 2012 challenge, explaining its sensor-based reactions and demonstrating them.
The team built an application intended to make the Darwin-OP more practical and personable. It reacts to motion and speech, temperature, and light or darkness. The team planned to add ledge and pickup detection.
The program runs an infinite loop that checks sensors every half second, while temperature and brightness are sampled every 10 seconds. The team used ActionScript so users could customize reactions by replacing an ASC file with a script of the same expected name. Pressure sensors were intended to be checked continuously once working.
A USB TEMPerHUM thermometer provides temperature readings. The program runs its driver separately and passes the output back to the sensory action program. For brightness, the Darwin-OP camera estimates the average HSL value for V and compares it with a threshold for bright or dark conditions.
The team purchased feet with four pressure sensors on each foot, arranged at the front and back, to detect when the robot reaches a ledge. The sensors were not working during the demonstration, so the team played the planned ledge and pickup reactions, then showed live camera and thermometer responses. The presenters noted that temperature reactions can be delayed by the 10-second sampling interval and that simultaneous reactions run one after another.
Briefs summarise talks and interviews; timestamps open the video at that moment. Claims in a talk are the speaker's own.
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