Arm Paths (Kinect, Goniometer, optiTrack)

Eight participants, sat on a stable chair with no arm rests and a high backrest, with his/her right arm strapped to the passive manipulator. The participant’s motion was simultaneously recorded using a Kinect sensor, an electronic goniometer (Biopac Systems, USA), and a passive marker motion capture system, V120:Trio (OptiTrack, USA). The Kinect sensor was placed 2 m in front and slightly above the participant. The goniometer was attached, using double-sided tape, to the participant’s arm above the elbow. Three reflective markers were used for the V120:Trio recording. The markers were attached to bony landmarks on the right arm, i.e., acromion, lateral epicondyle, and wrist styloid process. The data from the Kinect sensor and the goniometer were simultaneously recorded on a single computer. The data from the V120:Trio sensor was recorded in parallel on a second computer. The sampling rates were 40 Hz for the Kinect, 100 Hz for the goniometer, and 120 Hz for the V120:Trio.