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Figure 2 | BioMedical Engineering OnLine

Figure 2

From: Extraction of user's navigation commands from upper body force interaction in walker assisted gait

Figure 2

Typical raw force data obtained from the Y-axis of the 3D sensor. Two main zones highlighted: (i) the yellow zone indicates the moments in which the subject has his arms resting on the structure of the walker and is not walking, and (ii) denotes the moments in which the subject is actually walking with the device. Three main components are identified in force signals: the vibrations introduced by floor/walker wheels imperfections, oscillations due to user's trunk motion during gait and the voluntary transient events related to the user's navigational commands.

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