Wang RH, Mihailidis A, Dutta T, Fernie GR. Usability testing of multimodal feedback interface and simulated collision-avoidance power wheelchair for long-term-care home residents with cognitive impairments. J Rehabil Res Dev.

1
Figure 4. Inside joystick interface showing
haptic feedback mechanisms. When movement of
power wheelchair stopped, directions of joystick
movement (and power wheelchair movement) toward
location of obstacle was blocked. (a) Eight
radio-controlled servomotors mounted around base
of joystick produced haptic feedback. (b) When
activated, servomotor rotated a small plate that
in turn moved a bar toward joystick. Joystick was
attached to a plate that interfaced with bars.
When a bar moved toward joystick, user could not
move joystick in that direction, preventing
movement of wheelchair in same direction.
Wang RH, Mihailidis A, Dutta T, Fernie GR.
Usability testing of multimodal feedback
interface and simulated collision-avoidance power
wheelchair for long-term-care home residents with
cognitive impairments. J Rehabil Res Dev.
201148(7)801-22.DOI10.1682/JRRD.2010.08.0147R
esearcherID Rosalie H. Wang, PhD, BSc (OT)
D-3743-2011