Abstract
This paper presents the design and development of a prototype of a reconfigurable wheelchair for rehabilitation and self-assistance to fit the size of a seven years old child (average 35 kg weight). Though the developed prototype is developed at this stage to fit a child, it can be resized, after considering variations in weight and size, to fit an older adult. The developed prototype has a mechanism that enables the user to transform from sit-to-stand (STS) posture and vice versa. With the help of the developed wheelchair, the user will also be able to adjust the posture of his upper body using an adjustable back support using two linear actuators. This configuration will allow the user to use the wheelchair as a mobility device as well as for rehabilitation purposes without the need of external support. The availability of STS and back adjustment mechanisms will allow the user to do regular exercising which will enhance blood circulation as sitting for long periods inflates lower limbs disability. The proposed configuration will help in enhancing the functional capabilities of end-users allowing for increased independence and ultimately quality of life.
Highlights
Assistive technology for mobility includes wheelchairs, exoskeletons, walking devices, lifting aids and other devices (Dubowsky et al, 2000; Kaneshige, Nihei, & Fujie, 2006)
International Standards Organization (ISO) wheelchair transportation standards regarding the use of wheelchairs for seating during transportation on buses or vans have been developed by Hobson (2001), American National Standards Institute (ANSI)/Rehabilitation Engineering & Assistive Technology Association of North America (RESNA) (2000) and ISO/DIS (2000)
Conclusion and future work In order to design the wheelchair with a STS facility; number of design options have been proposed and investigated in terms of stability, energy consumption and the occupied workspace
Summary
Assistive technology for mobility includes wheelchairs, exoskeletons, walking devices, lifting aids and other devices (Dubowsky et al, 2000; Kaneshige, Nihei, & Fujie, 2006). In most cases; the patient eventually requires assistance to use the device This may include someone to push a wheelchair, to help in lifting from the bed, to support using the toilet or to provide guidance through cluttered areas. The International Standards Organization (ISO) for wheelchair standards consists of standardized tests simulating three to five years of typical wheelchair use Those voluntary test standards can be used to determine the fatigue life, static tipping angles, braking distances, energy consumption, obstacle-climbing ability, and environmental and electromagnetic compatibility of the wheelchair. ISO wheelchair transportation standards regarding the use of wheelchairs for seating during transportation on buses or vans have been developed by Hobson (2001), American National Standards Institute (ANSI)/Rehabilitation Engineering & Assistive Technology Association of North America (RESNA) (2000) and ISO/DIS (2000)
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