Abstract
Researchers at the University of Central Florida have developed a device
with a unique learning algorithm to maximize the propulsion efficiency of passive
prostheses used by individuals with transtibial (below-knee) amputations. The UCF
real-time adjustable energy-releasing device enables leg and ankle prostheses
to control stored energy and
release it at appropriate times
to propel the body forward.
The device attaches to existing passive prostheses or can be included in the production
of new prostheses.
A conventional passive prosthesis (such as one with a carbon
fiber foot) stores energy as
the user applies weight and then returns energy
as the body moves forward.
However, it cannot control the timing of the
energy release. As a result, the prosthesis may not release stored energy at optimal
times during the gait cycle.
Instead, it may release an upward
force, causing the user to use other muscles to
maintain a steady gait.
Technical Details
The following example setup of the invention includes a module and
steel wires attached to the prosthesis. In the module, a sensor communicates
with a microcontroller to determine appropriate times for releasing stored
energy and providing propulsion along the direction of travel. The user can manually
set the energy release timing or let the optimized algorithm set the timing. The
module also can be configured to detect the type of walking surface (such as
grass, pavement or incline/decline) to provide optimal energy release timing.
Partnering Opportunity
The research team is looking for partners to develop the
technology further for commercialization.
Benefit
Can be installed onto existing prostheses or integrated into new devicesCompatible with most types of passive ankle prosthesesReduces the time, effort and cost of getting a new prescription and buying a new prosthesisRequires low battery powerMarket Application
Prosthetics and orthotics
Brochure
