The purpose of this
project is to transform a power wheelchair into a
demonstrate there are many people who are tetraplegic and most of them
are in their most productive phase of life. The life expectancy for
these individuals has been increasing in the last years due to the
innovations that allow them to stay healthy. On the other hand, the
resources to help them integrating back into society are very limited.
Less than 23% of people who are tetraplegic return to work because
their dependence to others and to a wheelchair is very high. The
existing alternative voice-controllers designed for the tetraplegic
are proven to be either very ineffective and/or unsafe. The goal of V-Tech is
to implement a voice activation system that will
allow the users to control a power wheelchair. Since the safety issue
is very important, V-Tech will also implement sensors, manual
overrides and a safety ON/OFF switch to enforce security. The total
cost of these implantations are not to exceed the quantity of $1000,
making it very affordable for the users, since it is known that the
costs of living for the tetraplegic ranges from $800,000 to
Elvia Martin del Campo-
This individual programmed and trained the artificial-neural network
for voice pattern recognition. The software was written in C for
This individual developed the software required for the interface of the
wheelchair as well for the control of other the security features. The
software was written in Dynamic C for compatibility purposes.
This individual designed the electrical
circuitry for the manual overrides such as the stepper motor driver
circuit, speed system, and the manual switches.
This individual developed the security features needed to ensure the
safety of the person utilizing the voice-activated wheelchair.
The team developed the electrical interface. The
PC Board where the micro-controller sends the outputs to the powered wheelchair’s electrical controller and the power
supply needed for the PC Boards designs.
A complementary PC Board where the overrides and the security features are
controlled was design also. The power required for the interface will be obtained from a secondary power supply
the batteries used for the powering of the wheelchair should be kept intact.
The project is 98% completed, some adjustments are still performed in order to
obtain the best results. The last stage of testing is 98% done; PC boards will be ready for final implementation.
Software is 99% completed due to minor editions of the electrical interface designs.
Thanks to Professors, T. As ,Staff and Sponsors:
Mr. Robert Rubio Thomas Krause
Mr. Antonio Woo Rex Velasquez