OBJECTIVE   The purpose of this project is to transform a power wheelchair into a   

    Voice-Activated Wheelchair.

ABSTRACT Statistics 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 $2,200,000.


Elvia Martin del Campo- VE-IC Developer
    This individual programmed and trained the artificial-neural network for voice pattern recognition. The software was written in C for compatibility purposes.
Brenda Prieto-Software Developer:

      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.

Luis Posada-Overrides Developer:

        This individual designed the electrical circuitry for the manual overrides such as the stepper motor driver circuit, speed system, and the manual switches.

Eyeri Comas-Security Developer:

        This individual developed the security features needed to ensure the safety of the person utilizing the voice-activated wheelchair.

     Interface Development:

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. 

Project Status:

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     Ralph Loya

                       Mr. Antonio Woo       Rex Velasquez      Sergio Velazquez