Diseño e implementación del sistema de movimiento direccional de una silla de ruedas para ser controlada por reconocimiento de un patrón de voz mediante electrónica de potencia y motores Dc como actuadores

Abstract

Automatic wheelchairs have the objective of provide assistance to people with physical disabilities, improving their lifestyle and, providing to these people the opportunity to be included in the society. This wheelchair was developed with a voice recognition module as the core of the control system, through which the wheelchair operator can drive it, with voice instructions, ensuring an adequate address and rotational direction according to their needs of mobility. The most important element of the speech recognition stage is the HM2007 integrated circuit, which is part of the recognition module SR -07.Data processing and management of the signals for operation is performed with the microcontroller AVR ATMEGA164P produced by Atmel. A lead-acid battery (60Ah) is responsible for providing the energy needed for the entire system that is for both the elements of the power stage as well as the elements of the control stage. The chair movement is provided by two DC motors adapted to reducing boxes and installed by a mechanical clamp that offers the necessary stability without inconvenience to the user's weight plus the weight of the engine, battery and mechanical parts. The importance of this project is the intervention for a vulnerable sector of society, encouraging research and promoting development projects towards links with the community.