Microcontroller Based Tongue Drive System for Physically Challenged People

Research areas:

• Volume 2,Issue 2, Sept. 2013

Year:

2013

Type of Publication:

Article

Keywords:

Hall Effect Sensor, Microcontroller, Monostable Multivibrator, Powered Wheel Chair, Tongue Drive System

Authors:

Mr. Preetham S.; Dr. P. A. Vijaya

Journal:

IJAIM

Volume:

2

Number:

2

Pages:

23-30

Month:

September

Abstract:

Tongue Drive system is a tongue-operated unobtrusive wireless assistive technology, which can potentially provide people with severe disabilities with effective computer access and environment control. It translates users intentions into control commands by detecting and classifying their voluntary tongue motion utilizing a small permanent magnet, secured on the tongue, and an array of magnetic sensors mounted on a headset outside the mouth or an orthodontic brace inside. In this paper, a customized interface circuitry is designed and implemented for Tongue Drive System. Also four control strategies are developed to drive a Powered Wheel Chair using H-Bridge, using relays to control both the directions of the DC motor. The designed system has been tested and is found to be working satisfactorily. The results show that all persons could easily operate the Powered Wheel Chair using their tongue movements and different control strategies worked better depending on the user familiarity with the Tongue Drive System. The user is facilitated with visual interface to know where the patient is travelling on the LCD screen using the ATMEL 89C51 Microcontroller.

Full text: IJAIM_149_Final.pdf