Design of voice-controlled wheelchair for quadriplegic patients Online publication date: Thu, 13-Jul-2017
by N. Jeevitha; P.U. Ilavarasi
International Journal of Biomedical Engineering and Technology (IJBET), Vol. 24, No. 3, 2017
Abstract: Powered wheelchairs with standard joysticks are difficult to control for 'Quadriplegics' patients. Wheelchair movement based on speaker's voice command will be helpful for the physically challenged people to mobilise themselves. So in this work a set of ten male and female voice commands (FORWARD, BACKWARD, LEFT, RIGHT and STOP) were recorded at different instances using a microphone and analysed how patient's voice differs from others by considering the parameters of amplitude, frequency and phase in the MATLAB software. FFT technique is used for feature extraction and smoothing the patient's voice signal. The processed signal is stored as a reference signal in LabVIEW for interfacing with hardware. The powered wheelchair movement depends on motor control and a drive system which consists of PIC 16F877A microcontroller and DC motor. Once the voice recognisation system identifies the voice command uttered by the patient, it is coded into digital signal and transferred to the PIC microcontroller which then controls the wheelchair accordingly.
Existing subscribers:
Go to Inderscience Online Journals to access the Full Text of this article.
If you are not a subscriber and you just want to read the full contents of this article, buy online access here.Complimentary Subscribers, Editors or Members of the Editorial Board of the International Journal of Biomedical Engineering and Technology (IJBET):
Login with your Inderscience username and password:
Want to subscribe?
A subscription gives you complete access to all articles in the current issue, as well as to all articles in the previous three years (where applicable). See our Orders page to subscribe.
If you still need assistance, please email subs@inderscience.com
Our Blog 
Follow us on Twitter 
Visit us on Facebook