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IRBM
Volume 26, n° 4
pages 291-295 (septembre 2005)
Doi : 10.1016/j.rbmret.2005.05.001
Received : 17 Mars 2005 ;  accepted : 19 May 2005
Low cost general-purpose microcontroller based multi-channel neuromuscular stimulator
Un stimulateur neuromusculaire multi-canal multi-usage à faible coût
 

Boby Varghese, Kiran B. Gopal, Saly George, Paul K. Joseph
Electrical Engineering Department, National Institute of Technology, Calicut, India 

*Corresponding author. Tel.: +91 495 228 6303; fax: +91 495 228 7250.
Abstract

A constant current stimulator for high-impedance loads using a microcontroller is presented. The designed muscle stimulator has the advantage that all the parameters such as amplitude, duration and time period can be adjusted. It can give up to eight independent channels of output at a time with adjustable parameters. It has got the advantage of having a user-friendly interface. The facility for storing the stimulation parameters and making it available for future reference has made. A prototype produces stimulus of amplitude and pulsewidth within 0Iskin20 mA and 1 msTpulse250 ms, respectively. Pulse-repetition spans from 0.1-1000 Hz. Worst case ripple is less than 3% at Iskin=1 mA. Maximum power consumption is 6.5 W per channel at Iskin=20 mA.

The full text of this article is available in PDF format.
Résumé

Un stimulateur à courant constant, fondé sur un microcontrôleur a été conçu pour des charges d'impédances élevées. Le neuro stimulateur présente l'avantage de pouvoir ajuster que tous les paramètres d'amplitude, de période et de durée. Il peut gérer jusqu'à huit canaux indépendants avec des paramètres ajustés différemment. Il est interfacé à l'aide d'une interface utilisateur conviviale. Les paramètres de stimulation peuvent être facilement enregistrés et rester disponibles pour la stimulation suivante. Le prototype peut produire des stimuli d'amplitude et de largeur dans les gammes 0I20 mA et 1 msT250 ms, respectivement. Les temps de répétition sont dans l'intervalle [0.1 Hz; 1000 Hz]. La stabilité de la stimulation est meilleure que3% à 1 mA. La consommation maximum est de 6.5 W par canal à une amplitude de stimulation de 20 mA.

The full text of this article is available in PDF format.

Keywords : Current stimulator, Neuromuscular stimulator, Microcontrollers, Graphical user interface

Mots clés : Stimulateur de courant, Stimulateur neuro-musculaire, Micro-contrôleur, Interface graphique utilisateur




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