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Distributed electric stimulator


Markus Billeter, Michael Casty

Semester/Bachelor Thesis, SS 05

With Functional Electrical Stimulation (FES) the contraction of muscles can be controlled by applying current pulses among electrodes placed on the skin surface. This technique is useful for people who suffer from neurological disorders. Using not only two electrodes but an array allows to carry out complex movements e.g. of single Fingers.
The wiring effort of such a system is high and unsuitable for the usage on patients since every array electrode needs a separate cable in order to be individually controllable. Thus the idea of a distributed system has arisen which reduces the wiring drastically. The concept is that the electrodes are controlled by intelligent nodes connected to the same power line. Every node must be configured with a pulse shape, pulse length and an amplitude in every stimulation period. This information is modulated onto the 200V DC power supply line. The nodes, consisting of 4 electrodes each, must be intelligent enough to recollect the dedicated data from the line.
A prototype of such a system has been realized and the feasibility of a distributed system is shown. Details about data transmission, the hardware and software design and measurements are presented. Furthermore an outlook to continuative work is given.

Supervisors: M. Lawrence, Dr. T. Keller, Prof. M. Morari


Type of Publication:

(13)Semester/Bachelor Thesis

M. Morari

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% Autogenerated BibTeX entry
@PhdThesis { BilCas:2005:IFA_2792
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