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Talks and Poster Presentations (with Proceedings-Entry):

L. Mehnen, E. Kaniusas, H. Pfützner:
"Magnetic sensor for monitoring of physiological functions";
Talk: IMEKO 2000 World Congress, Vienna; 2000-09-25 - 2000-09-28; in: "IMEKO Proceedings", ÖGMA Austrian Society for Measurement and Automation, (2000), ISBN: 3-901888-06-3; 183 - 186.



English abstract:
The present work investigates the application of magnetostrictive amorphous ribbons (AR, thickness dAR = 30 µm) for the detection of mechanical bending. Such ribbons exhibit high bending sensivity if used as a bimetal where the second component is a nonmagnetic carrier ribbon (CR) of thickness dCR. The aim of this study was to develop a bimetal ribbon which is fixed to the skin of the human body and should adjust itself to dynamic changes of the skin curvature. A main problem results from the demand of good flexibility - favoured by low dCR - as well as high sensitivity - favoured by high dCR. As a second problem, the agglutination layer shows a tendency to act as a third component. However reducing the thickness of this layer to a minimum, sensitivity values sufficiently high to detect physiological functions during sleep or anaesthesia were attained. For this application, the bimetal was fixed on the neck skin in the region of the carotid artery. This position proves to offer a signal of "mixed" character. Through mathematical separation, it yields physiological data like heart rate and respiration rate, and further diagnostically relevant events like motions, swallowing actions or snoring.

Created from the Publication Database of the Vienna University of Technology.