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E. Kaniusas, L. Mehnen, J. Kosel, H. Pfützner, L Zakarevicius, A Alonderis, G Varoneckas, T Meydan, M Vazquez, M. Rohn, A.M. Merlo, B Marquardt:
"Working point optimisation of magnetoelastic bending sensor during long term monitoring";
Talk: International Conference on Biomedical Engineering, Kaunas, Lithuania; 10-28-2004 - 10-29-2004; in: "Proc. of VIII Intern. Conference on Biomedical Engineering, Kaunas, Lithuania", (2004), 56 - 61.

The present paper describes the working point optimisation of a magnetoelastic bending sensor. The extreme flatness and high sensitivity of the sensor favours its application on the skin for long-term monitoring of different physiologic parameters, e.g. cardiorespiratory activity on the neck or eye movements below the eye. However, the sensitivity is strongly influenced by the prevailing earth magnetic field. Thus periodic adjustment of the working point is necessary because the field direction within the sensor changes due to inevitable patient movements during long-term monitoring. A calibration procedure using short pulses was elaborated which does not disturb continuous monitoring and does not require any additional hardware.

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