Magneto-Elastic Bilayers for Sleep Apnea Monitoring
Magneto-elastic bilayers (BLs), consisting of a magnetostrictive layer and a non-magnetic counter layer, show highest sensitivity with respect to bending. This paper describes a biomedical application in the field of sleep apnea screening. A multi-parametric detector fixed at the thorax contains two BLs. One BL yields a skin curvature sensor adjusting itself to curvature variations given by physiological activities. The second BL exhibits a free end thus working as a motion sensor. The two signals are fed into artificial neural networks for the detection of events like normal respiration and apneas, as well as body movements and position.
A.G. Mamalis, M. Enokizono and A. Kladas
S. Traxler et al., "Magneto-Elastic Bilayers for Sleep Apnea Monitoring", Materials Science Forum, Vol. 670, pp. 355-359, 2011