347 局部変動圧力を与えた生体時系列信号の分析(感性情報,OS-21 感性計測と設計)

概要

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Results of biological signal analysis of human body subjected to local dynamic pressure is presented. Different excitation frequency of sinusoidal pressure is applied to the loins, in reclined position on the bed. Electrical signals on the skin are then measured. An electrocardiogram (ECG) is detected from a chest of the body, while electromyogram (EMG) is from the muscles of both arms. Based on time-series of both ECG and EMG, the signals were then analyzed by power spectra and by calculation of their maximum Lyapunov exponents. It is found that human muscles show influence when sinusoidal pressure that is quicker than heartbeat's frequency applied to the body. For EMG in rest condition after sinusoidal pressure's excitation, Maximum Lyapunov exponents is increased, compare to the rest condition before excitation. The opposite result is obtained for ECG, Results for chaotic excitation are also presented.
一般社団法人日本機械学会の論文
2004-09-27