Patent ID: 9622708
Date: 2017-04-18
CPC Classifications: A61B

Claim:
1. A biological body state estimation device which acquires a biological signal from an upper body of a human being and estimates a state of a human being by using the biological signal, comprising: circuitry configured to: calculate frequency to determine a time-series waveform of a frequency from a time-series waveform of a biological signal acquired by a biological signal measuring mechanism; calculate frequency slope time-series analysis to subject the time-series waveform of the frequency of the biological signal to movement calculation to determine a slope of the frequency at each predetermined time window set with a predetermined overlap time, and to output a time-series change in the slope of the frequency acquired at each time window as a frequency slope time-series waveform; calculate spectrum time-series change to analyze a frequency of the frequency slope time-series waveform, and to determine a time-series change in a power spectrum; calculate distribution rate waveform to extract frequency components corresponding to a preset functional adjustment signal, fatigue reception signal and activity adjustment signal from the time-series change in the power spectrum, for to calculate proportions of three frequency components in time sequence when a sum of power spectrums of the three frequency components is set to 100, and to determine the proportions as distribution rate waveforms; and locate a waveform change pattern of the three frequency components in the distribution rate waveforms, and determine a state of a human being by comparing the located waveform change pattern with correlative data between a waveform change pattern and a state of a human being which the correlative data is stored in a storage unit in advance.