Biological body state estimation device and computer program
First 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.
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Accused Products
Abstract
A device to detect a state of a human being is provided. The device determines a time-series waveform of a frequency from a time-series waveform of a biological signal acquired from an upper body of a human being, and determines time-series waveforms of a frequency slope and frequency variation to analyze these frequencies. Upon analyzing the frequencies, it determines power spectrums of frequencies corresponding to a preset functional adjustment signal, fatigue reception signal, and activity adjustment signal, and then determines a state of the human being from a time-series change in each power spectrum. Dominant degrees of the functional adjustment signal and activity adjustment signal are compared as distribution rates thereof, in addition to a degree of progress of fatigue, to determine a state of the human being, for example a relaxed state, fatigued state, prominent state of sympathetic nervous, prominent state of parasympathetic nervous.
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Citations
12 Claims
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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:
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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. - View Dependent Claims (2, 3, 4, 5, 6)
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7. A non-transitory computer readable medium to be set in 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, causing a computer to perform a process comprising:
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determining a time-series waveform of a frequency from a time-series waveform of a biological signal acquired by a biological signal measuring mechanism; subjecting the time-series waveform of the frequency of the biological signal to movement calculation for determining a slope of the frequency at each predetermined time window set with a predetermined overlap time, and outputting a time-series change in the slope of the frequency acquired at each time window as a frequency slope time-series waveform; analyzing a frequency of the frequency slope time-series waveform, and determining a time-series change in a power spectrum; extracting 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 calculating proportions of the three frequency components in time sequence when a sum of power spectrums of the three frequency components is set to 100, and determining the proportions as distribution rate waveforms; and locating a waveform change pattern of the three frequency components in the distribution rate waveforms, and determining 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. - View Dependent Claims (8, 9, 10, 11, 12)
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Specification