Abstract: A state change of a person is captured with timing closer to consciousness of the person. A frequency slope waveform of a time series signal of a pulse wave of a body of a person detected by an air pack is obtained by a frequency slope time-series analyzing and a computing device and a frequency fluctuation time-series waveform is obtained by a frequency fluctuation time-series analyzing and computing device. By comparing changes of two waveforms with each other in a waveform determining device, a state change of a person can be captured with timing closer to consciousness of the person.

Abstract: A biological signal with small amplitude is detected with greater sensitivity than before. A mechanical amplification device provided with a three-dimensional knitted material 10 and plate-shaped foam bodies 21 and 22 laminated in the periphery of the three-dimensional knitted material, preferably a mechanical amplification device provided with a film 16 disposed between the three-dimensional knitted material 10 and the plate-shaped foam bodies 21 and 22 is provided, and a vibration sensor 30 is attached to this mechanical amplification device. Micro vibration on the body surface caused by a human biological signal such as heart rate, respiration, atrial and aortic vibrations and the like is propagated to the plate-shaped foam bodies 21 and 22, the film 16, and the three-dimensional knitted material 10, and membrane vibration is generated in the plate-shaped foam bodies 21 and 22 and the film 16, while string vibration of a fiber is generated in the three-dimensional knitted material 10.

Abstract: A technology to grasp a state of a human being more accurately is provided. The technology is provided with means for acquiring a time-series waveform of a frequency from a time-series waveform of a biological signal sampled from the upper body of a human being and for further acquiring a time-series waveform of frequency slope and a time-series waveform of frequency fluctuation and for applying frequency analysis to them. In the frequency analysis, a power spectrum of each frequency corresponding to a functional adjustment signal, a fatigue reception signal, and an activity adjustment signal, respectively, determined in advance is acquired. Then, a state of a human being is determined from a time-series change of each power spectrum.

Abstract: A biological body state estimation device configured such that a homeostatic function level is sorted and acquired in plural stages by using a biological signal obtained from an upper body of a person and each stage of the homeostatic function level is plotted in time series in accordance with a time axis indicated on the lateral axis and displayed as a graph by a display. A highest part on the vertical axis of the graph can be displayed as a highly active state and a lowest part as a function decline state. Therefore, a state of fluctuation due to autonomous nerves as an attempt to maintain homeostasis, progress of a feeling of fatigue, and a state stimulated by activation of the brain can be captured as a periodic function. Moreover, a sleep prediction phenomenon can be captured.

Abstract: There are provided a bio-signal analyzer using a sensor capable of detecting, even though it is non-invasive, a more prominent bio-signal, and a seat using the bio-signal analyzer. Air cushions (10), which are sensors detecting a bio-signal in a non-invasive manner, are disposed at the positions corresponding respectively to left and right iliocostalis lumborum muscles of a person, in a substantially vertically long state along the iliocostalis lumborum muscles, with upper ends thereof being set at least at the height corresponding to a lower face of a human diaphragm. In the diaphragm, bio-signals such as heartbeats, breaths, or pulsations of aorta passing through the vicinity of the diaphragm are resonated and amplified. Further, the iliocostalis lumborum muscles are at positions where they are easily vibrated by pulsations of aorta passing through the vicinity of the lumbar region.

Abstract: Determination about presence/absence of alcohol in the body is made accurately. A frequency dynamic information processing means 610 which obtains a tendency of time-series fluctuation regarding a frequency of a pulse wave of a back portion of a person detected by an air pack and an alcohol-drinking determining means 650 which determines an alcohol-drinking state when a tendency of a time-series fluctuation regarding the frequency obtained by the frequency dynamic information processing means 610 is separated from a tendency of time-series fluctuation regarding the frequency at a non-drinking state are provided.

Abstract: A state change of a person is captured with timing closer to consciousness of the person. A frequency slope waveform of a time series signal of a pulse wave of a body of a person detected by an air pack is obtained by a frequency slope time-series analyzing and a computing device and a frequency fluctuation time-series waveform is obtained by a frequency fluctuation time-series analyzing and computing device. By comparing changes of two waveforms with each other in a waveform determining device, a state change of a person can be captured with timing closer to consciousness of the person. A sleep-onset point can be specified clearly based upon the case where a fluctuation waveform steep gradient portion indicating a steep gradient change emerges in the frequency fluctuation waveform, and amplitude and a base line position of the frequency fluctuation waveform or the frequency slope waveform are in predetermined ranges.

Abstract: A configuration is adopted where elastic members made of expanded rein beads and having a size covering air cushions are disposed between a skin member and the air cushions of a human body supporting device. By arranging a plurality of elastic members made of expanded rein beads and in a stacking manner, preferably, arranging two elastic members made of expanded resin beads, spring constants of the elastic members obtained from load-deflection characteristics when they are pressed to a deflection amount of 1 mm by a pressing plate with a diameter of 30 mm being higher than that of the air cushion and being different from each other, a biological signal can be transmitted to the air cushions without damping the biological signal, though the elastic members made of expanded rein beads and are provided.

Abstract: There are provided a bio-signal analyzer using a sensor capable of detecting, even though it is non-invasive, a more prominent bio-signal, and a seat using the bio-signal analyzer. Air cushions (10), which are sensors detecting a bio-signal in a non-invasive manner, are disposed at the positions corresponding respectively to left and right iliocostalis lumborum muscles of a person, in a substantially vertically long state along the iliocostalis lumborum muscles, with upper ends thereof being set at least at the height corresponding to a lower face of a human diaphragm. In the diaphragm, bio-signals such as heartbeats, breaths, or pulsations of aorta passing through the vicinity of the diaphragm are resonated and amplified. Further, the iliocostalis lumborum muscles are at positions where they are easily vibrated by pulsations of aorta passing through the vicinity of the lumbar region.