WAKEFUL-STATE DATA GENERATING APPARATUS AND WAKEFULNESS DEGREE DETERMINING APPARATUS
First Claim
1. A wakeful-state data generating apparatus comprising:
- at least one processor and at least one storage device,the at least one storage device configured to;
store a first correlation between value of variation in heartbeat interval and maximum spectral density, andstore a second correlation between heartbeat rate and wakeful-state maximum frequency,the at least one processor configured to;
calculate a value of variation in heartbeat interval from a heartbeat signal of a subject,estimate a wakeful-state maximum spectral density of the subject, on the basis of the first correlation and the calculated value of variation,calculate a heartbeat rate from the heartbeat signal,estimate a wakeful-state maximum frequency of the subject, on the basis of the second correlation and the calculated heartbeat rate, andgenerate wakeful-state data including the estimated wakeful-state maximum spectral density and the estimated wakeful-state maximum frequency.
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Abstract
A wakeful-state data generating apparatus includes at least one processor and at least one storage device, the at least one storage device configured to; store a first correlation between value of variation in heartbeat interval and maximum spectral density, and store a second correlation between heartbeat rate and wakeful-state maximum frequency, the at least one processor configured to; calculate a value of variation in heartbeat interval from a heartbeat signal of a subject, estimate a wakeful-state maximum spectral density of the subject, on the basis of the first correlation and the calculated value of variation, calculate a heartbeat rate from the heartbeat signal, estimate a wakeful-state maximum frequency of the subject, on the basis of the second correlation and the calculated heartbeat rate, and generate wakeful-state data including the estimated wakeful-state maximum spectral density and the estimated wakeful-state maximum frequency.
12 Citations
20 Claims
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1. A wakeful-state data generating apparatus comprising:
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at least one processor and at least one storage device, the at least one storage device configured to; store a first correlation between value of variation in heartbeat interval and maximum spectral density, and store a second correlation between heartbeat rate and wakeful-state maximum frequency, the at least one processor configured to; calculate a value of variation in heartbeat interval from a heartbeat signal of a subject, estimate a wakeful-state maximum spectral density of the subject, on the basis of the first correlation and the calculated value of variation, calculate a heartbeat rate from the heartbeat signal, estimate a wakeful-state maximum frequency of the subject, on the basis of the second correlation and the calculated heartbeat rate, and generate wakeful-state data including the estimated wakeful-state maximum spectral density and the estimated wakeful-state maximum frequency. - View Dependent Claims (2, 3, 4)
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5. A wakeful-state data generating apparatus comprising:
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a first calculating unit that calculates a value of variation in heartbeat interval from a heartbeat signal of a subject; a first estimating unit that estimates a wakeful-state maximum spectral density of the subject from the value of variation calculated by the first calculating unit, on the basis of a pre-recorded correlation between value of variation and wakeful-state maximum spectral density; a second calculating unit that calculates a heartbeat rate from the heartbeat signal; a second estimating unit that estimates a wakeful-state maximum frequency of the subject from the heartbeat rate calculated by the second calculating unit, on the basis of a pre-recorded correlation between heartbeat rate and wakeful-state maximum frequency; and a generating unit that generates wakeful-state data including the wakeful-state maximum spectral density estimated by the first estimating unit, and the wakeful-state maximum frequency estimated by the second estimating unit. - View Dependent Claims (6, 7, 8)
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9. A wakefulness degree determining apparatus comprising:
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at least one processor and at least one storage device, the at least one storage device configured to; store a first correlation between value of variation in heartbeat interval and maximum spectral density, store a second correlation between heartbeat rate and wakeful-state maximum frequency, store a third correlation between wakeful-state maximum spectral density and non-wakeful-state maximum spectral density, and store a fourth correlation between wakeful-state maximum frequency and non-wakeful-state maximum frequency, and the at least one processor configured to; calculate a value of variation in heartbeat interval from a heartbeat signal of a subject, estimate a wakeful-state maximum spectral density of the subject, on the basis of the first correlation and the calculated value of variation, calculate a heartbeat rate from the heartbeat signal, estimate a wakeful-state maximum frequency of the subject, on the basis of the second correlation and the calculated heartbeat rate, generate wakeful-state data including the wakeful-state maximum spectral density and the wakeful-state maximum frequency, estimate a non-wakeful-state maximum spectral density of the subject from the estimated wakeful-state maximum spectral density, on the basis of the third correlation, estimate a non-wakeful-state maximum frequency of the subject from the estimated wakeful-state maximum frequency, on the basis of the fourth correlation, generate non-wakeful-state data including the non-wakeful-state maximum spectral density and the non-wakeful-state maximum frequency, and generate an index of wakefulness degree related to determination of a degree of wakefulness, by using the wakeful-state data and the non-wakeful-state data. - View Dependent Claims (10, 11, 12, 13, 14)
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15. A wakefulness degree determining apparatus comprising:
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a first calculating unit that calculates a value of variation in heartbeat interval from a heartbeat signal of a subject; a first estimating unit that estimates a wakeful-state maximum spectral density of the subject from the value of variation calculated by the first calculating unit, on the basis of a pre-recorded correlation between value of variation and wakeful-state maximum spectral density; a second calculating unit that calculates a heartbeat rate from the heartbeat signal; a second estimating unit that estimates a wakeful-state maximum frequency of the subject from the heartbeat rate calculated by the second calculating unit, on the basis of a pre-recorded correlation between heartbeat rate and wakeful-state maximum frequency; a first generating unit that generates wakeful-state data including the wakeful-state maximum spectral density estimated by the first estimating unit, and the wakeful-state maximum frequency estimated by the second estimating unit; a third estimating unit that estimates a non-wakeful-state maximum spectral density of the subject from the wakeful-state maximum spectral density estimated by the first estimating unit, on the basis of a pre-recorded correlation between wakeful-state maximum spectral density and non-wakeful-state maximum spectral density; a fourth estimating unit that estimates a non-wakeful-state maximum frequency of the subject from the wakeful-state maximum frequency estimated by the second estimating unit, on the basis of a pre-recorded correlation between wakeful-state maximum frequency and non-wakeful-state maximum frequency; a second generating unit that generates non-wakeful-state data including the non-wakeful-state maximum spectral density estimated by the third estimating unit, and the non-wakeful-state maximum frequency estimated by the fourth estimating unit; and a scale generating unit that generates an index of wakefulness degree, by using the wakeful-state data generated by the first generating unit and the non-wakeful-state data generated by the second generating unit. - View Dependent Claims (16, 17, 18, 19, 20)
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Specification