METHOD FOR DETERMINING A PERSON'S SLEEPING PHASE WHICH IS FAVOURABLE FOR WAKING UP
First Claim
1. A method for determining a human sleep phase favorable to awakening, the method comprising:
- registering a pulse wave signal and an occurrence of limb movements of the human during sleep using a pulse wave sensor and at least one motion sensor attached to a body of the human;
measuring values of RR intervals and a respiratory rate; and
determining values of function F(Δ
ti) over preset time intervals Δ
ti and determining an onset and termination of the sleep phase favorable to awakening based on an increment of function F(Δ
ti), where i is a serial number of a time interval, wherein;
F(Δ
ti)=−
K1P1−
K2P2−
K3P3+K4P4+K5P5K6P6,wherein;
P1 is a mean value of the RR intervals over a time interval Δ
ti;
P2 is a minimal value of the RR intervals over the time interval Δ
ti;
P3 is a maximal value of RR intervals over the time interval Δ
ti;
P4 is a standard deviation of the RR intervals over a preceding time interval of 3 to 20 min;
P5 is a mean value of the respiratory rate over the time interval Δ
ti;
P6 is an average number of human limb movements over a preceding time period ranging from 0.5 minutes to 10 minutes; and
K1-K6 are weight coefficients characterizing contribution of parameters P1-P6 to the values of the function F(Δ
ti).
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Abstract
A pulse wave signal is registered and an occurrence of human limb movements detected during sleep using a pulse wave sensor and an accelerometer. The values of RR intervals and respiratory rate are measured at preset time intervals Δti based on pulse wave signal. Mean P1, minimal P2, and maximal P3 values of RR intervals, the standard deviation of RR intervals P4, average respiratory rate P5 and average number of limb movements P6 are determined based on the above measured values. Function value F(Δti) is determined thereafter as:
F(Δti)=−K1P1−K2P2−K3P3+K4P4+K5P5+K6P6,
where K1-K6 are weight coefficients characterizing the contribution of the corresponding parameter to function value F(Δti); whereat the onset and termination of sleep phase favorable to awakening is determined by increments of function F(Δti).
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Citations
15 Claims
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1. A method for determining a human sleep phase favorable to awakening, the method comprising:
-
registering a pulse wave signal and an occurrence of limb movements of the human during sleep using a pulse wave sensor and at least one motion sensor attached to a body of the human; measuring values of RR intervals and a respiratory rate; and determining values of function F(Δ
ti) over preset time intervals Δ
ti and determining an onset and termination of the sleep phase favorable to awakening based on an increment of function F(Δ
ti), where i is a serial number of a time interval, wherein;
F(Δ
ti)=−
K1P1−
K2P2−
K3P3+K4P4+K5P5K6P6,wherein; P1 is a mean value of the RR intervals over a time interval Δ
ti;P2 is a minimal value of the RR intervals over the time interval Δ
ti;P3 is a maximal value of RR intervals over the time interval Δ
ti;P4 is a standard deviation of the RR intervals over a preceding time interval of 3 to 20 min; P5 is a mean value of the respiratory rate over the time interval Δ
ti;P6 is an average number of human limb movements over a preceding time period ranging from 0.5 minutes to 10 minutes; and K1-K6 are weight coefficients characterizing contribution of parameters P1-P6 to the values of the function F(Δ
ti).- View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15)
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Specification