SLEEP EVALUATION DEVICE
First Claim
1. A sleep evaluation device comprising:
- a biometric signal measurer that measures a state of a human subject, for output as a biometric signal;
a primary parameter generator that generates, based on the biometric signal, n number of primary parameters indicating a state of sleep, the n being a natural number that is at least 2;
a secondary parameter generator that generates m number of secondary parameters by multiplying each of the n number of primary parameters by an eigenvector, with the eigenvector being a first coefficient, and totalizing results of the multiplications, the m being a natural number satisfying n≧
m and a correlation coefficient of any two of the secondary parameters being smaller than a correlation coefficient of any two of the primary parameters; and
a sleep index generator that computes a sleep index indicating a quality of sleep based on a result of computation obtained by multiplying each of the secondary parameters by a second coefficient and totalizing results of the multiplications.
1 Assignment
0 Petitions
Accused Products
Abstract
A sleep evaluation device 1 is provided with a respiration detection unit 7 that detects changes in respiration and outputs respiration signals. CPU 6 generates six primary parameters indicating sleep states based on the respiration signals and four secondary parameters based on the primary parameters. The secondary parameters are linearly independent of one another. Evaluation unit 20 computes a sleep score indicating the degree of the quality of sleep by multiplying each of the four secondary parameters by second coefficients and totalizing results of the multiplications. Results of the evaluations are displayed on display unit 4.
139 Citations
6 Claims
-
1. A sleep evaluation device comprising:
-
a biometric signal measurer that measures a state of a human subject, for output as a biometric signal; a primary parameter generator that generates, based on the biometric signal, n number of primary parameters indicating a state of sleep, the n being a natural number that is at least 2; a secondary parameter generator that generates m number of secondary parameters by multiplying each of the n number of primary parameters by an eigenvector, with the eigenvector being a first coefficient, and totalizing results of the multiplications, the m being a natural number satisfying n≧
m and a correlation coefficient of any two of the secondary parameters being smaller than a correlation coefficient of any two of the primary parameters; anda sleep index generator that computes a sleep index indicating a quality of sleep based on a result of computation obtained by multiplying each of the secondary parameters by a second coefficient and totalizing results of the multiplications. - View Dependent Claims (2, 3, 4, 5, 6)
-
Specification