Sleep evaluation device and sleep evaluation method therefor
First Claim
1. A sleep evaluation device comprising:
- a body movement detector that constantly detects body movements of a human subject lying on bedding; and
a determiner configured to;
quantify at a predetermined time interval, the results of the detection of the body movement detector as N number of body movement data, in which N is a positive integral number satisfying N≧
2,obtain G number of standard deviations for each of G groups dividing the N number of body movement data and for each body movement data included in each group, in which the G is an integral number satisfying 2≦
G<
N,obtain L number of average values of standard deviations on the basis of consecutive gs number of standard deviations (gs<
G), from among the G number of standard deviations, in which L is an integral number satisfying 2≦
L≦
G, and wherein obtaining comprises calculating the L number of average values of standard deviations for a consecutive time interval of body movement data, and wherein each of the L number of average values of standard deviations is assigned a number, pth, which corresponds to a time of acquiring the body movement data;
obtain as a baseline value, from among the L number of average values of standard deviations, an average value of all pth average values of standard deviations that satisfy a condition that an absolute value of a difference between a pth average value of standard deviations and a (p+1)th average value of standard deviations is equal to or is less than a predetermined value, in which p is an integral number satisfying p≦
L−
1, anddetermine on the basis of the G number of standard deviations and the base line baseline values, whether the human subject is in a sleep state or is in an aroused state.
1 Assignment
0 Petitions
Accused Products
Abstract
A sleep evaluation device (1) has a sensor unit (2) that constantly detects body movements of a human subject on bedding, and has a determiner that, based on results of detection, determines a sleep state and an aroused state of the human subject. The determiner quantifies results of detection of the sensor unit into N number of body movement data (where, N is a positive integral number satisfying N≧2) and obtains, based on G number of standard deviations for each of G groups (in which G is an integral number satisfying 2≦G<N) dividing N number of body movement data and for each body movement data and gs (gs<G) number of standard deviations selected therefrom, L number of average value of standard deviations (where L is an integral number satisfying 2≦L≦G). The determination of a sleep state and an aroused state of the human subject is based on G number of standard deviations and L number of average values of standard deviations.
8 Citations
7 Claims
-
1. A sleep evaluation device comprising:
-
a body movement detector that constantly detects body movements of a human subject lying on bedding; and
a determiner configured to;quantify at a predetermined time interval, the results of the detection of the body movement detector as N number of body movement data, in which N is a positive integral number satisfying N≧
2,obtain G number of standard deviations for each of G groups dividing the N number of body movement data and for each body movement data included in each group, in which the G is an integral number satisfying 2≦
G<
N,obtain L number of average values of standard deviations on the basis of consecutive gs number of standard deviations (gs<
G), from among the G number of standard deviations, in which L is an integral number satisfying 2≦
L≦
G, and wherein obtaining comprises calculating the L number of average values of standard deviations for a consecutive time interval of body movement data, and wherein each of the L number of average values of standard deviations is assigned a number, pth, which corresponds to a time of acquiring the body movement data;obtain as a baseline value, from among the L number of average values of standard deviations, an average value of all pth average values of standard deviations that satisfy a condition that an absolute value of a difference between a pth average value of standard deviations and a (p+1)th average value of standard deviations is equal to or is less than a predetermined value, in which p is an integral number satisfying p≦
L−
1, anddetermine on the basis of the G number of standard deviations and the base line baseline values, whether the human subject is in a sleep state or is in an aroused state. - View Dependent Claims (2, 3, 4, 5, 6, 7)
-
Specification