KR102392666B1 - Method and system for determining sleep status - Google Patents

Abstract

The present invention relates to a method and system capable of determining the user's sleep state by analyzing the user's posture and tossing and turning, and whether the user is in a sleep state or not sleeping using a plurality of data collected from a sensor installed on a mat It relates to a method and system for determining whether or not there is a failure, the method comprising: collecting a user's posture data and toss and down data from a sensor of a mat; determining whether the user is lying on the mat; determining the number of toss and turns of the user; counting the sleep continuity index of the user based on the number of toss and turns; and determining the user's sleep state according to the sleep continuity index.

Description

Method and system for determining sleep state

The present invention relates to a method and system capable of determining the user's sleep state by analyzing the user's posture and tossing and turning, and whether the user is in a sleep state or not sleeping using a plurality of data collected from a sensor installed on a mat It relates to a method and system capable of determining whether or not there is a failure.

Health care, in a broad sense, includes all processes of disease treatment, prevention, and health management, and as interest in health increases, interest in overall health care is also increasing.

Recently, when health care and IT technology are combined, many people can use medical services more freely. For example, if medical services and ubiquitous IT technology are used, telemedicine service called u-health care that can receive health care anytime, anywhere is possible. Using IT technology, if you create a health center equipped with a device that allows you to receive treatment through video calls in an area where it is difficult to receive treatment because the distance between your home and hospital is too far, you can receive consultations on disease and health in real time with hospitals across the country. there will be

Also, health care using portable smart devices is increasing. A wearable device worn on the wrist checks the amount of exercise, sleep time, and quality of sleep, and informs and manages the amount of exercise required and common sense about health. As smart devices develop, health care will also be performed smoothly.

Sleep has a very large impact on health and daily life, and sleep quality is important as well as sleep time. Therefore, in the health care field, the sleep care field to improve the quality of sleep is receiving new attention.

In sleep care, it is particularly important to determine whether the current user is sleeping or not. This is because in order to improve the quality of sleep according to the user's condition, it is necessary to first determine whether the user is sleeping well or not.

In the existing sleep care system, various methods for judging the user's sleep state have been suggested, but it is difficult to use a standard that is not easy to measure, or because there are many standards required for measurement, the calculation is complicated, the load is increased, or the accuracy is low. However, there was a disadvantage in that the cost required to construct the system required for measurement was too high.

Therefore, in order to solve the problems of the existing sleep determination method or system, there is a need for a method and system capable of accurately determining whether a user is sleeping while using simple and inexpensive equipment.

Accordingly, the present invention provides a method and system capable of determining whether the user is sleeping by checking whether the user is lying in bed and the number of times he or she is tossed during sleep to solve the above problems.

The present invention provides a method and system capable of determining whether the user is sleeping through a step-by-step determination step based on the checked information by checking the user's posture and the number of toss and downs at regular time intervals.

A sleep state determination method according to an embodiment of the present invention for solving the above problem includes collecting the user's posture data and toss and down data from the sensor of the mat; determining whether the user is lying on the mat; determining the number of toss and turns of the user; counting the sleep continuity index of the user based on the number of toss and downs; and determining the user's sleep state according to the sleep continuity index.

According to an embodiment of the present invention, the step of collecting the posture data and toss and down data may collect the posture data and toss and turn data at preset time intervals.

According to an embodiment of the present invention, the sensor includes a pressure sensor and an acceleration sensor, the posture data includes a pressure value measured by the pressure sensor, and the toss and down data includes vibration data measured by the acceleration sensor may include

According to an embodiment of the present invention, determining whether the user is lying on the mat may include; determining that the user is lying when the pressure sensor measurement value is greater than or equal to the pressure threshold.

According to an embodiment of the present invention, the step of determining the number of toss and turns of the user comprises: arranging a first section equal to or greater than the pressure threshold; extracting a second section in which the vibration value of the vibration data measured by the acceleration sensor is equal to or greater than a vibration threshold value in the arranged section; and determining that there is toss and downs when the extracted length of the second section is greater than or equal to a time threshold.

A sleep state determination system according to an embodiment of the present invention for solving the above problem is a mat; a sensor unit that collects the user's posture data and toss and down data from the mat; And determining whether the user is lying on the mat and the number of toss and turns of the user, counts the user's sleep continuity index based on the number of toss and downs, and determines the user's sleep state according to the sleep continuity index ; may be included.

According to an embodiment of the present invention, the sensor unit may collect the posture data and toss and turn data at preset time intervals.

According to an embodiment of the present invention, the sensor unit includes a pressure sensor; and an acceleration sensor, wherein the posture data may include a pressure value measured by the pressure sensor, and the toss and down data may include vibration data measured by the acceleration sensor.

According to an embodiment of the present invention, the determination unit may determine that the user is lying down when the pressure sensor measurement value is equal to or greater than a pressure threshold.

According to an embodiment of the present invention, the determination unit arranges a first section equal to or greater than the pressure threshold, and in the arranged first section, the vibration value of the vibration data measured by the acceleration sensor is equal to or greater than the vibration threshold value. Two sections are extracted, and when the length of the extracted second section is equal to or greater than a time threshold, it can be determined that there is toss and downs.

According to the present invention, based on the data measured by the pressure sensor for measuring the pressure applied when the user is lying on the bed and the pressure applied to the user and the acceleration sensor for measuring the toss and downs, it is determined whether the user is lying down and how many times toss and turns. It is possible to determine the user's sleep state.

In addition, it is possible to prevent the side effect of indiscriminately determining the non-sleep state by checking the posture and tossing and turning when it exceeds a certain value extracted based on the average human sleep state.

On the other hand, the effects of the present invention are not limited to the above-mentioned effects, and various effects may be included within the range obvious to those skilled in the art from the description below.

1 is an algorithm diagram of a sleep state determination method according to an embodiment of the present invention.
2 is a block diagram of a sleep state determination system according to an embodiment of the present invention.
3 is an example of an acceleration sensor included in the sensor unit of the sleep state determination system according to an embodiment of the present invention.
4 is an example of a measurement value of an acceleration sensor included in a sensor unit of a sleep state determination system according to an embodiment of the present invention.
5 is an example of a pressure sensor included in the sensor unit of the sleep state determination system according to an embodiment of the present invention.
6 is an example of a measurement value of a pressure sensor included in the sensor unit of the sleep state determination system according to an embodiment of the present invention.
7 is a flowchart of a method for determining a sleep state according to an embodiment of the present invention.
8 is a flowchart of a toss and down determination method of a sleep state determination method according to an embodiment of the present invention.

Hereinafter, a 'sleep state determination method and system' according to the present invention will be described in detail with reference to the accompanying drawings. The described embodiments are provided so that those skilled in the art can easily understand the technical spirit of the present invention, and the present invention is not limited thereto. In addition, matters expressed in the accompanying drawings may be different from the forms actually implemented in the drawings schematically for easy explanation of the embodiments of the present invention.

On the other hand, each component expressed below is only an example for implementing the present invention. Accordingly, other components may be used in other implementations of the present invention without departing from the spirit and scope of the present invention.

In addition, each component may be implemented purely by a configuration of hardware or software, or may be implemented by a combination of various hardware and software components that perform the same function. In addition, two or more components may be implemented together by one piece of hardware or software.

In addition, the expression 'including' certain components merely refers to the existence of the corresponding components as an expression of 'open type', and should not be construed as excluding additional components.

1 is an algorithm diagram of a sleep state determination method according to an embodiment of the present invention, FIG. 2 is a block diagram of a sleep state determination system according to an embodiment of the present invention, and FIG. 3 is an embodiment of the present invention 4 is an example of an acceleration sensor included in the sensor unit of the sleep state determination system according to the present invention, and FIG. 4 is an example of a measurement value of the acceleration sensor included in the sensor unit of the sleep state determination system according to an embodiment of the present invention 5 is an example of a pressure sensor included in the sensor unit of the sleep state determination system according to an embodiment of the present invention, Figure 6 is a pressure sensor included in the sensor unit of the sleep state determination system according to an embodiment of the present invention is an example of a measurement value of , FIG. 7 is a flowchart of a sleep state determination method according to an embodiment of the present invention, and FIG. 8 is a flowchart of a toss and down determination method of a sleep state determination method according to an embodiment .

1 to 8 , the sleep state determination system 100 according to an embodiment of the present invention may include a mat 110 , a sensor unit 120 , and a determination unit 130 .

The mat 110 may be bedding when the user sleeps. That is, the user can sleep while lying on the mat 110 when sleeping. The mat 110 may include a bed mattress or a floor mat, but is not limited thereto, and may include all bedding on which the user can lie down while sleeping.

The sensor unit 120 may be included in the mat 110 . The sensor unit 120 may be included inside or outside the mat 110 to check the user's sleep state. The sensor unit 120 may acquire data for determining whether the user is lying on the mat 110 . The sensor unit 120 may acquire data for determining whether the user's toss and downs are present on the mat 110 .

The sensor unit 120 may include a pressure sensor and an acceleration sensor.

The pressure sensor of the sensor unit 120 may check the pressure applied by the user to the mat 110 . At least one pressure sensor of the sensor unit 120 may be included in the mat 110 . Only one pressure sensor of the sensor unit 120 may be included in the mat. The pressure sensor of the sensor unit 120 may measure a pressure value applied to a length of 500 to 700 mm. Preferably, the pressure sensor of the sensor unit 120 may measure a pressure value applied to a length of 550 to 650 mm. The pressure sensor of the sensor unit 120 may measure the position of the portion where the pressure is measured and the pressure value at the position. The pressure sensor of the sensor unit 120 may measure the position of the portion where the pressure is measured and the pressure information at the position by using at least one of both ends of the length as a reference point. The pressure sensor of the sensor unit 120 may measure a pressure value at a time interval of 0.2 seconds or less. Preferably, the pressure sensor of the sensor unit 120 may measure the X pressure value at a time interval of 0.1 second or less.

According to an embodiment of the present invention, the pressure sensor of the sensor unit 120 may include FSR-408, but is not limited thereto, and may include any device capable of measuring pressure.

According to an embodiment of the present invention, the recognition range of the pressure sensor of the sensor unit 120 may be 0.2 to 20N. Preferably, the recognition range of the pressure sensor of the sensor unit 120 may be 0.3 to 50N. Preferably, the recognition range of the pressure sensor of the sensor unit 120 may be 0.5 to 150N. It can be confirmed by quantifying the magnitude of the pressure (in this case, gravity) applied on the sensor. The pressure sensor of the sensor unit 120 may display the measured pressure value as a numerical value between 0 and 4095. The pressure sensor of the sensor unit 120 may measure the pressure value, and the measured value may be analyzed by the MCP3208 ADC and received as a numeric value in the range of 0 to 4095 and stored as a one-dimensional array.

The acceleration sensor of the sensor unit 120 may measure a vibration value for detecting the toss and downs of the user lying on the mat 110 . The acceleration sensor of the sensor unit 120 may measure at least one of inclination and rotation in three directions. The acceleration sensor of the sensor unit 120 may measure the amount of change in inclination in three directions in units of a predetermined time. The acceleration sensor of the sensor unit 120 may calculate a vibration value using the amount of change in inclination in three directions measured in units of a predetermined time.

According to an embodiment of the present invention, the acceleration sensor of the sensor unit 120 may be MPU-9250. The acceleration sensor of the sensor unit 120 may measure the inclination value based on three axes of X, Y, and Z. The acceleration sensor of the sensor unit 120 may measure the inclination value for each of the three axes X, Y, and Z at a time interval of 0.2 seconds or less. Preferably, the acceleration sensor of the sensor unit 120 may measure the inclination value for each of the three axes X, Y, and Z at a time interval of 0.1 second or less. The acceleration sensor of the sensor unit 120 uses three axes of X, Y, and Z as the center and uses the principle of the Earth's gravity and compass to measure parallel and vertical inclination of a sensor or an object to which the sensor is attached in a three-dimensional phase space. rotation can be detected. The slope change amount measured by the acceleration sensor of the sensor unit 120 is the slope change amount δXt of each value for an increase in unit time (100 ms) t, when the values of the slope detected at a specific time t are Xt, Yt, and Zt, respectively. , δYt, and δZt are the same as in Equation 1 below.

[Equation 1]

δXt = Xt - Xt-1

δYt = Yt - Yt-1

δZt = Zt - Zt-1

The Xt, Yt, and Zt may be measured as a real number of 0 to 1. Each value in the three-dimensional phase space measured by the acceleration sensor of the sensor unit 120 is a simple vector each having a direction in the X, Y, and Z axes. By taking the geometric mean as a single value of one dimension and differentiating it with time, if we unravel this reduced value, it is the average change in inclination in three dimensions of the sensor or the object to which the sensor is attached at a specific time t, which can be defined as a vibration value. When the vibration value is Vt, Vt can be obtained as in Equation 2 below.

[Equation 2]

Vt =

The acceleration sensor of the sensor unit 120 may multiply the Xt, Yt, Zt or δXt, δYt, and δZt by 100 million and subtract 50 million. The acceleration sensor of the sensor unit 120 may store the measured vibration value as a one-dimensional numeric array. As shown in FIG. 4 , if there is no movement when the user is on the mat, the vibration, that is, the vibration value is measured as 0, and when vibration occurs through tossing and turning, values corresponding to the intensity are detected. Through this, it can be seen that user 139 was tossed and turned around 11:01:23 PM on July 10, 2019.

The determination unit 130 may determine whether the user is sleeping or not sleeping by using the value measured by the sensor unit 120 . The determination unit 130 may include a computer, but is not limited thereto, and may include any device capable of performing mathematical operations and determination.

The determination unit 130 may increase or decrease the sleep continuity index at a preset sleep recognition time interval. The sleep recognition time interval may be 50 to 70 seconds. Preferably, the sleep recognition time interval may be 57 to 63 seconds. The determination unit 130 may determine whether the user is sleeping by using the sleep continuity index.

The determination unit 130 may determine whether the user is lying on the mat 110 . The determination unit 130 may determine whether the user is lying on the mat 110 by using the pressure value measured by the pressure sensor of the sensor unit 120 . The determination unit 130 may determine that the user is lying on the mat 110 when the pressure value measured by the pressure sensor of the sensor unit 120 is greater than or equal to a preset pressure threshold. The pressure threshold may be set to a pressure value of zero or more. According to an embodiment of the present invention, the pressure threshold may be 1000. Preferably, the pressure threshold may be 2000. According to an embodiment of the present invention, the determination unit 130 may determine whether the user is lying down or sitting according to the length of the portion at which the pressure value is measured in the pressure sensor.

The determination unit 130 may determine whether the user is tossing and turning on the mat 110 . The determination unit 130 may determine whether the user is tossing and turning using the vibration value measured by the acceleration sensor of the sensor unit 120 . The determination unit 130 may arrange the first section by cutting the vibration value of the section in which the pressure value is equal to or greater than the pressure threshold. The determination unit 130 may extract a second section in which the vibration value is equal to or greater than a vibration threshold in the first section. The determination unit 130 may determine that there is toss and downs when the length of the second section is equal to or greater than a time threshold. The vibration threshold may be 15000 to 25000. Preferably, the vibration threshold may be 18000 to 22000. The time threshold may be 1 to 4 seconds. Preferably, the time threshold may be 1.5 to 2.5 seconds.

The determination unit 130 may count the number of toss and downs during the sleep recognition time interval. When the sleep recognition time interval ends, the determination unit 130 may determine that the user is awake if the user is not lying on the mat 110 . When it is determined that the user is lying on the mat 110 , the determination unit 130 may determine whether the number of toss and turns of the user is greater than or less than a preset number of times. The determination unit 130 may increase the sleep continuity index when the number of toss and downs of the user is less than 5 times. Preferably, the sleep continuity index may be increased by 1 steam. The determination unit 130 may decrease the sleep continuity index when the number of toss and downs of the user is 5 or more. Preferably, the sleep continuity index may be reduced by 5.

The determination unit 130 may determine whether the sleep continuity index is 15 or more when the sleep continuity index is increased. When the sleep continuity index is less than 15, the determination unit 130 may store the sleep continuity index and determine that the user is awake. The determination unit 130 stores the sleep continuity index as 15 when the sleep continuity index is 15 or more, and then the determination unit 130 determines that the user is sleeping when the sleep continuity index is 15 or more. there is.

When the sleep continuity index is decreased, the determination unit 130 may determine whether the sleep continuity index is less than 0. If the sleep continuity index is less than 0, the determination unit 130 may initialize the sleep continuity index to 0 and determine that the user is awake. When the sleep continuity index is 0 or more, the determination unit 130 may store the sleep continuity index and determine that the user is awake.

The determination unit 130 may determine that the user is in a state closer to sleep as the sleep continuity index increases.

The sleep state determination method according to an embodiment of the present invention may include collecting the user's posture data and toss and down data from a sensor of the mat (S110).

In step S110, the mat 110 may be bedding when the user sleeps. That is, the user can sleep while lying on the mat 110 when sleeping. The mat 110 may include a bed mattress or a floor mat, but is not limited thereto, and may include all bedding on which the user can lie down while sleeping.

In step S110 , the sensor unit 120 may be included in the mat 110 . The sensor unit 120 may be included inside or outside the mat 110 to check the user's sleep state. The sensor unit 120 may acquire data for determining whether the user is lying on the mat 110 . The sensor unit 120 may acquire data for determining whether the user's toss and downs are present on the mat 110 .

In step S110, the sensor unit 120 may include a pressure sensor and an acceleration sensor.

In step S110 , the pressure sensor of the sensor unit 120 may check the pressure that the user applies to the mat 110 . At least one pressure sensor of the sensor unit 120 may be included in the mat 110 . Only one pressure sensor of the sensor unit 120 may be included in the mat. The pressure sensor of the sensor unit 120 may measure a pressure value applied to a length of 500 to 700 mm. Preferably, the pressure sensor of the sensor unit 120 may measure a pressure value applied to a length of 550 to 650 mm. The pressure sensor of the sensor unit 120 may measure the position of the portion where the pressure is measured and the pressure value at the position. The pressure sensor of the sensor unit 120 may measure the position of the portion where the pressure is measured and the pressure information at the position by using at least one of both ends of the length as a reference point. The pressure sensor of the sensor unit 120 may measure a pressure value at a time interval of 0.2 seconds or less. Preferably, the pressure sensor of the sensor unit 120 may measure the X pressure value at a time interval of 0.1 second or less.

In step S110, according to an embodiment of the present invention, the pressure sensor of the sensor unit 120 may include FSR-408, but is not limited thereto, and may include any device capable of measuring pressure.

In step S110, according to an embodiment of the present invention, the recognition range of the pressure sensor of the sensor unit 120 may be 0.2 ~ 20N. Preferably, the recognition range of the pressure sensor of the sensor unit 120 may be 0.3 to 50N. Preferably, the recognition range of the pressure sensor of the sensor unit 120 may be 0.5 to 150N. It can be confirmed by quantifying the magnitude of the pressure (in this case, gravity) applied on the sensor. The pressure sensor of the sensor unit 120 may display the measured pressure value as a numerical value between 0 and 4095. The pressure sensor of the sensor unit 120 may measure the pressure value, and the measured value may be analyzed by the MCP3208 ADC and received as a numeric value in the range of 0 to 4095 and stored as a one-dimensional array.

In step S110 , the acceleration sensor of the sensor unit 120 may measure a vibration value for detecting the toss and downs of the user lying on the mat 110 . The acceleration sensor of the sensor unit 120 may measure at least one of inclination and rotation in three directions. The acceleration sensor of the sensor unit 120 may measure the amount of change in inclination in three directions in units of a predetermined time. The acceleration sensor of the sensor unit 120 may calculate a vibration value using the amount of change in inclination in three directions measured in units of a predetermined time.

In step S110, according to an embodiment of the present invention, the acceleration sensor of the sensor unit 120 may be MPU-9250. The acceleration sensor of the sensor unit 120 may measure the inclination value based on three axes of X, Y, and Z. The acceleration sensor of the sensor unit 120 may measure the inclination value for each of the three axes X, Y, and Z at a time interval of 0.2 seconds or less. Preferably, the acceleration sensor of the sensor unit 120 may measure the inclination value for each of the three axes X, Y, and Z at a time interval of 0.1 second or less. The acceleration sensor of the sensor unit 120 uses three axes of X, Y, and Z as the center and uses the principle of the Earth's gravity and compass to measure parallel and vertical inclination of a sensor or an object to which the sensor is attached in a three-dimensional phase space. rotation can be detected. The slope change amount measured by the acceleration sensor of the sensor unit 120 is the slope change amount δXt of each value for an increase in unit time (100 ms) t, when the values of the slope detected at a specific time t are Xt, Yt, and Zt, respectively. , δYt, and δZt are the same as in Equation 1 below.

[Equation 1]

δXt = Xt - Xt-1

δYt = Yt - Yt-1

δZt = Zt - Zt-1

In step S110, the Xt, Yt, and Zt may be measured as a real number of 0 to 1. Each value in the three-dimensional phase space measured by the acceleration sensor of the sensor unit 120 is a simple vector each having a direction in the X, Y, and Z axes. By taking the geometric mean as a single value of one dimension and differentiating it with time, if we unravel this reduced value, it is the average change in inclination in three dimensions of the sensor or the object to which the sensor is attached at a specific time t, which can be defined as a vibration value. When the vibration value is Vt, Vt can be obtained as in Equation 2 below.

[Equation 2]

Vt =

In step S110, the acceleration sensor of the sensor unit 120 may multiply the Xt, Yt, and Zt or δXt, δYt, and δZt by 100 million and subtract 50 million. The acceleration sensor of the sensor unit 120 may store the measured vibration value as a one-dimensional numeric array.

The sleep state determination method according to an embodiment of the present invention may include determining whether the user is lying on the mat (S120).

In step S120 , the determination unit 130 may determine whether the user is lying on the mat 110 . The determination unit 130 may determine whether the user is lying on the mat 110 by using the pressure value measured by the pressure sensor of the sensor unit 120 . The determination unit 130 may determine that the user is lying on the mat 110 when the pressure value measured by the pressure sensor of the sensor unit 120 is greater than or equal to a preset pressure threshold. The pressure threshold may be set to a pressure value of zero or more. According to an embodiment of the present invention, the pressure threshold may be 1000. Preferably, the pressure threshold may be 2000. According to an embodiment of the present invention, the determination unit 130 may determine whether the user is lying down or sitting according to the length of the portion at which the pressure value is measured in the pressure sensor.

The sleep state determination method according to an embodiment of the present invention may include determining the number of toss and downs of the user (S130).

The step S130 is a step of arranging a first section that is equal to or greater than the pressure threshold (S131), and extracting a second section in which the vibration value of the vibration data measured by the acceleration sensor in the arranged section is equal to or greater than the vibration threshold value It may include the step (S132) and the step (S133) of determining that there is toss and downs when the length of the extracted second section is equal to or greater than the time threshold.

In step S131 , the determination unit 130 may determine whether the user is tossing and turning on the mat 110 . The determination unit 130 may determine whether the user is tossing and turning using the vibration value measured by the acceleration sensor of the sensor unit 120 . The determination unit 130 may arrange the first section by cutting the vibration value of the section in which the pressure value is equal to or greater than the pressure threshold.

In step S132 , the determination unit 130 may extract a second section in which the vibration value is equal to or greater than a vibration threshold in the first section. The vibration threshold may be 15000 to 25000. Preferably, the vibration threshold may be 18000 to 22000.

In step S133 , the determination unit 130 may determine that there is toss and downs when the length of the second section is equal to or greater than a time threshold. The time threshold may be 1 to 4 seconds. Preferably, the time threshold may be 1.5 to 2.5 seconds.

The sleep state determination method according to an embodiment of the present invention may include counting the user's sleep continuity index based on the number of toss and downs (S140).

In step S140, the determination unit 130 may increase or decrease the sleep continuity index according to the determination result of the step S120 and the step S130 at a preset sleep recognition time interval. The sleep recognition time interval may be 50 to 70 seconds. Preferably, the sleep recognition time interval may be 57 to 63 seconds. The determination unit 130 may determine whether the user is sleeping by using the sleep continuity index.

In step S140, the determination unit 130 may count the number of toss and turns during the sleep recognition time interval. When the sleep recognition time interval ends, the determination unit 130 may determine that the user is awake if the user is not lying on the mat 110 . When it is determined that the user is lying on the mat 110 , the determination unit 130 may determine whether the number of toss and turns of the user is greater than or less than a preset number of times. The determination unit 130 may increase the sleep continuity index when the number of toss and downs of the user is less than 5 times. Preferably, the sleep continuity index may be increased by 1 steam. The determination unit 130 may decrease the sleep continuity index when the number of toss and downs of the user is 5 or more. Preferably, the sleep continuity index may be reduced by 5.

The sleep state determination method according to an embodiment of the present invention may include determining the user's sleep state according to the sleep continuity index (S150).

In step S145, when the sleep continuity index is increased, the determination unit 130 may determine whether the sleep continuity index is 15 or more. When the sleep continuity index is less than 15, the determination unit 130 may store the sleep continuity index and determine that the user is awake. The determination unit 130 stores the sleep continuity index as 15 when the sleep continuity index is 15 or more, and then the determination unit 130 determines that the user is sleeping when the sleep continuity index is 15 or more. there is.

In step S145, when the sleep continuity index is decreased, the determination unit 130 may determine whether the sleep continuity index is less than 0. If the sleep continuity index is less than 0, the determination unit 130 may initialize the sleep continuity index to 0 and determine that the user is awake. When the sleep continuity index is 0 or more, the determination unit 130 may store the sleep continuity index and determine that the user is awake.

In step S145 , the determination unit 130 may determine that the user is in a state closer to sleep as the sleep continuity index increases.

So far, the present invention has been looked at with respect to preferred embodiments thereof. Those of ordinary skill in the art to which the present invention pertains will understand that the present invention can be implemented in a modified form without departing from the essential characteristics of the present invention. Therefore, the disclosed embodiments are to be considered in an illustrative rather than a restrictive sense. The scope of the present invention is indicated in the claims rather than the foregoing description, and all differences within the scope equivalent thereto should be construed as being included in the present invention.

Claims (10)

collecting the user's posture data and toss and down data from the sensor of the mat;
determining whether the user is lying on the mat;
determining the number of toss and turns of the user;
counting the sleep continuity index of the user based on the number of toss and downs; and
Including; determining the user's sleep state according to the sleep continuity index;
The sensor includes a pressure sensor and an acceleration sensor,
The posture data includes a pressure value measured by the pressure sensor,
The toss and down data includes vibration data measured by the acceleration sensor,
The step of determining whether lying on the mat is,
Determining that the user is lying when the pressure sensor measurement value is greater than or equal to the pressure threshold;
The step of determining the number of toss and turns of the user,
arranging a first section above the pressure threshold;
extracting a second section in which the vibration value of the vibration data measured by the acceleration sensor is equal to or greater than a vibration threshold value in the arranged section; and
Determining that there is a toss and turns when the length of the extracted second section is greater than or equal to a time threshold;
The posture data and toss and turn data collection step is,
A sleep state determination method, characterized in that the vibration data is calculated by calculating Equation 1 below.
[Equation 1]
Vt =

(Here, δXt and δδ are the x-axis, y-axis, and z-axis gradient changes measured by the acceleration sensor.)
According to claim 1,
The posture data and toss and turn data collection step is,
Sleep state determination method, characterized in that collecting the posture data and toss and turns data at preset time intervals.
delete delete According to claim 1,
The step of determining the number of toss and turns of the user,
arranging a first section above the pressure threshold;
extracting a second section in which the vibration value of the vibration data measured by the acceleration sensor is equal to or greater than a vibration threshold value in the arranged section; and
When the extracted length of the second section is greater than or equal to a time threshold, determining that there is toss and downs; a method for determining sleep state including.
mat;
a sensor unit that collects the user's posture data and toss and down data from the mat; and
A determination unit for determining whether the user is lying on the mat and the number of toss and turns of the user, and counts the user's sleep continuity index based on the number of toss and downs to determine the user's sleep state according to the sleep continuity index; including,
The sensor unit,
pressure sensor; and
Accelerometer; includes;
The posture data includes a pressure value measured by the pressure sensor,
The toss and down data includes vibration data measured by the acceleration sensor,
The judging unit,
If the pressure sensor measurement value is greater than the pressure threshold, it is determined that the user is lying down,
The judging unit,
A first section equal to or greater than the pressure threshold is arranged, and a second section in which the vibration value of the vibration data measured by the acceleration sensor is equal to or greater than the vibration threshold value is extracted from the arranged first section, and the extracted second section If the length of is equal to or greater than the time threshold, it is judged that there is a tossing,
The posture data and toss and turn data collection step is,
A sleep state determination system, characterized in that the vibration data is calculated by calculating Equation 1 below.
[Equation 1]
Vt =

(Here, δXt and δδ are the x-axis, y-axis, and z-axis gradient changes measured by the acceleration sensor.)
7. The method of claim 6,
The sensor unit,
Sleep state determination system, characterized in that collecting the posture data and toss and down data at preset time intervals.


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